Abstract: A clutch assembly includes a housing defining an axis. A plurality of plates disposed within the housing are in driving engagement with the housing around the axis. The housing defines a housing wall circumscribing the axis and having a sinusoidal configuration including a wall crest and a wall trough. The wall crest and the wall trough are substantially parallel to the axis defined by the housing. The plates have teeth complimentary of the sinusoidal configuration of the housing wall for engaging the housing wall enabling the driving engagement between the housing wall and the plates.

Abstract: A gear shifting system is described that includes an first shaft that is connected to a motor to be rotated thereby, a synchronizing gear, a first insert unit and a second insert unit protrude at both sides thereof, a first gear and a second gear configured to rotate around the first shaft, a first plate and a second plate, a first engagement aperture and a second engagement aperture, and a second shaft. The second shaft is configured to move the synchronizing gear in an axial direction so that the first insert unit is inserted into the first engagement aperture or the second insert unit is inserted into the second engagement aperture to transfer a torque of the synchronizing gear to the first gear or the second gear.

Abstract: A sintered coupling ring (1) is described, comprising a ring of coupling teeth (2) which comprise relieved flanks (4) extending from wedge-shaped end faces (3) and, on the side opposite the wedge-shaped end faces (3), a stop (5) that protrudes radially beyond the tooth tip (6). In order to provide advantageous constructional conditions it is proposed that the stops (5) have a greater density than the remaining tooth tip (6).

Abstract: A ratchet base structure for a bicycle includes a ratchet base and a plurality of enforcing ribs, The ratchet base has a plurality of positioning protrusions and locating protrusions. A plurality of cavities is adjacent to the locating protrusions. Each locating protrusions has an attaching face. Each enforcing rib has an abutting part connected to a fastening part via a connecting part. The fastening part is passed through the cavity to connect to the ratchet base so that the enforcing ribs are assembled on the ratchet base. Under this arrangement, when the flying wheel is rotated, the enforcing ribs suffer a torsion force from the flying wheel so as to avoid the locating protrusions from damaging.

Abstract: The present invention discloses a ratchet wheel for a tightener in the field of mechanics, which addresses the problems existing in the conventional tighteners that the ratchet wheel tends to be shifted to offset or dislocate the reel. The ratchet wheel for the tightener includes a wheel body which is of a round-disk shape and has several ratchets along the edge thereof. Axial holes are set at the wheel body to pass the reel. Connecting parts are disposed at the ends of the axial holes to protrude vertically from the end face of the ratchet wheel. The connecting parts could be embedded onto the handle or support of the tightener. The ratchet wheel for the tightener is equipped with the advantages such as firm connection and high reliability.

Abstract: A mode shift assembly for a transmission comprises has a first side coupled to a rotational input, a second side coupled to a rotational output, and an actuator. The actuator acts on the first side to move the first side between a first position in which the first and second engagement surfaces are disengaged and a second position. In the first position, rotation between the first and second sides is independent. In the second position, the first and second engagement surfaces are engaged such that rotation is transferred from the first side to the second side.

Abstract: A first clutch link for a driving clutch is capable of engaging another clutch link through interaction of a receptacle chamber and a projection. The first clutch link includes a contact surface and a counter surface, which are located on parallel planes. A hole is implemented behind the counter surface and is connected via a gap to the receptacle chamber. This hole extends parallel to the longitudinal axis of the driving clutch. A spring element is situated in the hole and has a contact area for contact on the other clutch link, which protrudes through the gap into the receptacle chamber. The hole has at least one opening, whose edge projects at least partially radially inward with respect to the hole in order to prevent the spring element from slipping through the opening of the hole.

Abstract: A diecast pocket plate or member having a sacrificial surface layer or portion is provided. The member is formed as a unitary die-casting from a die-casting alloy strengthened by an alloying material in a die-casting process. The diecast member includes a coupling face having a pocket which is sized and shaped to receive and nominally retain a locking member that moves in the pocket during an overrun condition of an engageable coupling assembly. The diecast member also includes a relatively hard base portion including particles of the strengthening alloying material of the die-casting alloy. The diecast member further includes a plurality of surface portions which define the pocket. At least one generally vertical surface portion of the surface portions is soft relative to the hard base portion and is substantially devoid of the particles of the alloying material so that the at least one generally vertical surface portion wears or deforms (i.e.

Abstract: The invention relates to a free-wheeling cage having a basic body, wherein the basic body includes a first cage ring and a second cage ring, which are arranged around a common axis and wherein cage webs extend axially between the two cage rings, whereby cage pockets are formed, wherein the basic body includes a lubricant reservoir which allows a metered dispensing of lubricant.

Abstract: The invention relates to a clutch having a first clutch part (2) and a second clutch part (3), wherein said two clutch parts (2, 3) are disposed pivotably relative to one another. In order to propose a clutch which in particular allows a precisely-positioned location fixing of the two clutch parts (2, 3) to one another, a clutch (1) is proposed by the invention which is characterized by a clutch element (4), which can be positioned rotationally-fixed relative to one of the two clutch parts (3), wherein the other of said two clutch parts (2) has a clutch member (6), which works together with a clutch member (7) carried by said clutch element (4).

Abstract: A shifting sleeve for selectively engaging a transmission gear in a vehicle transmission is provided. The transmission gear has at least one opening defined therein. The shifting sleeve comprises at least one tooth for selectively engaging the at least one opening defined in the transmission gear. The at least one tooth extends from the shifting sleeve body and has a first portion, a second portion and a third portion. The first portion has a top surface disposed at a first height and the second portion has a top surface disposed at a second height, the first height being greater than the second height. The third portion is disposed between the first and second portions, and has a top surface disposed at an angle and extending between the top surfaces of the first and second portions.

Abstract: A dog clutch gear is provided that can prevent stress concentration due to a machined edge from occurring in the dog clutch gear and that can prevent a cutting load from being intermittently applied to a cutting tool to lengthen the lifetime of the cutting tool. The dog clutch gear includes a rim portion formed with power transmission teeth on the outer circumference; a boss portion fitted to a rotating shaft; an annular connecting portion connecting the rim portion with the boss portion; and a dog member formed on a lateral surface of the annular connecting portion. A machined surface is formed on an axial end surface of the boss portion. A runout groove axially continuing from the dog member toward the axial end surface of the boss portion is formed at a joint portion between the boss portion and the dog member.

Abstract: In a method for influencing the traction force during shifting operations of a manual transmission in vehicles having at least two drive axles, the drive system of the first axle is activated in such a way that the interruptions in traction force occurring at the second axle during shifting operations of the manual transmission are at least partially compensated for.

Abstract: A form-fitting freewheel coupling, which has a first and second clamping track with latching structures, a gap space between the clamping tracks, and a clamping ring arranged in the gap space. The clamping ring has clamping tongues facing toward the first clamping track and clamping tongues facing toward the second clamping track. A drag ring is arranged in the gap space. The drag ring is pivotable to a limited extent, relative to the clamping ring and is spring-loaded against one of the clamping tracks and interacts with the clamping ring in such a way that, in the event of a rotation of the first clamping track relative to the second clamping track in the freewheel direction, the clamping ring is lifted fully from one of the clamping tracks, while the clamping tongues, which face away from the clamping track, protrude into the latching structures of the opposite clamping track.

Abstract: A dog-tooth-face interface for a vehicle includes a first clutch element that has a plurality of recesses distributed on a side of the first clutch element and around an axis through the first clutch element and a second clutch element that has a plurality of teeth configured to engage with the recesses and distributed on a side of the second clutch element adjacent the recesses. At least one of the first clutch element and the second clutch element is configured so as to rotate about the axis, and at least one of the first clutch element and second clutch element is configured so as to move along the axis to engage or disengage the first and second clutch elements. Moreover, the first clutch element has a substantially continuous wall surrounding the recesses, and the recesses have at least one corner relief portion configured to avoid contact with corners of the teeth.

Abstract: A sheet-metal synchronizer ring for a synchronizing device has a conical ring body, an outer toothing for blocking the axial movement of a sliding sleeve, and at least one indexing tab which is bent in the axial direction and limits the rotation of the synchronizer ring in a synchronizer hub. The indexing tab has a tab widened portion on at least one side.

Abstract: The invention relates to an assembly unit for synchronizing a manual gearbox, comprising first and second synchronizing rings (30) connected to each other, which is characterized in that the two synchronizing rings are connected to each other by means of a positive-locking connection (40, 42; 40, 48; 50).

Abstract: A releasable drive connection includes a ring including teeth angularly spaced about an axis, and grooves, each groove formed in an axial end of the ring and aligned angularly with a space between consecutive ring teeth; and a sleeve supported for axial movement, including first teeth angularly spaced about the axis, engageable with the ring teeth, each first tooth having a first length; and second teeth, each second tooth aligned with one of the first teeth, having an axial length shorter than the first length, and including a pointed end for engaging one of the grooves and permitting the first tooth to extend between and engage consecutive gear teeth.

Abstract: A clutch sleeve is provided for a shift clutch having a synchronizing device, which includes, but is not limited to a clutch body, which is connected in a rotationally-fixed manner to a gear wheel mounted so it is rotatable on a shaft and has coupling teeth and a friction cone as well as a synchronizing ring having a counter cone and blocking teeth, and which has shift teeth, the clutch sleeve having shift teeth, which are designed in such a manner that a first group of the shift teeth cooperates with the blocking teeth until a synchronized speed is reached and a second group of the shift teeth engages in the coupling teeth after the synchronized speed is reached.

Abstract: A synchromesh device for a transmission includes: a shaft; a sleeve; an idler gear; a gear piece; a synchronizer ring; a first spline, a second spline and a third spline, the first spline of the sleeve being engageable with each of the second spline of the gear piece and the third spline of the synchronizer ring; and a first chamfer, a second chamfer and a third chamfer, formed at one end of the first spline, one end of the second spline and one end of the third spline, respectively, for a spline-engagement and for a thrust-through operation. The first chamfer of the sleeve includes a small-diameter side thrusting through the third chamfer at the time of shifting and a large-diameter side thrusting through the second chamfer at the time of shifting. A chamfer angle of the large-diameter side is smaller than a chamfer angle of the small-diameter side.

Abstract: A power transmission mechanism having a dog clutch for freely connecting and disconnecting power transmission between a first rotor and a second rotor on a common rotational shaft. The dog clutch has a plurality of dog jaws in one of the rotors and has, in the other rotor, a plurality of recess portions or other dog jaws to which the former dog jaws can be engaged. Tapered surfaces are formed at an end face of each of the former dog jaws in the axial direction and each of wall surface portions formed between the recess portions or an end face of each of the latter dog jaws.

Abstract: A clutch assembly for a vehicle transmission includes a housing defined by a wall having an annular configuration circumscribing a clutch axis. The wall extends between an open end and a floor. The floor extends inwardly from the wall toward the clutch axis. A plurality of splines formed in the wall and each is spaced from the open end of the housing. A snap ring retains clutch plates in the housing. The open end of the wall is deformed inwardly toward the clutch axis defining a retainer for retaining the snap ring within the housing.

Abstract: A diecast pocket plate or coupling member including a pocket with a machined surface layer or portion, a method for making the coupling member and an overrunning clutch assembly including the coupling member are provided. The member is formed as a unitary diecasting from a die-casting material in a die-casting process. The diecast member includes a coupling face having at least one pocket which is sized and shaped to receive and retain a locking member that moves in the pocket during an overrun condition of the assembly. The pocket is defined by a plurality of surface portions including an angled, slightly positive surface portion which is machined vertical or slightly negative to improve performance of the assembly during the overrun condition.

Abstract: A sintered coupling ring (1) is described, comprising a ring of coupling teeth (2) which comprise relieved flanks (4) extending from wedge-shaped end faces (3) and, on the side opposite the wedge-shaped end faces (3), a stop (5) that protrudes radially beyond the tooth tip (6). In order to provide advantageous constructional conditions it is proposed that the stops (5) have a greater density than the remaining tooth tip (6).

Abstract: A diecast pocket plate or member having a sacrificial surface layer or portion is provided. The member is formed as a unitary die-casting from a die-casting alloy strengthened by an alloying material in a die-casting process. The diecast member includes a coupling face having a pocket which is sized and shaped to receive and nominally retain a locking member that moves in the pocket during an overrun condition of an engageable coupling assembly. The diecast member also includes a relatively hard base portion including particles of the strengthening alloying material of the die-casting alloy. The diecast member further includes a plurality of surface portions which define the pocket. At least one generally vertical surface portion of the surface portions is soft relative to the hard base portion and is substantially devoid of the particles of the alloying material so that the at least one generally vertical surface portion wears or deforms (i.e.

Abstract: A clutch mechanism of an outboard motor includes a forward gear and a reverse gear that are always driven in opposite directions by a drive shaft driven by a drive system, and a dog gear disposed around the output shaft. The forward gear, the reverse gear, and the dog gear are provided with a plurality of engaging projections and engaging recesses that can be engaged with each other, with the dog gear being engaged with either the forward gear or with the reverse gear by forceably moving the dog gear toward one side in the axial direction. A drive shaft has a drive gear and is driven by the drive system generating a maximum output power of about 300 ps or more, the forward gear and the reverse gear have input gears respectively which are always engaged with the drive gear, and the engaging projections and the engaging recesses are located radially inside of the input gears and disposed at least seven in a row along a circumference thereof.

Abstract: A torque responsive release clutch intended for a power nutrunner and comprises a driving clutch half (11) and a driven clutch half (10) coupled to each other for torque transfer by means of axially directed teeth (16, 17), wherein one of the clutch halves is axially movable between an engagement position and a release position against the action of a bias spring (13). Each one of the teeth (16) of one of the clutch halves (10) has a substantially prismatic shape and extends axially from a base portion (19) to a top portion (20) and comprises two surfaces (22, 23) which form between them a ridge (25). The base portion (19) of the tooth (16) has a radial extent from an inner diameter (d1 to an outer diameter (d2), and the ridge (25) extends from the inner diameter (d1 at the base portion (19) to the outer diameter (d2) at the top portion (20).

Abstract: A dog clutch gear is provided that can prevent stress concentration due to a machined edge from occurring in the dog clutch gear and that can prevent a cutting load from being intermittently applied to a cutting tool to lengthen the lifetime of the cutting tool. The dog clutch gear includes a rim portion formed with power transmission teeth on the outer circumference; a boss portion fitted to a rotating shaft; an annular connecting portion connecting the rim portion with the boss portion; and a dog member formed on a lateral surface of the annular connecting portion. A machined surface is formed on an axial end surface of the boss portion. A runout groove axially continuing from the dog member toward the axial end surface of the boss portion is formed at a joint portion between the boss portion and the dog member.

Abstract: A system is provided for preventing gear hopout in a tooth clutch in a vehicle transmission, the tooth clutch including an engaging sleeve having sleeve clutch teeth. The tangent function for at least one of driving back-taper angle and braking back-taper angle is larger than the average value of clutch coefficient of friction and spline coefficient of friction multiplied by the sum of unity and the ratio of clutch teeth pitch diameter and spline teeth pitch diameter.

Abstract: A sheet-metal synchronizer ring for a synchronizing device has a conical ring body, an outer toothing for blocking the axial movement of a sliding sleeve, and at least one indexing tab which is bent in the axial direction and limits the rotation of the synchronizer ring in a synchronizer hub. The indexing tab has a tab widened portion on at least one side.

Abstract: A quick disconnect coupling including a first hub, a shaft fixedly connected to the first hub, the shaft being non-round in cross-section, and a second hub having a non-round recess extending therethrough, the non-round recess being sized to closely receive the shaft such that the second hub is capable of sliding along the shaft and is prevented from rotating about the shaft, wherein rotation of the first hub results in corresponding rotation of the second hub.

Abstract: A sintered clutch ring (1) is described, comprising a rim of clutch teeth (2) which comprise wedge-like face surfaces (3, 4) intersecting in an axial plane and flanks (5) sloping downwardly under an angle of inclination from the tooth back (6) against the tooth root, with the flanks (5) being relieved starting from a re-entrant, axially normal shoulder (7). In order to provide advantageous conditions for press forming the flank reliefs it is proposed that the planes of intersection between the wedge-like face surfaces (3, 4) extend outside of the center of the teeth and that the mutually axially offset shoulders (7) of the two flanks (5) of the clutch teeth (2) separate the relieved flanks (5) from a paraxial flank portion (8) which is substantially triangular and is adjacent to the face surfaces (3, 4).

Abstract: A coupling element, for example a coupling sleeve (1), having coupling teeth (2) which, over a part (2a) of their length, have a gradually diminishing cross-sectional profile, a so-called back rake. Over the part, the coupling teeth have a portion (7b) nearest the tooth root having a first pressure angle, which portion connects to a portion (7b) extending to the tooth tip and having a greater pressure angle than the former portion.

Abstract: A dog clutch includes a first engagement face and a second engagement face provided on a surface of a driving rotor and a driven rotor with the two surfaces being opposite each other. The first engagement face engaging with its counterpart when a driving force of the driving members is generated. The second engagement face engaging with its counterpart when the driving member receives the driving force from the driven member. The strength of the engagement portion is balanced reflecting the operational torque changing as a power transmission direction changes. A projection drawing to a plane perpendicular to a rotational axis of a driving rotor and of a driven rotor, the inward extension line of the first engagement face passes through a position offset from the position representing the rotational axis, and the inward extension line of the second engagement face passes through the position representing the rotational axis.

Abstract: The present invention relates to an insert element (3) for transmitting a force for a camshaft adjustment system. The insert element (3) has a first region (1) with an end surface (4) for receiving the force, and a second region (2) for conducting away the force. The end surface (4) is arranged in such a manner that it has, by means of a locking element (7), at least one force transmission point for receiving the force. The second region (2) is arranged in such a manner that it has, by means of a stator element (6), a force transmission surface for conducting away the force.

Abstract: There is disclosed herein a one-way drive device including a first member mounted for rotation about a given axis and defining (i) a first planar surface normal to the axis, and (ii) a first shoulder within the first surface. The device also includes a second member mounted for rotation about the same given axis and defining (i) a second planar surface, which is positioned in close proximity to and in confronting relationship with said first surface, and (ii) a second shoulder within the second surface.

Abstract: A treatment head of a tool machine and a member are relatively angularly positioned by an angularly indexable mount having a first coupling having first and second elements displaceable relative to each other, each formed with a respective array of a respective predetermined number of teeth, and respectively connected to the member and the treatment head. The number of teeth of the first-coupling first element varies by more than one from the number of teeth of the first-coupling second element. A second coupling meshable with the first coupling has first and second elements engageable with the first and second elements of the first coupling, fixed relative to each other, and each formed with a respective array of a respective predetermined number of teeth. The number of teeth of the second-coupling first element varies by more than one from the number of teeth of the second-coupling second element.

Abstract: A method for manufacturing a gear and a gear for a transmission, in which an outer peripheral gear part formed on an outer peripheral wall surface of a main body of a gear, an annularly-shaped concave portion annularly formed at a radial inner part on at least one axial end surface of the main body of the gear within the outer peripheral gear part thereof, a dog gear part formed on an outside peripheral wall surface at a central part formed on the annularly-shaped concave portion, and a taper part comprising an inner corn for being synchro formed on an inside peripheral wall surface formed on the annularly-shaped concave portion, are formed integrally by forging.

Abstract: A speed change gear with dog clutch pawls projected on a side surface of a gear body having a speed change gear part on an outer peripheral surface thereof, and a method and a device of manufacturing the same, in which the dog clutch pawls are provided with back tapers on at least engaging surface thereof, and the dog clutch pawls with back tapers and the change gear part are integrally molded by forging.

Abstract: One-part stabilizers are designed for road traffic only or for off-road travel only. Two-part stabilizers with a shiftable clutch have drawbacks in terms of quality and safety. A clutch is therefore presented, whose radial carriers (14, 16) are located on the same plane and which are fixed without clearance via a shiftable and axially displaceable locking piston (17) with locking elements (23) or are released over a predetermined pivot angle.

Abstract: An overrunning clutch includes a cam plate formed with cams angularly spaced about a central axis, and a rocker plate that includes pockets angularly spaced about the central axis. Each pocket includes a first concave surface having a center located within the pocket and through which a pivot axis passes. Each pocket contains a rocker that includes a first convex surface complementary to, and at least partially surrounded by the first concave surface. Springs, supported on the rocker plate, each urge a rocker to pivot about the pivot axis toward the cam plate.

Abstract: A first dog clutch member is coupled with a rotation transmitting member rotatably mounted on a power transmission shaft with a relative rotation clearance ?. A second dog clutch member is slidably mounted on the power transmission shaft to be engageable/disengageable with/from the first dog clutch member. A damper spring is interposed between the rotation transmitting member and the first dog clutch member. First dog teeth and second dog teeth, which are engaged/disengaged with/from each other by an axial displacement of the second dog clutch member, are formed in the first dog clutch member and the second dog clutch member, respectively. A chamfer is made in each end portion of the respective first dog teeth and each end portion of the respective second dog teeth, which are opposed to each other, so as to guide the second dog teeth to a position to engage with the first dog teeth.

Abstract: A coupling system including at least two sub-units, one of which is pre-assembled on the engine side of a motor vehicle drive train, namely on the output shaft of the engine, and the other sub-unit is pre-assembled on the transmission side of the drive train. The pre-assembled sub-units each include respective interengaging teeth to provide a positive drive connection, and the teeth are biased toward each other to reduce circumferential play and thereby reduce noise that would be generated during operation of the drive train.

Abstract: A sintered clutch ring (1) is described, comprising a rim of clutch teeth (2) which comprise wedge-like face surfaces (3, 4) intersecting in an axial plane and flanks (5) sloping downwardly under an angle of inclination from the tooth back (6) against the tooth root, with the flanks (5) being relieved starting from a re-entrant, axially normal shoulder (7). In order to provide advantageous conditions for press forming the flank reliefs it is proposed that the planes of intersection between the wedge-like face surfaces (3, 4) extend outside of the center of the teeth and that the mutually axially offset shoulders (7) of the two flanks (5) of the clutch teeth (2) separate the relieved flanks (5) from a paraxial flank portion (8) which is substantially triangular and is adjacent to the face surfaces (3, 4).

Abstract: A synchronizer for a transmission including: a synchronizer hub; a synchronizer sleeve slidable thereon to engage with a clutch gear, which is provided with sleeve spline teeth having sleeve chamfers; and a synchro ring having a plurality of pairs of synchro ring spline teeth each having a synchro ring chamfer for receiving one of the sleeve chamfers. The synchro ring chamfer has a leading edge offset from the center of each synchro ring spline tooth, so that a distance between the leading edges becomes greater than a distance between the centers of the synchro ring spline teeth in each of the pairs of the synchro ring spline teeth. Moreover, the sleeve spline teeth are provided on the synchronizer sleeve only in angular positions between the synchro ring spline teeth of each of the pairs.

Abstract: In a clutch unit, an engagement of a dog clutch can be restricted until a revolution of an input shaft and the revolution of an output shaft correspond to each other so as to be suitable for the engagement. The engagement can be effected when the revolution of the input shaft and the revolution of the output shaft have corresponded so as to be suitable for the engagement. Accordingly, the revolution of the input shaft and the revolution of the output shaft are speedily synchronized, and engagement shocks of the dog clutch can be accurately suppressed. Hence, it is possible to reliably transmit the torque to be transmitted from the driving source to the wheel side through the reduction mechanism.

Abstract: This invention discloses a bicycle ratchet bushing, comprising a bushing for coupling to a connecting axle rod to drive the bicycle wheel to rotate, a pawl ring disposed on the inner side of the bushing, a plurality of pawls interdentally dispersed around the outer periphery of the ratchet ring, a resilient ring surrounding each pawl, such that the inner end of the pawl is a pivotal circular turning end, and the outer end is a moving end capable of opening outwards and retracting, and a pawl ring being sheathed outside the ratchet wheel, such that a buffer space is designed at the internal diameter of the pawl ring to prevent noise production from friction between the resilient ring and the pawl ring of the bushing.

Abstract: A sliding collar has claw internal toothing and teeth projecting from at least one of the end surfaces. The individual teeth have lateral surfaces configured as lateral surfaces of a cone segment or as lateral surfaces of a cone segment and one or more truncated-cone segments. The novel geometry of the lateral surfaces which extend outward from the root circle results in both manufacturing technology and functional advantages over sliding collars with known tooth geometries.

Abstract: A clutch gear having a boss part with a spline which is formed on an outer peripheral surface of the boss part formed on an axial end surface of the clutch gear having jaw clutch teeth formed on an outer peripheral surface thereof, in which the boss part, with the spline formed on outer peripheral surface thereof, is formed integrally and coaxially with the clutch gear having the jaw clutch teeth formed on the outer peripheral surface thereof by forging, the diameter of the boss part is shorter than that of the clutch gear, and an end part of an effective portion of the spline comes to at least an end surface of the clutch gear.

Abstract: A rotor ring and an armature for use in a toothed electromagnetic clutch or a toothed electromagnetic clutch brake. A method of manufacturing rotor rings and armatures used in toothed electromagnetic clutch or a toothed electromagnetic clutch brakes.