Missing Change Gears

[crusty_rusty_]

I recently Purchased a King Canada 1440B lathe. It came with loads of tooling and machinist tools but after playing with it for a few days I discovered it is missing all the metric change Gears. I contacted the manufacturer who told me they did not stock parts for this machine any more. I also couldn't seem to find the part numbers for the change gears in the manual. I'm sure a good machinist could make these gears how ever I am an absolute beginner so making or modifying gears might be a bit advanced for my first project. I have a hunch that this lathe has been sold under many different name brands and I am wondering if anyone knows enough about this style of lathe to point me in the right direction as to where I could find a set of change gears for this machine. The manual states the metric change gears are 36t, 42t, 54t, 60t, 66t, and two sets of 40t. I will try to get some measurements of the gears today. Any help would be very appreciated

 

[DAT510]

Welcome to H-M

Is your Lathe setup with a Metric or Imperial lead screw? You are correct that design of lathe has been sold under many names. I think the most common was the Jet family of lathes.

If you have an imperial lead screw, then Grizzly Industrial sells the changes gears for metric threading for their G9249 lathe. They no longer sell the lathe, but still support owners with parts. My Jet 1024 was missing the change gears too. I took a gamble and ordered the change gears from Grizzly and they fit perfect. The change gears from Grizzly have an 18mm ID.

Parts for 12" x 37" Belt Drive Gap Bed Lathe

Grizzly Industrial, Inc. is a national retail and internet company providing a wide variety of high-quality woodworking and metalworking machinery, power tools, hand tools and accessories. By selling directly to end users we provide the best quality products at the best price to professionals...

www.grizzly.com

30T P/N 1116
32T P/N 1117
46T P/N 1118

 

[B2]

I am not familiar with this lathe, but there are lots of others that also have the 1440 in their model names. I have a PM1440GT, but there is also a PM1440. However, the 14 and the 40 commonly implies the swing diameter and the 40 the bed length. And this is what it says in your manual!

Anyway, there are folks who will make change gears for you if you know what you want. They are not complicated. Mostly the just need to know the thickness, shaft diameter and key sizes, and the number of teeth and type. I have seen one fellow that makes nice steel ones but I have lost his URL. Also you can sometimes get them 3D printed (Plastic, see ebay), but they probably hold up for quite .... depends on how often you use them.

I suggest that you use the lathe for a while and see if you really need them. Your threading gear box has 8 fundamental threads by 5 (A-E) factors of 2x. So you have quite a few available already. Very nice and easy to change threading gear box arrangement. You also already have the 120/127 and the bottom gear that is reversible. This gives you some more possible TPI gears. With only one or two other gears you can do several metric sizes, or very close approximations to them. With only one or two gears you can probably do most of what you might need. That being said you have an English unit lathe so most of the metric threads will not be exact anyway.

As a newbie it might be informative for you to see what values you can achieve with only one other gear. I once did the same for a 1970's SouthBend 10 which I got without the metric gears. I set up an excel spread sheet. Also, there are videos on how to do these calculations.

 

[B2]

Assuming you have the English version of the lathe, which the front picture indicates, then your manual's specs says you have an 8TPI lead screw (English).

 

[AGCB97]

I have a 46 tooth gear with a 5/8" bore. You could have it for the price of a flat rate box. It is .630 thick with no shoulder. Wouldn't be hard to bore to 18 mm. It's in as good or better shape than the ones you pictured. You'd have to determine the DP though.
Aaron

 

[crusty_rusty_]

Here are some measurements of the gears. The lead screw appears to be 8TPI.

 

[crusty_rusty_]

Welcome to H-M

Is your Lathe setup with a Metric or Imperial lead screw? You are correct that design of lathe has been sold under many names. I think the most common was the Jet family of lathes.

If you have an imperial lead screw, then Grizzly Industrial sells the changes gears for metric threading for their G9249 lathe. They no longer sell the lathe, but still support owners with parts. My Jet 1024 was missing the change gears too. I took a gamble and ordered the change gears from Grizzly and they fit perfect. The change gears from Grizzly have an 18mm ID.

Parts for 12" x 37" Belt Drive Gap Bed Lathe

Grizzly Industrial, Inc. is a national retail and internet company providing a wide variety of high-quality woodworking and metalworking machinery, power tools, hand tools and accessories. By selling directly to end users we provide the best quality products at the best price to professionals...

www.grizzly.com

30T P/N 1116
32T P/N 1117
46T P/N 1118

View attachment 383281

thank you for your reply. The lead screw appears to be 8TPI. That is an awesome resource you sent me I will have to dig through the web site and see if they have what I am looking for. I posted some measurements of the gears do these measurements match yours?

 

[crusty_rusty_]

I am not familiar with this lathe, but there are lots of others that also have the 1440 in their model names. I have a PM1440GT, but there is also a PM1440. However, the 14 and the 40 commonly implies the swing diameter and the 40 the bed length. And this is what it says in your manual!

Anyway, there are folks who will make change gears for you if you know what you want. They are not complicated. Mostly the just need to know the thickness, shaft diameter and key sizes, and the number of teeth and type. I have seen one fellow that makes nice steel ones but I have lost his URL. Also you can sometimes get them 3D printed (Plastic, see ebay), but they probably hold up for quite .... depends on how often you use them.

I suggest that you use the lathe for a while and see if you really need them. Your threading gear box has 8 fundamental threads by 5 (A-E) factors of 2x. So you have quite a few available already. Very nice and easy to change threading gear box arrangement. You also already have the 120/127 and the bottom gear that is reversible. This gives you some more possible TPI gears. With only one or two other gears you can do several metric sizes, or very close approximations to them. With only one or two gears you can probably do most of what you might need. That being said you have an English unit lathe so most of the metric threads will not be exact anyway.

As a newbie it might be informative for you to see what values you can achieve with only one other gear. I once did the same for a 1970's SouthBend 10 which I got without the metric gears. I set up an excel spread sheet. Also, there are videos on how to do these calculations.

Thank you for your reply. I agree with everything you are saying. It is entirely possible that I wont need the gears I have listed. I sort of just feel a compulsion to make this lathe complete if that makes sense. I will take your advise as I start using the lathe and give that youtube video a watch tonight

 

[crusty_rusty_]

Assuming you have the English version of the lathe, which the front picture indicates, then your manual's specs says you have an 8TPI lead screw (English).

I measured and it appears my lathe does in fact have an 8TPI lead screw

 

[crusty_rusty_]

I have a 46 tooth gear with a 5/8" bore. You could have it for the price of a flat rate box. It is .630 thick with no shoulder. Wouldn't be hard to bore to 18 mm. It's in as good or better shape than the ones you pictured. You'd have to determine the DP though.
Aaron

Thank you Arron that defiantly sounds like a good option and a good project for me. Ill have to figure out the DP of the gears I have.