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Pacemaker relieving attachment

Andy FitzGibbon

Diamond
Joined
Sep 5, 2005
Location
Elkins WV
My 1946 Pacemaker is equipped for a relieving attachment, thought unfortunately I don't have the driveshaft or the special compound slide. I thought other owners might be interested in seeing the change gear chart for the attachment.

Andy

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Not a great photo, but it's what I have at the moment. 1946, 14x54, 18 speed head, L1 spindle. Appears to have been the "tool room" model, as it was optioned with leadscrew reverse, ball bearing TA, Sjogren collet chuck, rapid carriage traverse, and relieving attachment. It also has a two speed motor, which provides the slow speeds necessary for the relieving attachment without using a sub-headstock.

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This is a circa 1946 Pacemaker set up with relieving using a sub-headstock, its a pity they don't show a pic of the back side of the machine;

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That's a different setup than the "Universal Relieving Attachment" that my lathe was fitted with, which is shown in Pacemaker Bulletin No. 10. I wonder if the one in the photo was a custom job for dedicated cam turning, as it appears to oscillate the whole cross slide from the rear of the carriage, instead of oscillating the compound rest from the front.
 
Relevant pages from Bulletin 10. The extra "hump" in headstock and swinging cover castings are more visible here than in my photo... why the factory stated that this attachment "cannot be applied after the lathe has shipped".
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Sent from my SM-G950U using Tapatalk
 
Hey Andy,
Any chance you can snap a picture of the relieving attachment quadrant bolt on your machine?

It looks like it’s just a bolt and a washer that holds it on but it’s hard to tell from the scans. Mine is missing and I’d like to make a new one.

Thanks,
Andy
 

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