Pig and Sheep Probang Head #surgivet

Pig and Sheep Probang


The head is turned from free cutting brass, stock diameter 3/4 inch (19 mm). Machining sequence as follows:

  1. Mount bar in chuck, face and centre drill.
  2. Drill No 30 diameter to 1 1/4 inch (32 mm) deep, countersink to 1/4 inch ( 6 .4 mm) diameter.
  3. Turn profile with form tool and blend by hand with fine emery cloth.
  4. Plunge centre groove 1/4 inch (6.4 mm) wide x 1/4 inch (6.4 mm) deep.
  5. Bore recesses with form tools as per drawing.
  6. Part off to 1 inch (25.4 mm) long.
  7. Reverse in chuck, mount in chuck fixture and turn other profile, see fixture sketch.

Wire Handle

The handle material for all probangs is 10 S.W.G. stainless steel wire in a hard drawn state to provide ‘spring’. It is an advantage to have this supplied in coil form so that the handle follows the natural curve of the wire coil. 
The first operation, at this stage of manufacture, is to cut to length and form an eye at one end as per drawing. The rivet head will be formed later during assembly. 


Proceed as follows:

  1. Slide brass cup, cattle or calf size down the wire.
  2. Mount wire in head forming fixture and form head. This operation is simplified if the wire is locally heated to red before hammering into shape.
  3. Clean off heating discolouration from around rivet head, flux area with ‘Easy flo’ silver solder flux and slide cup into position.
  4. Silver solder in position, quench and allow to soak to remove flux residue.

Finishing and Final Assembly

Excess solder and any wire that protrudes from the end of the cup is filled and hand polished to blend with the cup profile. The final finish to the whole outside of the cup is achieved with a cloth buffing wheel. 
To complete the assembly, a loop of brass safety chain is passed through the eye in the wire handle, as per sketch. surgivet

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CTI-SURGIVET (Chun Tara Industries)


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