Bow trammels are an accessory used in conjunction with commercially available trammel balls (not included) for comparative measurement of RTJ ring grooves when being machined back to specification.
 Allows measuring of RTJ grooves with Internal mount flange facer in situ.
 Supplied with both 12mm and 1⁄2 inch diameter rod sets to suit different brand trammel
balls.
 Bow is extendable in 12.5mm increments up to a recommended maximum of 100mm extension to cover the full range of ring sizes up to the max PD approx. 1070mm depending on type/brand of trammel balls used.
 Max machine hub diameter clearance of 250mm.
 CNC machined from aluminium for reduced weight and supplied with stainless steel rods and screws.
 Packaged in a waterproof plastic hard case.
 3mm and 4mm Allen keys included.
 Wholly Australian made in Darwin NT.

On special, $300 off, reduced price to clear,  3 sets available.

 Fully retracted position                                                                                                 

 Fully extended position

In hand for scale

In use with Mirage 610i internal flange facing machine.

 Balls can be positioned inside or outside the bow as required.