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6th Jul 2021, 11:43 PM #1Intermediate Member
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- Apr 2021
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- victoria
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- 28
Sheraton cross slide and compound slide spindle threads
Does anyone know the correct spec for the cross slide and compound slide spindle threads?
I need to get a dome nut for my compound slide.
I measured the thread on the spindle and it was 0.205" and 28 TPI
This seems to sit in a bit of no mans land with the thread charts I have
0.2087" - 1BA with 28.2 TPI
0.2160" - 12G UNF with 28 TPI
0.2188" - 7/32" BSF with 28 TPI
The Hercus dome nut is a different pitch - coarse thread compared to the Sheraton, I suspect 7/32 BSW
Thanks
Tony
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7th Jul 2021, 05:08 PM #2Most Valued Member
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- Jun 2007
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- sydney ( st marys )
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Do you have lock nuts on your cross slide or compound slide gib screws,if these may be the same as Hercus, which are 7/32"BSF x 28 tpi, you could then take 1 off and try it on your screw to see if it fits.
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7th Jul 2021, 07:19 PM #3Intermediate Member
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- Apr 2021
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- victoria
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- 63
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- 28
Cross slide dome nuts
Pipeclay, thanks for the reply.
I have one Sheraton dome nut on the cross slide and this also fits the compound slide.
I purchased a pair of Hercus dome nuts in the hope they would be the same but they are a much coarser thread, I am advised the Hercus is 7/32" 24TPI BSW. I havent had the opportunity to try them on anything else to confirm this as I dont have any 7/23 BSW bolts etc.
If all else fails then hopefully our local National Bolts dealer will have some bolts/screws that I can try the nuts on to confirm their size etc.
thanks again, Tony
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7th Jul 2021, 07:21 PM #4Intermediate Member
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- Apr 2021
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- victoria
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20th Jul 2021, 09:38 PM #5Diamond Member
- Join Date
- Aug 2006
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- Melbourne
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- 1,106
Is it worth fitting lock nuts on the gib screws? Do they tend to move around over time?
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20th Jul 2021, 10:43 PM #6Intermediate Member
- Join Date
- Apr 2021
- Location
- victoria
- Age
- 63
- Posts
- 28
Gib Screw lock nuts
Com-VC
thanks for the tip re the screws moving around a bit.
the gib screw heads are virtually flush with both the rests so Id have to get longer screws and lock nuts. The screws should be easy enough to get and I will then have to turn down the tips a bit to fit the gib strips.
cheers & thanks again
TonyB
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