Topcraft's New 10d

That is a nice looking machine.

We can see that the spindle belt for a vertical countershaft 10" is 4L310. Is there a similar number on the motor belt? Someone asked these very questions late last month I think on Yahoo.
 
I will check the belt size next time I'm in the shop. Just thinking about the indexing holes on the bull gear. I know it must be used as a divider, if that's so, how many holes? I suspect that their could be some heavy math in my future if I ever decided to use it. I will have to clean it up a bit, and see what if any marks it may have. Seems there would be some kind of chart to make it easier to use. Anyone ever used it in making dials?
 
OK. Thanks.

There are 60 indexing holes in the bull gear. But there are no markings on the gear. The Molo recommends marking the holes that are to be used with a pencil before commencing. I'm not sure whether or not I ever heard anyone report using the indexing holes. The holes would not be useful for indexing a new cross-feed dial. Someone somewhere (but I don't recall which forum) reported using a 100 tooth saw blade for doing that. There is a chart for using the indexing holesin the MOLO.
 
Robert. Just got the collets, now I have a basic set, and can start looking for other things I need. Thanks, very satisfactory buying experience.
 
Sounds good. I received the three hex collets from Vince yesterday.
 
The belt on the motor pulley is - Dayco 5440 - also got some of the casting numbers. bull gear guard is 10D-246, the one on the left side is 10D-247, change gear cover is 10D-28, upper spindle bracket is D-21, tailstock is 10-6. there are more, but in awkward spots, next time i will see if a mirror helps.
 
Chuck,

Unless you happen to have a Dayco to industry standard cross reference chart, for the Dayco number to be useful, you have to find someone who sells Dayco and advertises them as Dayco. Which eliminates most of the on-line sources. Most do not reveal who made their belts, and most use their own part numbers. Most V-belts actually carry both the manufacturer's in-house number and the industry number. The spindle belt happened to get photographed with the industry number visible. See whether or not the motor belt carries a similar format number. The Atlas motor pulleys for the 9", 10" and 12" are all for 1/2" FHP belts so we know that it will start with "4L".

The casting part numbers are interesting. But are you sure that the spindle hanger (upper spindle bracket in your post) is D-21 instead of 9-21? All the way up through 1966, it is shown as 9-21 in the parts manuals for 10". 10-6 is the tailstock base, not the tailstock. However, I would have expected 10D-6. The tailstock itself will be either 10-5 or 10D-5. You'll find the number in the recessed front of the main casting. If you should happen to pull the compound slide off of the compound swivel, let us have that number, too. Should be 9-303 I think.
 
It was 9-21 will check the rest out tomorrow .


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OK. That's a relief. Editing PDF's to correct errors is a real PITA. Usually easy, but very time consuming.

One thing that's puzzling me tonight about parts and part numbers is the compound slide, upper compound swivel and lower compound swivel/cross slide. We have parts lists of one sort or another dating from 1933 +/- 1 all the way up to 1966. In all of these, the compound slide has part number 9-303. Yet we know that there were at least two different versions, one Zamak and one cast iron. And from photographs of each, including in catalogs or parts manuals, the top of the slide doesn't look the same.

more later.
 
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