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Thread: Spring type parting toolholder.
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23rd Nov 2020, 08:43 AM #1Mechanical Butcher
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Spring type parting toolholder.
Anyone tried a spring toolholder for parting?
Hercus training lathes for schools were equipped with them.
They don't feature anywhere much nowadays, maybe because they don't fit popular QCTPs easily.
They offer a simple solution to parting problems, and other machining jobs.
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23rd Nov 2020, 11:15 AM #2Golden Member
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Yes. I used to have problems parting on my old 9x18 Brackenbury and Austin lathe, a fairly lightly built machine, using a 1/8 HSS parting blade in a conventional holder. The problems were usually digging in unexpectedly due to flexing of the top slide and snapping the blade. When I changed to a 3/32 parting blade in a spring holder all the problems miraculously disappeared. Parting on the B & A is now no longer an adventure, but a predictable operation just like any other.
The tool's box is branded Rimet. Some other Rimet tools I have were made in India and are of variable quality. No idea where this tool holder was made, but it seems OK. I bought it about 25 years ago, and the vendor is long gone, so I can't suggest where to look for these now.
It really did make an enormous difference to parting off on the B & A lathe, and is usually first choice for parting on the Chinese 13x40 too.
Frank
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23rd Nov 2020, 03:54 PM #3Most Valued Member
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Back in the era when metal shapers were common, a variation of that spring holder was often used in them with good results from what I've read.
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23rd Nov 2020, 08:24 PM #4Mechanical Butcher
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I can vouch that spring toolholders in shapers are useful, especially cutting narrow slots like keyways.
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23rd Nov 2020, 08:30 PM #5Most Valued Member
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I've got one that I welded a block of steel to the side of the main body to lower the height. Works fine.
part 001.jpgpart 002.jpg
part 003.jpg
peterLast edited by bollie7; 24th Nov 2020 at 03:07 PM. Reason: pics added
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24th Nov 2020, 01:56 PM #6Most Valued Member
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I seen the name LOCK on your toolholders and it spurred a memory from the dim dark past so i pulled open a draw and dug these little chaps out.
Thanks for reminder, these were used on my macson some years ago.
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24th Nov 2020, 09:14 PM #7Mechanical Butcher
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24th Nov 2020, 09:16 PM #8Mechanical Butcher
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25th Nov 2020, 08:53 AM #9Most Valued Member
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