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Has Anyone Removed & Replaced the VPI Arm

I have a Superscoutmaster with a Signature 9 inch arm. I am returning the arm for the 10.5i to VPI under an exchange program. VPI promised instructions with the new arm, but I was wondering if anyone has done it. I have replaced arms before, but the current arm sits on the very thick plinth of the SSM. There is no attaching bolt..only a very deep hole from under the arm.
128x128stringreen

Showing 2 responses by dougdeacon

dougdeacon
3,338 posts
 
Stevecham,

Good question, but the answer's easy to discern from product photos.

The JMW 9 and 9 Sig's mounting shaft is located directly beneath the arm's pivot point.

The mounting shaft for higher model JMW's is located beneath the VTA tower, not beneath the arm bearings. This offset moves the pivot point farther from the spindle.

In addition, the photos make it look like you could rotate these arms in the mounting hole. This would let you fine tune mounting distance before locking it down, which would also give you the opportunity to try different alignment schemes.

I've never actually worked with a JMW so I can't really answer Stringreen. Are you sure there's no set screw through the side of the plinth? Maybe just a small hole (or two) for a hex key? I'm just speculating....
dougdeacon
3,338 posts
 
Stringreen,

From the photos it looks like you have a mounting collar screwed down to the plinth. There's a set screw (or two?) going through that collar from the side. Loosening the set screw(s) lets the arm slide up and down, right? Doesn't it just slide right out?

You could always call VPI. They probably know! ;-)

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