This tool has been designed to enable re-privoting of arbors and the burnishing of pivots to be successfully accomplished on the model engineer's or clockmaker's lathe. Normally this work could only be carried out using a watchmaker's lathe with hollow tailstock. The design of the tool is such that it can be fitted straight into the tailstock morse taper. A number I morse taper tool is supplied as standard; other types of shank can be manufactured. The hardened drilling guide plate has 8 holes ranging from 0.6mm - 1.8mm dia. which will cover most longcase, bracket and French clock pivots. Special drills are supplied and replacements are available. An important feature is that one larger hole is provided in the plate to enable simple guide bushes to be made to suit drills for any special pivots that may be required. A special cutting lubricant is also available which greatly assists drilling.
Also provided with the tool is a Jacot drum with graded vee grooves to support pivots whilst they are being burnished.
Lever Feed Attachment
Retro Fit to Pivot & Jacot Tool JMW 1589
1. Remove the existing sleeve, by removing the four 2BA set screws.
2. Slide the new grooved sleeve onto the arbor and fit the four set screws, adjust evenly, so that the sleeve slides easily over the body and the set screw points have located in the bronze collet holder.
3. Fit and adjust the two dog pointed set screws and place a spot of grease on the point, when they engage with the groove.
4. Lock the collar on the main body of the arbor, with the allen key provided, note the main assembly can be rotated to suit drill plate or Jacot drum assembly.
5. Finally fit the lever/handle.
When longer drills are used, to clear the drill plate, the shank length may have to be shortened, or alternatively, the bronze body can be drilled deeper.
Cutting fusees for spring driven clocks can be a difficult task. With this simple tool mounted on the lathe cross slide it is relatively easy and straight-forward. A handle is provided to give precise control when cutting the groove.
The tool is designed to mount directly on to the Myford cross slide and Tee nuts and bolts are supplied. It can also be adapted to fit most 3" - 5" centre lathes. One tool is provided for wire line grooves with radius. Other tools can quite easily be ground to suit grooves for fusee chains.
This mounting kit has been made available to adapt the Myford dividing head to the rear of the lathe spindle to enable the full availability of the vast range of divisions to be used for cutting wheels on the lathe. The bracket is supplied to suit S7 ML7. It can easily be adapted to suit other models.
J.Malcolm Wild, F.B.H.I.
12 Norton Green Close
Sheffield S8 8BP
England
Telephone: (0114) 274 5693
Email: malcolm@j-m-w.co.uk
