IBLS Coupler and Safety Chain Standards: Difference between revisions
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** Right hook is a captive hook | ** Right hook is a captive hook | ||
** Left hook is an open hook | ** Left hook is an open hook | ||
== Tidbits From Chaski == | |||
From http://www.chaski.com/homemachinist | |||
ccvstmr | |||
: ILS standard calls for two (2) 1/4" hooks at 2.5" distance from the centerline of the car. I set the hooks at 3" because I don't like to "crowd" the coupler. Eyebolts with 1/4x20 thread and various length shanks can be purchased at most hardware stores. The left hook is twisted open while the right hook is opened...the chain inserted...and the hook closed to make the chain captive. Chains are 6" +/- 1". Chain material is 1/8" x 1" welded link...although 3/16" x 1" link would also do. The chain must fit over the chain hooks. Wire-wrap chain is not acceptable either. | |||
: One point that is often overlooked...is the method in which the the chain hooks are attached to the loco/car body. A screw-in eyebolt hook is not acceptable, nor is a hook attached to an endsill that is nailed to the end of the car. In other words, the hook attachment to the car body must be strong enough to withstand the forces transmitted through the chain(s) during a derailment. It is better to destroy the hook (straighten it out) instead of destroying your rolling stock or let your cars get away and be stopped by the next train that follows. | |||
: Another item to watch for...always make sure that safety chains are hooked at both ends...even if it's the last car of the train. A dragging chain will easily catch a turnout frog and/or heel block if you're not careful. The result...time to replace the chain hooks. Hope this helps. | |||
== References == | == References == | ||
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* [http://www.fingerlakeslivesteamers.org/newheel.htm IBLS Wheel Standards - Finger Lakes Live Steamers] | * [http://www.fingerlakeslivesteamers.org/newheel.htm IBLS Wheel Standards - Finger Lakes Live Steamers] | ||
* [http://www.ridgelivesteamers.org/misc/iblswheelstandards.pdf IBLS Wheel Standards - Ridge Live Steamers] | * [http://www.ridgelivesteamers.org/misc/iblswheelstandards.pdf IBLS Wheel Standards - Ridge Live Steamers] | ||
* [http://www.chaski.com/homemachinist/viewtopic.php?f=8&t=21302&view=next#p20139 Safety Chains - ccvstmr - Chaski] | |||
Revision as of 21:18, 9 February 2013
Layout
| Scale | Gauge | Couple Height (CH) | Chain Offset (CO) | Link Size | Chain Length |
| 3/4" | 3-1/2" | 2-1/4 | |||
| 1" | 4-3/4" | 2-7/8" | |||
| 1-1/2" | 7-1/4" | 4-7/16" +0" -3/16" | 2-1/2" +/- 1/4" | 1/8" welded | 6" +/- 1" |
| 1-1/2" | 7-1/2" | 4-7/16" +0" -3/16" | 2-1/2" +/- 1/4" | 1/8" welded | 6" +/- 1" |
| 1.6" | 7-1/2" | 4-7/16" +0 -3/16" | 2-1/2" +/- 1/4" | 1/8" welded | 6" +/- 1" |
- Safety Chain Data
- Right hook is a captive hook
- Left hook is an open hook
Tidbits From Chaski
From http://www.chaski.com/homemachinist
ccvstmr
- ILS standard calls for two (2) 1/4" hooks at 2.5" distance from the centerline of the car. I set the hooks at 3" because I don't like to "crowd" the coupler. Eyebolts with 1/4x20 thread and various length shanks can be purchased at most hardware stores. The left hook is twisted open while the right hook is opened...the chain inserted...and the hook closed to make the chain captive. Chains are 6" +/- 1". Chain material is 1/8" x 1" welded link...although 3/16" x 1" link would also do. The chain must fit over the chain hooks. Wire-wrap chain is not acceptable either.
- One point that is often overlooked...is the method in which the the chain hooks are attached to the loco/car body. A screw-in eyebolt hook is not acceptable, nor is a hook attached to an endsill that is nailed to the end of the car. In other words, the hook attachment to the car body must be strong enough to withstand the forces transmitted through the chain(s) during a derailment. It is better to destroy the hook (straighten it out) instead of destroying your rolling stock or let your cars get away and be stopped by the next train that follows.
- Another item to watch for...always make sure that safety chains are hooked at both ends...even if it's the last car of the train. A dragging chain will easily catch a turnout frog and/or heel block if you're not careful. The result...time to replace the chain hooks. Hope this helps.