Spindle belts

[wcarrothers1]

Have a series 1 V2E3 mill. Seems like it could probably use a new spindle belt since the one in feels like it's got some pretty good flat spots (from the machine sitting.

Anyone know a mc master car cross (part number) for the belt used or where I can get one. Probably would be one of the things I could do / change while it's in pieces getting it home.

Looks like it will probably not be an easy job since it's got the power draw bar and all on this machine.. But who knows.

Thanks

b

[machintek]

In theory the angle is slightly different. That is what I was told.
Bridgeport part number 11182120.
Usually the motor adjustable vari drive bushings give out first. If not attended to, they will destroy the motor shaft. Very old machines had thin black plastic inserts epoxied in. Newer machines have the thicker aqua colored inserts which are not replaceable. When rebuilding a head, I use factory replacement varidrives, because I cannot glue the inserts back in so there is no wobble and it is in balance. I usually do a top end kit of the bearings, belts and drives so that that part of the machine will be good for another 6 years or so.

George

[wcarrothers1]

So based on that and what I hear sounds like a belt that probably has a pretty good flat spot in it sounds like you are saying rebuild time (vs swap belt time?) I really have not run the spindle more then a few seconds so perahps it would work it's way out?

b/

[machintek]

Belt could have taken a "set".
The vari drive worn out noise is more mechanical like a bad bearing. Try running it before investing time and money in a tear down.

George

[wcarrothers1]

ya I'm going to run it. The longer I run it the better it's sounding really.. No sense digging into something and changing it when it might last me for years.

Might not sound as great as it could but for 24 years old I'd say it sounds fine. For sure quieter then my geared head round pole mill seems to have an area where its a bit louder in the rpm range (for some reason my spindle speed readout on the boss 10 does not seem to be working 100% so I can't say what the exact speed is where it sounds the worst..

In any case the head is off the machine for the trip home so it will be a while before I play again.

While you are reading this thread George... I talked about how I jammed the X jib.. Well you know how the jib adjusts with that screw and there is a tooth that the washer on that screw sits so it can pull the jib out or in. Anyway I found why it got sucked in. that tooth cracked (found the piece in the fluid catch bin when I removed it today Don't ask me how).. But it appears as if it may have been welded back on and that cracked.

Anyway is there any rule far as jibs belong to the machine for life or are fitted to that machine or can / should I order a new one rather then welding this one again (I've got a welder and such).. Just wondering.

Thanks..

Hopefully it will be home soon. Turns out getting the head off the machine was not that hard.

[machintek]

There are 2 ways to order a gib. You can get a raw gib, or you can purchased one ground and scraped with oil grooves in it. There is a service bulletin as how to order it giving the needed thin and thick dimensions which must fit the angle of the gib. If I run across the service bulletin, I will attach it in a seperate post.

George

[wcarrothers1]

Ok... I'll probably weld the end back on my self and make a bracke for the alternate side that can control it from getting sucked in incase it cracks again. At least for now I suppose.. Still in the process of moving it home so be a while before i get things going.\