Help With Replacement Gears

[1jeepfan]

I need to replace these gears on my dust collector. Where can I buy them? What measurements, etc do I need, so I get the right part? The manufacturer no longer makes the product nor supplies parts.

Thanks

 

[Firebrick43]

Boston Gear and Martin both have gear catologs with gear blanks. You may have to machine the inner bore to size and definitely have to machine the cross bolt or whatever that is in the side.

https://www.bostongear.com/ecatalog?page=search&cid=bevel_miter_gears_straight_spiral

https://www.martinsprocket.com/docs//catalogs/power transmission/4_gear catalog/miter-gears.pdf

Measuring with a good pair of calipers and comparing the measurements and tooth count to the charts will probably get you there. If you have troubles, take the gears off and post some pics of measurements and we can help.

 

[racecougar]

Is it a 1:1 right angle drive, or do the gears have differing tooth counts? As far as specs, the gear OD, shaft diameter (thru hole ID), overall height, and tooth count(s) are a good starting point. Are they keyed?

 

[1jeepfan]

Is it a 1:1 right angle drive, or do the gears have differing tooth counts? As far as specs, the gear OD, shaft diameter (thru hole ID), overall height, and tooth count(s) are a good starting point. Are they keyed?

I haven’t taken them off. But, it looks like there is a small bolt though them. I’m definitely not knowledgeable in this area. I would say they are 1:1. They form a right angle.

 

[racecougar]

That's a through bolt and not just a grub screw with a lock nut?

Counting the teeth or setting them side by side to verify they are the same OD will tell us whether they are 1:1 or reducing.

More detailed photos and some dimension would tell us a lot.

 

[1jeepfan]

That's a through bolt and not just a grub screw with a lock nut?

Counting the teeth or setting them side by side to verify they are the same OD will tell us whether they are 1:1 or reducing.

More detailed photos and some dimension would tell us a lot.

I will take them off today. Thank you!!

 

[Packard V8]

What is the brand? Where was it made? How many hours did the original gears last? There are some machines which are just flawed designs. Before you spend the time and money to repair it, analyze why it failed and how long the replacement is likely to last. Sometimes, (heresy to GJ!) it's just not worth fixing.

From experience, I had a Chinese-made belt/disc sander which was just such junk, I was constantly adjusting, repairing, replacing; when the motor failed, I realized I should have cut my losses way before then.

jack vines

 

[BillK]

What exactly do the gears drive ? Like the others have said take them off and get some good pictures and dimensions and I am sure something can be found.

 

[The Cobbler]

I'd also like to know what they drive, as well, looking at the picture, I'm wondering if they are meshing properly

 

[racecougar]

I'd venture a guess that the lash adjustment is done via the Nyloc in the photo.

 

[Mick56]

Is there just one broken tooth? Years ago we had an Allis Chalmers B tractor, the ring gear was bad in two spots where the engine would stop. I welded up the teeth and ground them to shape with a 4" angle grinder. Worked fine,

 

[1jeepfan]

Thanks for the help! I’ve got a cold, so not working that fast/hard. These gears are on my dust collector. They are used as part of the filter cleaning mechanism. A handle on the outside drives a horizontal bar. These gears are used to change that drive direction 90 degrees, to a vertical shaft that is attached to a set of flaps. These flaps brush against the pleats of the filter, to knock off collected dust. This is a Laguna brand collector.

I got one gear off, the one with the Nyloc on top. The gears appear to be identical. I believe Racecougar is correct, the lash adjustment seems to done by tightening the Nyloc. Looks like it was never adjusted tight enough, and allowed the gears to separate enough to slip and break.

I‘m not sure what measurements are needed, but I got a few:

1 1/6” diameter at the outside of the teeth
5/8” thick
5/16” diameter center hole
20 teeth

 

[BillK]

I found this one on McMaster Carr. It is metric which yours might very well be also. 8mm is almost identical to 5/16 It only has a small setscrew though, not a big one like yours:

McMaster-Carr

McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.

www.mcmaster.com

 

[Firebrick43]

Thanks for the help! I’ve got a cold, so not working that fast/hard. These gears are on my dust collector. They are used as part of the filter cleaning mechanism. A handle on the outside drives a horizontal bar. These gears are used to change that drive direction 90 degrees, to a vertical shaft that is attached to a set of flaps. These flaps brush against the pleats of the filter, to knock off collected dust. This is a Laguna brand collector.

I got one gear off, the one with the Nyloc on top. The gears appear to be identical. I believe Racecougar is correct, the lash adjustment seems to done by tightening the Nyloc. Looks like it was never adjusted tight enough, and allowed the gears to separate enough to slip and break.

I‘m not sure what measurements are needed, but I got a few:

1 1/6” diameter at the outside of the teeth
5/8” thick
5/16” diameter center hole
20 teeth

You need much more accurate dimensions than that. You can’t use a tape/rule. It needs to be calipers at least

Being Laguna’s it’s more than likely metric

Such as this

https://www.amazon.com/Module-Spiral-Pinion-Degrees-Meshing/dp/B0CHDVXCNN?tag=atomicindus08-20

 

[1jeepfan]

I found this one on McMaster Carr. It is metric which yours might very well be also. 8mm is almost identical to 5/16 It only has a small setscrew though, not a big one like yours:

McMaster-Carr

McMaster-Carr is the complete source for your plant with over 595,000 products. 98% of products ordered ship from stock and deliver same or next day.

www.mcmaster.com

The set screw isn’t all that big. Probably looks that way because it has a lock nut on it.

 

[1jeepfan]

I’ll look over McMasters site and see if I can find this.

 

[manwithtools]

100% going to be a metric gear being on a Laguna machine.

 

[cosmokenney]

Are you replacing them because they are worn, or just because of the one broken tooth?
If you can find the broken one, you might be able to have it brazed back on.
Take them to a machine shop. They should be able to tell you if they can braze it on. Or, worst case, they should be able to pretty easily machine a new set. It will be pricy because of the time required to cut teeth. But might be less than replacing the whole extractor.

 

[BillK]

I’ll look over McMasters site and see if I can find this.

You should be able to click on the link in my post. It takes you to the exact part.

 

[racecougar]

Are you replacing them because they are worn, or just because of the one broken tooth?
If you can find the broken one, you might be able to have it brazed back on.
Take them to a machine shop. They should be able to tell you if they can braze it on. Or, worst case, they should be able to pretty easily machine a new set. It will be pricy because of the time required to cut teeth. But might be less than replacing the whole extractor.

Pretty solid chance that the pair of gears for $18.68 on Amazon (posted by Firebrick43 above) will work; that'll be a heck of a lot cheaper and less hassle than trying to repair the broken gear.

 

[manwithtools]

Are you replacing them because they are worn, or just because of the one broken tooth?
If you can find the broken one, you might be able to have it brazed back on.
Take them to a machine shop. They should be able to tell you if they can braze it on. Or, worst case, they should be able to pretty easily machine a new set. It will be pricy because of the time required to cut teeth. But might be less than replacing the whole extractor.

Given that they are generic bevel gears, the cost for new ones (even at Laguna prices) is certain to far cheaper the repair by a machine shop. Now if OP has a welder, angle grinder and some files, he could likely repair the tooth himself pretty easily. Not a lot of precision there.

 

[pcmeiners]

Weld and grind, or have someone weld it, you do the grinding. In less than a half hour you could shape the weld into a usable tooth. The tooth does not need to approach perfect for it's function.

 

[1jeepfan]

Are you replacing them because they are worn, or just because of the one broken tooth?
If you can find the broken one, you might be able to have it brazed back on.
Take them to a machine shop. They should be able to tell you if they can braze it on. Or, worst case, they should be able to pretty easily machine a new set. It will be pricy because of the time required to cut teeth. But might be less than replacing the whole extractor.

Both gears have a few partially broken teeth.

 

[1jeepfan]

Pretty solid chance that the pair of gears for $18.68 on Amazon (posted by Firebrick43 above) will work; that'll be a heck of a lot cheaper and less hassle than trying to repair the broken gear.

I agree on the price and hassle. I’m not a welder. The set on Amazon is a little larger than these. However, there is a lot of room on the shafts for adjustment, so maybe they’d work.

 

[BurtEggley]

I need to replace these gears on my dust collector. Where can I buy them? What measurements, etc do I need, so I get the right part? The manufacturer no longer makes the product nor supplies parts.

Thanks

have you spoken with or e-mailed Laguna support to see if they have a blow up of the parts in question? They may also be able to tell you who made the device for them. Many times I've written some company or another on something way out of production, and they have a specialist who located a parts manual that led me to an alternate part that was identical. Many companies the last 20 - 25 years just used standard industry parts making their products, other than maybe some frame or stamped steel components that were special. This came up via Google "customer_service (at) lagunatools.com" . They may be short staffed due to the holidays but I would think someone would get back to you if you give them a model and serial, and ask for a parts manual for it.

 

[1jeepfan]

have you spoken with or e-mailed Laguna support to see if they have a blow up of the parts in question? They may also be able to tell you who made the device for them. Many times I've written some company or another on something way out of production, and they have a specialist who located a parts manual that led me to an alternate part that was identical. Many companies the last 20 - 25 years just used standard industry parts making their products, other than maybe some frame or stamped steel components that were special. This came up via Google "customer_service (at) lagunatools.com" . They may be short staffed due to the holidays but I would think someone would get back to you if you give them a model and serial, and ask for a parts manual for it.

Great idea! I’ll give that a try. Thanks.