CHAINS
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Geoff Dale
- Posts: 56
- Joined: 17 Jan 2007, 2:30pm
- Location: West/South Yorks Boundry
CHAINS
Could someone explain please the difference with a `standard` to a `cross step version` of otherwise the same spec. chain ?
This is referring to the process used in forming the rivet. The "cross-step gives a sronger rivet than the standard "rolled" Here is an answer to the question from Srams production manager.
"1)Standard Rolled Rivet: The fastest, cheapest, and least strong riveting. What happens here is that the chain is pulled thru a set of round dies that deform the rivets. This is used on single speed non-derailleur bikes. It also has the tallest rivets, and receives the least amount of side loading. So it's weaker, but in it's usage pretty darn strong. 2)Step Rolled Rivets: This is also a rolled rivet, but much more precision and slightly slower in processing speed. This type of rivet is shorter/flatter and is used on our basic derailleur chains. It's has about 50% more Push Pin Power than the Standard Rolled Rivet process. It's about 1500NM's (sic). The step riveting is moving more material than the standard roll riveting. 3)Cross Step Rolled/Stamped Rivets: Is a double riveting process that rolls the step rivet, then hits it again to displace more material. It's one of our strongest types of riveting at over 2000NM's. With all the above methods of riveting, the hole in the side of the plate is straight with no draft/radius. So the deformation of the rivet flows over the outside of the link itself. 4)Cylindrical Riveting (Hollow Pin type): With this type of riveting, the material is displaced into a chamfered/tapered hole and the thickness of the plate plays an important roll of the Push Pin Power. "
"1)Standard Rolled Rivet: The fastest, cheapest, and least strong riveting. What happens here is that the chain is pulled thru a set of round dies that deform the rivets. This is used on single speed non-derailleur bikes. It also has the tallest rivets, and receives the least amount of side loading. So it's weaker, but in it's usage pretty darn strong. 2)Step Rolled Rivets: This is also a rolled rivet, but much more precision and slightly slower in processing speed. This type of rivet is shorter/flatter and is used on our basic derailleur chains. It's has about 50% more Push Pin Power than the Standard Rolled Rivet process. It's about 1500NM's (sic). The step riveting is moving more material than the standard roll riveting. 3)Cross Step Rolled/Stamped Rivets: Is a double riveting process that rolls the step rivet, then hits it again to displace more material. It's one of our strongest types of riveting at over 2000NM's. With all the above methods of riveting, the hole in the side of the plate is straight with no draft/radius. So the deformation of the rivet flows over the outside of the link itself. 4)Cylindrical Riveting (Hollow Pin type): With this type of riveting, the material is displaced into a chamfered/tapered hole and the thickness of the plate plays an important roll of the Push Pin Power. "