Is this how the 2J Bridgeport works? Machintek??

[Stillearnn]

Hey Guys,

Trying to figure how the motor Vari-speed pulley(moveable one) on my 2hp series 1 bridgeport head can go "up" the motor shaft.

The assembly is as follows; motor is mounted vertically, shaft pointing down. On this shaft next comes the stationary pulley locked into position by 1 setscrew. Next the adjustable pulley(variable pulley assy.) which is free to slide up/down on the motor shaft. This pully assy. is comprised of a one sided pulley with a good size boss on the lower side. Over the boss is a large spring which is compressed to half its length, and retained by a close fitting plate (somewhat hard). The plate is secured by 2 #10-32 socket head cap screws. Last is a retaining ring.

Is the Key the close fitting plate?? Does it wiggle,wriggle or squirm just enough that it wants to continuely move towards the fixed pulley ?

Yes LOA, Of course I filed out the close fitting hole in the wiggle plate. New pulley assy did not seem to fit, and even looked like it would scrape up the new motor shaft as it slid.

So please if anyone has the answer, Please let me know.

Thanks. And as always still learn N

[Stillearnn]

Ok I've got it solved. All it took is a call to Barry Walker @ H&W Machine Repair and Rebuilding, Inc. A very helpful fellow and a nice guy as well. Those 2 10-32 screws are to be removed after the motor is installed.

Now it all makes sense, with the screws removed the spring pushes the retaining plate against the shafts retaining ring, this in turn pushs against the moveable sheave toward the fixed sheave.

As its been apart about a month I had forgotten about installing those screws to compress the spring proir to removing the motor from the mill.
The new variable speed assy came with screws compressing its spring, so they looked just the same when I installed it last night.

Well maybe this with help someone with similar problem LOL