My new Harrison lathe

[God mode restorations]

Got a few small bits done..

 

[God mode restorations]

Almost ready to make a start on the apron. But one thing is really annoying me. There are 5 bolts that hold the saddle to the apron. One of the bolt holes is missing a few threads. This is a casting defect. There is about 5 good threads at the bottom . Given the weight of the apron when it complete I am a bit concerned about only 5 threads on that bolt hole... I could drill and tap the next size up but that would mean a bigger head on the bolt that wouldn't fit the original hole. Not sure on this one.....yet.

 

[zx9]

Almost ready to make a start on the apron. But one thing is really annoying me. There are 5 bolts that hold the saddle to the apron. One of the bolt holes is missing a few threads. This is a casting defect. There is about 5 good threads at the bottom . Given the weight of the apron when it complete I am a bit concerned about only 5 threads on that bolt hole... I could drill and tap the next size up but that would mean a bigger head on the bolt that wouldn't fit the original hole. Not sure on this one.....yet.View attachment 212843 View attachment 212844

It has been like that since it was made and has survived in commercial use for donkey's years so I would not let it bother me, but I am not you.

 

[Brad93]

I wonder if you could fill the damaged section of thread with belzona, wind a tap through it from the bottom. Repaired thread in original hole.

 

[God mode restorations]

It has been like that since it was made and has survived in commercial use for donkey's years so I would not let it bother me, but I am not you.

That's a good point.

 

[WorkshopChris]

I could drill and tap the next size up but that would mean a bigger head on the bolt that wouldn't fit the original hole. Not sure on this one.....yet.

Should be fine but if you were concerned you could Helicoil it.

 

[God mode restorations]

Should be fine but if you were concerned you could Helicoil it.

Yes. I did think that to.

 

[Sam0117]

Almost ready to make a start on the apron. But one thing is really annoying me. There are 5 bolts that hold the saddle to the apron. One of the bolt holes is missing a few threads. This is a casting defect. There is about 5 good threads at the bottom . Given the weight of the apron when it complete I am a bit concerned about only 5 threads on that bolt hole... I could drill and tap the next size up but that would mean a bigger head on the bolt that wouldn't fit the original hole. Not sure on this one.....yet.

gotta admit I’m loving this rebuild I hope one day to be able to do this myself, need a bigger garage first lol just an option but not sure as unsure to where the hole is but you could drill a bigger hole and then weld in a plug and then re drill an tap the plug, helicoils are good but dunno if you need a really long helicoil, again hard to tell from the photos.

keep up with the great work can’t wait to see this finished

 

[God mode restorations]

Thanks Sam.
I will study all options and see what would be the best.

gotta admit I’m loving this rebuild I hope one day to be able to do this myself, need a bigger garage first lol just an option but not sure as unsure to where the hole is but you could drill a bigger hole and then weld in a plug and then re drill an tap the plug, helicoils are good but dunno if you need a really long helicoil, again hard to tell from the photos.

keep up with the great work can’t wait to see this finished

 

[daedalusminos]

Make up your own insert tapped to the original thread internally, externally metrics would be fine and thread lock in position

 

[Bill Edwards]

Helicoil is the obvious way to fix it.

 

[God mode restorations]

Some of the small detail works.

 

[God mode restorations]

Guys.
I need a little help hear. I am looking for a real vintage period start/stop switch gear for the Harrison. I will discreetly place it on the machine. But I cant find anything. And must be 3 phase compatible.

 

[WorkshopChris]

Guys.
I need a little help hear. I am looking for a real vintage period start/stop switch gear for the Harrison. I will discreetly place it on the machine. But I cant find anything. And must be 3 phase compatible.

I will keep my eyes open.

 

[God mode restorations]

I will keep my eyes open.

Cheers chris. Not sure what I am looking for but did a Google search for vintage switch gear .

 

[WorkshopChris]

Cheers chris. Not sure what I am looking for but did a Google search for vintage switch gear .

What size motor does it have?

 

[God mode restorations]

Have just found this allen west switch. Ex mod. 500v. Painted black would look ok...I think.

 

[God mode restorations]

What size motor does it have?

What size motor does it have?

 

[WorkshopChris]

Would you use something of the correct period so it looked right to operate a modern starter that's hidden out of the way?

 

[WorkshopChris]

Looks like a nice old 8 pole slow speed, I have a much smaller old 6 or 8 I cant remember in the awaiting projects pile for some attention as the internal rubber insulated wire has turned into liquid rubber in places.