I have just purchased a Boxford Lathe

[Seadog]

The tang snaps off, so it's not a problem. In fact, you always snap the tang off to stop the stud or bolt jamming on it. It is 2BA I believe (may be 3/16 Whit. though)

 

[123hotchef]

The tang snaps off, so it's not a problem. In fact, you always snap the tang off to stop the stud or bolt jamming on it. It is 2BA I believe (may be 3/16 Whit. though)

If I have to drill the hole out anyway I may as well use a M6 helicoil and a nice new M6 bolt, I cant remember the last time I used a helicoil TBH

 

[Seadog]

Make sure it's a dog point screw or you'll burr tthe stud and make removal difficult.

 

[123hotchef]

Make sure it's a dog point screw or you'll burr tthe stud and make removal difficult.

just googled dog point, well the one in there was a normal bolt that explains why it was hard to remove from the stud, I cleaned the stud up with a file now it slides on and off lovely. I guess I need to turn the end of a normal screw down to make it a dog point that can be my first job on the lathe I guess!

 

[123hotchef]

woo woo the overloader came today might get the lathe running properly tomorrow

 

[123hotchef]

What was the guy thinking fitting a 2amp one

 

[123hotchef]

It runs without cutting out now.

 

[123hotchef]

Does any one know the thread sizes of these the top 2 are not 1/8bsp they are much smaller. And the scraper is a fine pitch probably imperial are they

 

[123hotchef]

 

[123hotchef]

Could the bed scraper holes be 4BA whatever that is

 

[RichardM]

for the scraper hole most probably 4BA, but try a 4mm screw in it

 

[123hotchef]

for the scraper hole most probably 4BA, but try a 4mm screw in it

Thanks I will try a 4mm tomorrow. Any idea on the grease cups

 

[RichardM]

Grease cups - no, but you could give Boxford spares a call / email if you don't have a selection of old bolts to try.

 

[123hotchef]

Grease cups - no, but you could give Boxford spares a call / email if you don't have a selection of old bolts to try.

i will try a m8 later it looks m8 size but i am sure it will be imperial. I know nothing about imperial bolt sizes.

 

[eLuSiVeMiTe]

i will try a m8 later it looks m8 size but i am sure it will be imperial. I know nothing about imperial bolt sizes.

I inherited a large cantilever tool box full of old bolts and machine screws. Been invaluable.
Even just finding on that fits o hole to put a thread gauge on is helpful.
Added to it over the years as I've stripped things down.

 

[123hotchef]

I inherited a large cantilever tool box full of old bolts and machine screws. Been invaluable.
Even just finding on that fits o hole to put a thread gauge on is helpful.
Added to it over the years as I've stripped things down.

That is another thing I need some thread gauges

 

[Seadog]

There are no metric threads on the machine. Not at home to check at present but I think the greasers may be BSF.

 

[123hotchef]

There are no metric threads on the machine. Not at home to check at present but I think the graders may be BSF.

i didnt think there would be any metric threads its too old!

 

[123hotchef]

for the scraper hole most probably 4BA, but try a 4mm screw in it

4mm will fit in But it will knacked the threads if I tighten it up

 

[RichardM]

M4 has a pitch of 0.7mm usual OD is 3.9mm 60 deg angle
4BA has a 0.66mm pitch and 3.6mm nominal OD angle 47 deg

If M4 fits and screws (finger) in easily then I wouldn't worry about it, it will only be nipped up to keep the felt holder in place.
If it gets tight it's down to your local iron mongers for some 4BA.