Dividing head.

[piman]

Hello all,

I recently bought this dividing head and am a little puzzled by the function of the shaft coming out of the rear. It is keyed and obviously should have a handle, there is a spring loaded plunger to the rear of the dividing plate which locks that in position. If I disengage that plunger, the shaft will rotate and turns the dividing plate, otherwise it won't turn.

Is anyone familiar with this type of dividing head.

Alec.

 

[MattF]

Is there a worm gear on the end of the shaft? A photo of the rear of the unit and the assembly in question would be handy.

 

[CRB]

I cannot really help since I am going to learn by making one over the holidays, I hope< but this will give you an idea of what you may be able to do with it.
http://www.homews.co.uk/page428.html

 

[Phil@mpliron]

Hi Alec
When i was at college many years ago we had to make a slab mill cutter using helical milling on the horizontal miller the keyed shaft on the dividing head was coupled to the table lead screw on the miller so when the table moved the dividing head rotated.
The coupling was done using 2 gears so you could workout the ratio of rotation to table travel.
Hope this makes sense

Phil

 

[piman]

Hello Matt,

the shaft has a small crown wheel and pinion at the non drive end, the pinion is attached to a spur gear which is the first of three spur gears, the last driving the outer sleeve to which the dividing plate is attached.

Phil,

I think you are on the right track. Perhaps I didn't try hard enough to turn the shaft when it was attached to the dividing plate, I see what you are getting at. Your illustration is identical to mine except for some minor details.

Alec