Sold: Bergeon 1766-31 Universal Runner
Sold: A used Bergeon 1766-31 Universal Runner
For fitting to the tailstock, with:
A) 1 centring plate, with tapered holes from 0.15 - 1.40 mm and 8 points from 0.15 - 0.50 mm.
B) 1 double centring runner
C) 1 centring run. for countersinking.
D) 1 drillstock runner for 1 mm drills.
E) 1 drillstock runner for 1.5 mm drills.
F) 1 clamping key.
The universal runner is used for fitting clock and watch pivots; a skilled worker can fit pivots measuring as little as 0.15 mm. Two operations are generally used for this work: 1. Choose a drill that fits easily into the selected hole of contring plate. 2. Mark the centre with the centring runner, then drill with a bit that is smaller than the hole selected; in either case, lubricate generously. The countersinking stakes must be ground accurately on the centre with an Arkansas stone.