Harrison Mill missing parts

When i got my Harrison Milling Machine it was in pieces. Now its almost back in one piece i am noticing some parts are missing. The parts are [ Part number MH1 1 12 Locknut and SG 253 Compression Spring. I know the lock nut has a 1/2 UNC thread. Could someone measure these parts for me?. Many Thanks John

I can't find a reference to the nut in my manual, but I may just being blind! There are no odd nuts on my machine so would just assume that it's a standard nylock. The spring is located in the table feed handle and is 1" in outside diameter, 1/8" diameter wire, 7/8" in height with 5 coils. I attached a picture of it.

Hope that helps,

All the best

Graham

Correction, I read the calipers wrong, it's 1/16" wire diameter!

Sorry.

Graham

Thanks very much Graham. I will look through my box of old valve springs. The Lock nut is the part you unscrew to disengage the power feed. Just where the spring fits.

Ah, I've been looking at my manual in closer detail and I assume there are actually different versions / revisions of this mill and not just the "normal" vs "universal" types. Mine is a late model universal and according to the manual I have the hand wheel is permanently engaged and secured by 2 knurled lock nuts. However it isn't, and has a knurled nut that can be unscrewed to disengage the hand wheel, much similar in construction to the normal version. I also assume this why the part numbers don't match. The nut I think your after is listed as MH1-4-42 in my manual (83 on diagram). I shall measure it tomorrow and report back. But just in case please don't assume that these parts will fit yours.

All the best

Graham.

Hi Graham, Sorry but i don't know where that part number that i first posted came from MH1-4-42 is the one. I think that spring presses on the Knurled lock nut that i need to make. I think mine is a late one. I will just brave the cold and go look at the Serial number. 142220. Thanks John

Hi John,The nut on my machine is 1 1/2" outside diameter and 1/2" thick, with the outside knurled. There is also a 1/4" set screw with a brass pad on one side. It's threaded 3/4" UNC, so looks to be slightly different to yours. The spring is on the left inside the dog clutch on mine with the nut bearing up against the right hand side of the handle. I've included a photo.

That serial puts yours as mid 1973. mines a late 77.

All the best

Graham

Thanks for going to the trouble to take the pictures Graham. You would have thought that a part with a part number would be the same? I don't understand what the grub screw and the brass pad are for? Many thanks John

I'm currently restoring one of these machines. Mine is a 1969 version. I normally post on the mig welding forum. You can see what I'm doing there under Harrison Horizontal/Vertical Mill Restoration. It's always good to find someone else who has one of these.

Hi This is my Handwheel, it has the Vernier scale,an earlier design?

Mine has a graduated wheel, but it's left of the photo, you can just see the knurling. I guess you have the normal version with the power drive on the right hand side? which I'm guessing is what that dog gear engages. On mine the power drive is attached to the left of the table with a lever on the front that engages the power feed. Hence the difference in design. The spring and nut are not critical and anything that fits should work. The 1/4 set screw and pad is to just lock the nut on the threads, you can see it in my photo.

All the best

Graham

Hi Is there anyone with the same type as mine that they could photograph for me? Thanks John

Hi it is part A in this photo i need the dimensions for. thanks any Harrison Mill owners. John

Hello Could anyone tell me where the oil drain plug for the main gearbox is located on the Harrison Mill