How to run bearings in this set up?

[5-7HEAVEN]

A 5/8" ID/1 3/8" sealed bearing should be very easy to find.

I thought about that. The bearing pillows I have mount pretty well to the engine mount, but I don't feel too comfortable with messing with that piece.

Your motor mount plate should be ok, especially if it's welded to the frame.

If uncomfortable, increase the plate size, say, from 1/8" to 3/16"/1/4".

This might be part of what you're looking for:

Pardon Our Interruption...

and this:

FICTION SAVAGE SEALED MID BOTTOM BRACKET 19MM BMX BIKE BB KIT FIT CULT PRIMO | eBay

New Fiction Savage MID Sealed Bottom Bracket Kit 19MM IN BLACK, SILVER, RED OR BLUE. LISTED PRICE IS FOR ONE BOTTOM BRACKET KIT. To many issues sorry.

www.ebay.com

If you can't find the correct size bearing, use this:

5/8" x 3/4" x 3" Shaft Adapter Pulley Bore Reducer Sleeve Bushing Sheave Key | eBay

Find many great new & used options and get the best deals for 5/8" x 3/4" x 3" Shaft Adapter Pulley Bore Reducer Sleeve Bushing Sheave Key at the best online prices at eBay! Free shipping for many products!

www.ebay.com

or this:

Pardon Our Interruption...

 

[MEASURE TWICE]

The stresses there and what to weld to must be considered. I added gussets as well as connecting top to bottom tube with a couple of plates welded on where I mounted engine platform.

 

[RocketJ]

A 5/8" ID/1 3/8" sealed bearing should be very easy to find.

Your motor mount plate should be ok, especially if it's welded to the frame.

If uncomfortable, increase the plate size, say, from 1/8" to 3/16"/1/4".

This might be part of what you're looking for:

Pardon Our Interruption...

and this:

FICTION SAVAGE SEALED MID BOTTOM BRACKET 19MM BMX BIKE BB KIT FIT CULT PRIMO | eBay

New Fiction Savage MID Sealed Bottom Bracket Kit 19MM IN BLACK, SILVER, RED OR BLUE. LISTED PRICE IS FOR ONE BOTTOM BRACKET KIT. To many issues sorry.

www.ebay.com

If you can't find the correct size bearing, use this:

5/8" x 3/4" x 3" Shaft Adapter Pulley Bore Reducer Sleeve Bushing Sheave Key | eBay

Find many great new & used options and get the best deals for 5/8" x 3/4" x 3" Shaft Adapter Pulley Bore Reducer Sleeve Bushing Sheave Key at the best online prices at eBay! Free shipping for many products!

www.ebay.com

or this:

Pardon Our Interruption...

I like that conversion piece. The pedal shaft is 2 1/8" and no one seems to have that bearing, but that conversion piece looks like it would work. I'll take a look at it.

 

[curtisfox]

Conversion piece is meant for three piece and the shaft is hard for bearings to rid on, so may not work for the trans shaft.......Curt

 

[RocketJ]

Conversion piece is meant for three piece and the shaft is hard for bearings to rid on, so may not work for the trans shaft.......Curt

What would you suggest, curt? Just looking for the proper sized bearings?

 

[curtisfox]

Maybe you can fit them inside the old bearing cups? I would have to check, but think it would bring it down to 2"........Curt

 

[RocketJ]

okay I have one last obstacle to get by. I found flanged bearings that fit the pedal shaft finally, but they're 2" outside diameter, 1" inside diameter. This leaves me with a 3/8 gap between the bearing and the gearbox shaft. What should I do? If anyone can find a 3/8 sleeve that would be great. I've been unable to find such a thing.

I'm considering something. What if I buy a 5/8 to 3/4 sleeve and then place a 3/4 to 1" sleeve over that?

 

[5-7HEAVEN]

okay I have one last obstacle to get by. I found flanged bearings that fit the pedal shaft finally, but they're 2" outside diameter, 1" inside diameter. This leaves me with a 3/8 gap between the bearing and the gearbox shaft. What should I do? If anyone can find a 3/8 sleeve that would be great. I've been unable to find such a thing.

I'm considering something. What if I buy a 5/8 to 3/4 sleeve and then place a 3/4 to 1" sleeve over that?

This MIGHT work:

2 Steel 5/8 Idx1 Od X 3/4L Wheel Axle Bushing Bearing Machinist Mower 46% Off for sale | eBay

Get the best deals for 2 Steel 5/8 Idx1 Od X 3/4L Wheel Axle Bushing Bearing Machinist Mower 46% Off at eBay.com. We have a great online selection at the lowest prices with Fast & Free shipping on many items!

www.ebay.com

 

[RocketJ]

This MIGHT work:

2 Steel 5/8 Idx1 Od X 3/4L Wheel Axle Bushing Bearing Machinist Mower 46% Off for sale | eBay

Get the best deals for 2 Steel 5/8 Idx1 Od X 3/4L Wheel Axle Bushing Bearing Machinist Mower 46% Off at eBay.com. We have a great online selection at the lowest prices with Fast & Free shipping on many items!

www.ebay.com

That looks promising. My only concern with those is the lack of thickness on then. If it was a perfect cylinder it would work best. I'll do some thinking though.

 

[5-7HEAVEN]

I think you should be fine.

3/16" is very thick, and you'll have two bearings/bushings supporting the relatively short shaft.

Normal crank reducers for 6.5hp engines are 1/16"-1/8" thick.

 

[Sidewinder Jerry]

You could always contact David Staton of Staton Inc. If he doesn't have what you need; he can make what you need.

 

[5-7HEAVEN]

You could always contact David Staton of Staton Inc. If he doesn't have what you need; he can make what you need.

I don't think Staton can beat this price @ $4

okay I have one last obstacle to get by. I found flanged bearings that fit the pedal shaft finally, but they're 2" outside diameter, 1" inside diameter. This leaves me with a 3/8 gap between the bearing and the gearbox shaft. What should I do? If anyone can find a 3/8 sleeve that would be great. I've been unable to find such a thing.

I'm considering something. What if I buy a 5/8 to 3/4 sleeve and then place a 3/4 to 1" sleeve over that?

You don't want to run a bearing, then a sleeve within that bearing, then a sleeve within that sleeve, then a shaft.

How about this? A 2" OD bearing with a 5/8" ID:

Kobe #CCYR-2-S/IS Cam Follower Bearings. 2" od x 5/8" id x 1-1/4" wide. | eBay

Find many great new & used options and get the best deals for Kobe #CCYR-2-S/IS Cam Follower Bearings. 2" od x 5/8" id x 1-1/4" wide. at the best online prices at eBay! Free shipping for many products!

www.ebay.com

Be very careful, though.

You need .001" or more interference fit.

You can't fit a 5/8" shaft in an ID sleeve/bearing hole that's exactly 5/8".

 

[Sidewinder Jerry]

I don't think Staton can beat this price @ $4


You don't want to run a bearing, then a sleeve within that bearing, then a sleeve within that sleeve, then a shaft.

How about this? A 2" OD bearing with a 5/8" ID:

Kobe #CCYR-2-S/IS Cam Follower Bearings. 2" od x 5/8" id x 1-1/4" wide. | eBay

Find many great new & used options and get the best deals for Kobe #CCYR-2-S/IS Cam Follower Bearings. 2" od x 5/8" id x 1-1/4" wide. at the best online prices at eBay! Free shipping for many products!

www.ebay.com

Be very careful, though.

You need .001" or more interference fit.

You can't fit a 5/8" shaft in an ID sleeve/bearing hole that's exactly 5/8".

Just letting him know if he can't find what he's looking for David does do really good custom machining work.

 

[RocketJ]

I don't think Staton can beat this price @ $4


You don't want to run a bearing, then a sleeve within that bearing, then a sleeve within that sleeve, then a shaft.

How about this? A 2" OD bearing with a 5/8" ID:

Kobe #CCYR-2-S/IS Cam Follower Bearings. 2" od x 5/8" id x 1-1/4" wide. | eBay

Find many great new & used options and get the best deals for Kobe #CCYR-2-S/IS Cam Follower Bearings. 2" od x 5/8" id x 1-1/4" wide. at the best online prices at eBay! Free shipping for many products!

www.ebay.com

Be very careful, though.

You need .001" or more interference fit.

You can't fit a 5/8" shaft in an ID sleeve/bearing hole that's exactly 5/8".

I went with the brushings. I'll see how it turns out

 

[5-7HEAVEN]

I have a 5/8" OD jack shaft that's 11" long.

It runs thru a 3/4" ID hollow shaft with two flanged bushing.

 

[RocketJ]

I have a 5/8" OD jack shaft that's 11" long.

It runs thru a 3/4" ID hollow shaft with two flanged bushing.

do you have a picture of the shaft? I'm just trying to thnik of how to keep the bushings in place without them falling deeper down the shaft.

 

[5-7HEAVEN]

I don't have pics right now.

If using flanged bushings, the flange keeps them from sliding inward.

When possible, have the bushings pressed into place. Then their ID is reamed to allow the shaft to revolve effortlessly inside the bushings.

If the bushings' OD is loose, you can always shim them or install lock collars to prevent them from falling out.

 

[curtisfox]

One other trick is to center punch were the bearings go it will swell it up, providing they are not to loose..........Curt

 

[RocketJ]

I have 3 major obstacles left in this build. Any advice would be greatly appreciated.

1) How to attach foot boards to the frame without permanent modification

2) how to attach the gearbox support to the frame

3) (optional) How to turn the fork into a leaf spring fork.

I know Howard B turned his fork into a leaf spring, but I can't find any good pictures of it and he's not on anymore.

 

[MotoMagz]

P clamps and 3 piece clamps https://www.amazon.com/Bikers-Choice-Piece-Clamps-161140/dp/B0068G08OS for mounting. Of course to your frame size. On the fork..mine was done by installing a shaft with a threaded bottom into the bottom of the fork. Then a pin through both and welded. Then drill a hole size of the shaft in leaf spring. Now it can be bolted to fork. Also a piece was welded to keep leaf from moving side to side. Rods are go cart axles and Heim joints.