Member postings for Bob Astill

Did you give the ticket away we are going tomorrow

Hi thanks for all the replys I got a holder with 2 grub screws that clamp the side of the cutter its not ideal but it does the job i just ground 2 flats on the cutters when needed.

Bob

I am almost sure It says 32mm on the side i will check tomorrow the hole in the end of my large Clarkson chuck is 1" so it would need a bigger collet holder if i can find one.

Hi all i have a Bridgeport miller with R8 fitting i have been given a lot of brand new cutters they all have a 32mm shank with a thread on my large Clarkson chuck only goes to 25mm. i have searched the net for an adapter but i am not sure i am looking with the correct phrasing keeps coming up ER32 but this only goes to 25mm i did find something similar but it was for tools with a flat on the side of them. Can someone please tell me what i need to get and from where or what to search for? Many thanks.

i will have a look thank you

right the gears are 20 degree pressure angle and 1.5 module (pitch) 5/8 thick and 3/4 hole with a key slot does anyone know the best place to start looking for the ones that are missing out my set

regards Bob

Thank you Brian i am unsure now after speaking to a friend who is a gear cutter and might be making me my missing gears has said it can be 14.5 i am taking a gear to him later this week for him to measure up as i am having no luck finding any i will keep you posted.

Thank you Michael the animation explains it easier than trying to read how the differences work.

I now know my lathe is missing several change gears for screw cutting for standard and metric threads it comes with 30, 45, 55, 60, 65, 70,75,120 and 127 I only have 30.60,65 and 120 the 60 has one tooth missing so I need to replace that one as well they are 20° pressure angle gear.

The 6 gears I need are 45,55,60, 70,75, 127

The gear measures the best i can with a vernier 16mm (0.63) thick the hole is 19.04mm (0.7500) and the keyway is 6.3mm(0.2490) widw and 2.82mm (0.1110).

Thanks for the reply Dave if i can help let me know.

thank you for the reply i will take a gear off and have a good measure and come back to you a friend who is a turner is also coming to look for me

ohh ark at err

on lathes.co.uk it says

with a conventional "Norton" pattern quick-change gearbox, the lathe could generate 27 pitches and feeds with a further 27 available by the simple expedient of swapping over two gears on the drive arm. A range of other changewheels (with a 20-degree pressure angle) was supplied to allow a wide range of metric pitches to be generated, these included: 30t, 45t, 55t, 60t, 65t, 70t, 75t, 120t and 127t. The 11/8-inch diameter 4 t.p.i Acme-thread leadscrew was fitted with a dog-clutch at its headstock end and was normally left disengaged.

Hi all i want to do metric threads and am trying to learn screw cutting on my Henry Milnes lathe according to lathes.co.uk they did several change gears for my lathe but i can not find any i have emailed loads of companies who do used machinery to no avail can anyone point me in the right direction to find some do they do machine breakers like scrap yards for cars? or will i have to have some made?

Many thanks Bob

Hi all Bob from Caythorpe Lincolnshire work on two stroke Kart engines by day Have a small milling machine (on look out for a better one) a large Henry Milnes Lathe Mig and Tig welders love making tools etc.

Hi Dave i am also in Lincolnshire and have a large Milnes screw cutter i have fitted a DRO and love it but i have bad play in the cross slide the brass nut is badly worn do you know if it is possible to cut the thread on the Milnes i have always wanted to learn screw cutting but not got there yet this could be the time lol