Sourced directly from Hardinge- the only authorized provider of Bridgeport knee mills, parts and service
Clock spring assembly counter balance for j and 2j head.
Most Helpful Customer Reviews
These things last about 3 to 4 years in 8/5 duty. This part is OEM quality and supplied by Hardinge, Bridgeport's OEM parts supplier. I have put these on Bridgeport, SWC Prototrak, and Sharp mills. Remember to wind the spring approximately 1 1/2 turns beyond the idle state and you will have enough preload to counterbalance most tool holders and chucks. It doesn't hurt to first clean this assembly and hit it with some light oil before installation.
it fit well but spring a little week to return quill automatically, but strong enough it won't let the quill drop. better than dealing with the broken one.
did not work as it should have . ordered one off e bay it worked great .
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