Abstract: A method produces a synchronizer ring for a synchronizing device in which blocking teeth extending radially outwards or radially inwards are produced by a forging method. The blocking teeth each have a flank portion and two oblique top flanks merging into a common top ridge. A depression is formed on the rear side of a blocking tooth opposite the top ridge.

Abstract: A synchronizer ring is made of steel and has a main body with a conical friction surface. A toothing and at least one blocking body project radially outward from the main body. The blocking body has an engagement section extending in the axial direction. The engagement section has a first edge, which runs approximately parallel to a first end face of the main body and has a first width extending in the circumferential direction, and two mutually opposite second edges extending from the first edge. To improve the durability of the synchronizer ring, the second edges have a convex curvature in a plan view of the engagement section. A second width extending in the circumferential direction between the second edges is greater than the first width at a depth spaced apart from the first edge.

Abstract: A synchronizer ring for a synchronization unit of a manual transmission is produced from a sheet metal material and has a conical friction surface on the inner side thereof and has a device for radial centering of the synchronizer ring on the outer side thereof. The device for radial centering includes a plurality of separate arc-shaped centering collar portions spaced apart from one another in the circumferential direction.

Abstract: A method for producing a synchronizer ring includes providing a ring body made of metal and having a conical connecting surface, providing a friction ring, corresponding to the connecting surface, made of a composite material of carbon fiber bound with a resin, adhesively bonding the friction ring to the connecting surface, and pyrolyzing exclusively an outer layer of the friction ring which is remote from the connecting surface.

Abstract: A nickel-free white CuZn alloy. The alloy includes the following alloying elements: from 63.0 to 67.0% of Cu, from 0.01 to 0.15% of Pb, from 0.01 to 0.2% of Fe, from 1.3 to 2.5% of Al, from 12.0 to 15.0% of Mn, a balance of Zn, and unavoidable impurities.

Abstract: A copper-zinc alloy that is particularly suitable as a material for a horseshoe includes at least the following components, in percent by weight: 59-73% of copper, 2.7-8.5% of manganese, 1.5-6.3% of aluminum, 0.2-4% of silicon, 0.2-3% of iron, 0-2% of lead, 0-2% of nickel, 0-0.4% of tin, balance zinc and unavoidable impurities.

Abstract: A novel copper-zinc alloy is particularly suited for a valve guide. The copper-zinc alloy is formed of 59 to 73% copper, 3.1 to 8.3% manganese, 2 to 6% aluminum, 0.5 to 2% silicon, 0.2 to 1.2% iron, and the remainder zinc and inevitable impurities.

Abstract: A novel copper-zinc alloy is particularly suited for a valve guide. The copper-zinc alloy contains 59 to 73% copper, 2.7 to 8.3% manganese, 1.5 to 6% aluminum, 0.2 to 4% silicon, 0.2 to 3% iron, 0 to 2% lead, 0 to 2% nickel, 0 to 0.2% tin, remainder zinc and inevitable impurities.

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 a method for producing a component of a synchronization device for manual transmissions, in particular a synchronizer ring (1, 2, 3), wherein a round blank produced from metal is formed in a plurality of forming steps. In order to simplify the production process, it is proposed according to the invention that at least one of the forming steps is a hot forming step in which the round blank is partially heated to a temperature of more than 600° C. and is then formed in the partially heated forming portion.

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 friction layer carrier device has a basic element with a basic element contact surface and a friction layer lining body with a lining contact surface. The friction layer lining body is fastened to the basic element in such a way that the basic element contact surface and the lining contact surface are joined together in adhesive regions via an adhesive. At least one depression region, which allows degassing of the adhesive, is introduced into the basic element contact surface and/or into the lining contact surface.

Abstract: A synchronizer ring (10) having a support body (5), a conical friction surface (9), and a friction layer (14) of a material including carbon fibers applied to the friction surface (9). The material is a compacted carbon fiber reinforced plastic. A synchronizer ring of this type has a longer service life than those of the prior art, on account of the improved dimensional stability of the friction layer, and is inexpensive. Also disclosed is a method for producing the above-described synchronizer ring.

Abstract: A Cu—Zn—Si alloy includes, in % by weight, 70 to 80% of copper, 1 to 5% of silicon, to 0.5% of boron, up to 0.2% of phosphorus and/or up to 0.2% of arsenic, a remainder of zinc, plus inevitable impurities. Products using the alloy and processes for producing the alloy are also provided. The alloy is distinguished by an improved resistance to oxidation and by uniform mechanical properties.

Abstract: A wear-resistant brass alloy is ideally suited for manufacturing a synchronizing ring for use in couplings, brakes, transmissions, etc. The brass alloy contains 55-68% by weight of copper, 0-6% by weight of aluminium, 2-14% by weight of manganese, 0.5-3% by weight of phosphorus, 0-1% by weight of lead, unavoidable impurities and the rest zinc.

Abstract: A synchronizer ring (10) having a support body (5), a conical friction surface (9), and a friction layer (14) of a material including carbon fibers applied to the friction surface (9). The material is a compacted carbon fiber reinforced plastic. A synchronizer ring of this type has a longer service life than those of the prior art, on account of the improved dimensional stability of the friction layer, and is inexpensive. Also disclosed is a method for producing the above-described synchronizer ring.

Abstract: A copper-zinc alloy is particularly suitable for forming synchronizer rings. The novel alloy contains 55 to 75 wt. % copper, 0.1 to 8 wt. % aluminum, 0.3 to 3.5 wt. % iron, 0.5 to 8 wt. % manganese, 0 to less than 5 wt. % nickel, 0 to less than 0.1 wt. % lead, 0 to 3 wt. % tin, 0.3 to 5 wt. % silicon, 0 to less than 0.1 wt. % cobalt, 0 to less than 0.05 wt. % titanium, 0 to less than 0.02 phosphorus, unavoidable impurities and the remainder zinc.

Abstract: A copper zinc alloy that is used as a material for a sliding bearing wherein the alloy comprises 59-73% copper, 2.7-8.5% manganese, 1.5-6.3% aluminum, 0.2-4% silicon, 0.2-3% iron, 0-2% lead, 0-2% nickel, 0-0.4% tin, residual zinc and unavoidable impurities.