Which Co-Ax gauge?

[JonK]

I am looking at getting a concentricity gauge and wondered what forum members thought was best. Bersin, Bonanza, RCBS, or Sinclair?

 

[fdshuster]

JonK: I have both the RCBS and Sinclair. Both get the job done. The V-blocks on the RCBS are wearing from the rolling contact with the case head, and the case sometimes will "jump" off the rounded bearings on the Sinclair,, may be operator error?). A friend recently bought the Sinclair and was not happy with the "made in China" dial indicator: said he will send it back and use a "Starret" that he has. Very worth while tools though, sometimes telling us more than we want to know.

 

[mikecr]

I've had and sold off various inventions of runout checkers.. Only Sinclair's offering proved to accurately show TIR.
The black one, with the ball bearings.

Sinclair's IS the best.

 

[JonK]

Thanks for the input. I just bought a Bersin on eBay so I'll plan to let you know how I like it.

 

[justpete]

Re: Chinese dial indicators - check out longislandindicators.com, you might be surprised at how pervasive they are even in the high dollar units.

FWIW,
Pete