Odd Threads on Milling Machine

PostHarvest

Member
Location
Warwick
Going to go back to the ag dealer and ask him if he's absolutely certain those bolts he gave me were BSW.
I'm surprised if an ag dealer carries BSW bolts in stock, they won't be used on any modern kit. In the 1970's I bought a set of whitworth spanners that were being sold off as obsolete sizes. I used one of them yesterday of course.
 

HolzKopf

Member
Location
Kent&Snuffit
I like others would think that British made machines of that era particularly with tapped threads in cast iron would be BSW or UNC
Definitely not metric and unlikely to be UNF unless the threads are smaller in diameter say below 1/4 and then they could be UNF, BSF or BA
I can't see why they would be BSP unless for a pipe fitting

HK
 
I'm surprised if an ag dealer carries BSW bolts in stock, they won't be used on any modern kit. In the 1970's I bought a set of whitworth spanners that were being sold off as obsolete sizes. I used one of them yesterday of course.
I'm not sure said dealer has cleared out his bolt cupboard since Archimedes invented the screw :ROFLMAO: If anyone will have them in stock I'd put my money on this guy.
 

pycoed

Member
Measuring the thread pitch on smaller holes is a bit of a bind - I believe gunsmiths use Woods metal (which melts below water boiling point - much loved to make spoons for apprentices to stir tea with apparently:D) to pour into a hole then unscrew & measure the Woods metal male thread, which is a lot easier.
You could try by lightly oiling the hole threads & pressing a lump of Blutak or similar into the hole to fill the threads, then carefully unscrewing the plug. I've had varied success with this, it must be said, though it should work if you are careful. 3/8 & 1/2 holes should be achievable.
Thinking it over perhaps pouring paraffin wax may be a better bet?
 

BredRedHfd

Member
BASIS
Location
NE Derbyshire
Measuring the thread pitch on smaller holes is a bit of a bind - I believe gunsmiths use Woods metal (which melts below water boiling point - much loved to make spoons for apprentices to stir tea with apparently:D) to pour into a hole then unscrew & measure the Woods metal male thread, which is a lot easier.
You could try by lightly oiling the hole threads & pressing a lump of Blutak or similar into the hole to fill the threads, then carefully unscrewing the plug. I've had varied success with this, it must be said, though it should work if you are careful. 3/8 & 1/2 holes should be achievable.
Thinking it over perhaps pouring paraffin wax may be a better bet?
Shave a small softwood stick down or find a piece of dowel. Screw in, then out, and measure the pitch off that.
There's also American pipe thread too, very similar to bsp, but not identical..
 

Wood field

Member
Livestock Farmer
Location
South Pennines
Not had Tom senior, but older machines we had such as centec would be whitworth and fine threads bsf
And very small BA
Worth getting hold of the old Zeus books , full of drill and thread size info
 

milkloss

Member
Livestock Farmer
Location
East Sussex
A152DBDF-E15C-485F-9E89-68B4BE62287E.jpeg
 

milkloss

Member
Livestock Farmer
Location
East Sussex
From memory unf/unc have a different thread profile to a bsf/W. To confuse things certain sizes will have the same tpi, one will even screw into the other yet not the other way round because of the thread profile.
 

Swarfmonkey

Member
Location
Hampshire
Helped a mate sort out an old M1 with an S type vertical head a few years ago. Fixings for the motor mount plate on top of the M1 were Whitworth, as were the ones that clamped the S type head in place.
 

Netherfield

Member
Location
West Yorkshire
Times fly by unfortunately.

There was a chap rented a unit in the old David Brown setup, he had rack after rack of fasteners, he specalised in making up kits of bolts for old cars, if you needed cylinder head bolts for a 1950 Jaguar or a Triumph Herald gearbox bolts he had them and posted them all over the world, he could recognise all threads by sight.

Also sold all the regular modern stuff as well, then one day, 20 years ago, he had a heart attack, only around 50 years old, great loss.
 
Have you found out what thread it is yet @TechWise ?
Yes and apologies for not updating.
Confirmed as Whitworth. It seems that Whitworth is almost interchangeable with UNC apart from the 1/2" one which is what was causing the confusion. The guy who gave me the UNC bolts thought that they would at least screw in and give us a starting point, so he learned something new too!
 

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Man fined £300 for bonfire-related waste offences

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Written by William Kellett from Agriland

court-640x360.jpg
A man has pleaded guilty at Newtownards Magistrates’ Court to waste offences relating to a bonfire next to the electrical sub-station on the Circular Road in Newtownards, Co. Down.

Gareth Gill (51) of Abbot’s Walk, Newtownards pleaded guilty to two charges under the Waste and Contaminated Land (Northern Ireland) Order 1997, for which he was fined £150 each and ordered to pay a £15 offender’s levy

On June 25, 2018, PSNI officers went to Gill’s yard, where they found a large amount of waste consisting of scrap wood, pallets, carpet and underlay.

Discussion with Northern Ireland Environment Agency (NIEA) officers confirmed the site...
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