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Need Myford change gear

I need a 40 tooth Myford change gear.

I bought a Myford Metric attachement for my Super 7, but it is missing the 40 tooth gear which is needed for numerous metric threads. Anyone got one setting around?? (I didn't see one on ebay)

I got a few oddball Myford gears laying around I could trade if that is an incentive.

BTW, this attachment comes with 12 gears, but I don't understand why. For example it comes with two 60s and two 55s but I don't see any setups where you ever use more than one of each to cut a metric thread.

chuck

Reply to
Chuck Sherwood
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Hmm, sounds like an excuse to learn how to make your own gears. I wish I could make an excuse like that, but my lathe has a quick-change gearbox.

Reply to
woodworker88

About the multiple gears, do many setups use the 60's and the 55's? If they were used in almost every common setup, it would make sense that Myford might anticipate unusual wear and include a spare of those gears likely to wear down fastest. Besides, those gears sound like some of the largest in the set. Large gears have more teeth, so the probability that a tooth will become broken or damaged is higher than on a small gear.

Reply to
woodworker88

That's an interesting theory. Can't think of a reason why it would be true, though. Actually I'd think the smaller gears would be more likely to fail sooner.

Reply to
xray

My lathe has a QC gearbox too. But I cannot cut metric threads without using some change gears ahead of the QC gearbox.

chuck

Reply to
Chuck Sherwood

I have owned three myford lathes. The first 2 were both change gear machines and were 50 years old. The myford gears are nice steel gears and the only gears that showed any wear at all were the small gears on the reversing lever.

Apparently this metric conversion can also be used to cut threads other than metric (BA) so there must be a setup that requires 2 of the same gears. I will cross that road when I get to it.

Right now I need to find a 40 to complete the set. The ebay seller was clever on this auction. He stated what it was and listed the gears that were included. I just didn't realize that one gear was missing. I'm sure I can buy it from myford.

chuck

Reply to
Chuck Sherwood

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