Chain Tool
This custom-designed #25 Chain Tool (REV-41-1442) also commonly referred to as a "chain break" or "chain breaker", allows teams to easily break and re-assemble #25 Chain (REV-41-1365). The mandrel is used to push out the chain pin. If using Master Links (REV-41-1366), the pin can be completely removed, but the depth guide screw allows the option of partially pressing out the pin and then re-assembling without master links.
- 1 Chain tool block
- 2 set screw mandrels
- 1 depth guide screw
- 1 cup point set screw
- 1 4mm Allen Wrench
Before using the #25 Chain Tool for the first time, remove the thread pin screw and use WD-40 or compressed air to remove any shavings left in the tool from the manufacturing process. This will ensure the chain break works smoothly and efficiently breaks your chain. Reinstall the thread pin screw. Once this is complete, the chain break is ready for use.
In almost all applications, chain links are connected to form a loop. While chain can sometimes be purchased in specific length loops, it is more common and economical to buy chain by the foot and make custom loop lengths to fit the application. It’s recommend to use a specialized tool, a chain breaker, to cut chain into desired lengths to prevent accidental damage.
Chain breakers do not actually cut the chain, instead they are used to press out the pins from an outer link. After the pins have been removed the chain can be separated leaving inner links on both ends of the break.
Chain Tools have two methods for resetting chain. Using Master Links and resetting the chain pin. Resetting the pin is results in a stronger chain than using a master link.
Image | Steps |
|---|---|
 | Step 1: Unscrew the pin screw and compression screw such that they are flush with the chain channel. |
 | Step 2: Insert #25 chain (REV-41-1365) into the chain channel and align the desired link between the two vertical pins in the channel. |
 | Step 3: Next, secure the chain in place with the compression screw. Tighten until the chain cannot shift within the channel. |
 | Step 4: With the chain in place it can now be broken. Turn the Allen Key until the pin is entirely removed from the chain. Make sure to have a Master Link (REV-41-1366) on hand. You must have one empty inside link on either side; two plates will not work. The picture shows an example of this step at completion. |
Remove the cup point set screw before breaking the chain. This will allow for the pin to completely remove itself from the chain.
Image | Steps |
|---|---|
 | Step 5: Place the Master Link into both links. Next, take the plate and put it over the master link. Use pliers and the included clip to lock the Master Link into place. |
 | Step 6: Done! Chain is ready for use! |
Image | Steps |
|---|---|
 | Step 1: Unscrew the pin screw and compression screw such that they are flush with the chain channel. |
 | Step 2: Insert #25 Chain (REV-41-1365) into the chain channel and align the desired link between the two vertical pins in the channel. |
 | Step 3: Next, secure the chain in place with the compression screw. Tighten until the chain cannot shift within the channel. |
In the next step be careful to not overly push the pin out as it will be impossible to put it back in, and a master link will be needed.
Image | Steps |
|---|---|
 | Step 4: Screw the pin screw down until the pin almost touches the cup point set screw. The user should stop pushing the pin out before it leaves the back plate of the outer link. Considerable pressure will be felt before the pin comes all the way out. Removing the chain from the tool to check if the pin is fully unseated from the bushing is recommended. The final result will be the pin still partially connected to the chain, as shown in the photo. |
 | Step 5: Put the link into the plate and place the extruding link next to the compression screw in the chain channel. |
 | Step 6: Turn the compression screw until the pin is fully seated back into the chain channel. |
 | Step 7: Done! Chain is ready for use! |
Last modified 3mo ago