Verticle Shaft Pneumatic Clamp Inquiery

[84malibu]

I am looking for a pneumatic clamping device for a verticle shaft of dia 3" and carrying about 4 tons. Does anyone have an idea where I can find such a device? I just need to lock the shaft in position while maintinance is performed.

 

[unclesyd]

We modified this type device to hold shafts stationary for certain operations. There all manner variations on this design.

This is not a classified as a man-safe locking device

http://www.converteraccessory.com/products/coresupport/main.html#shaftschucks