Woodruff Key Size Chart

[JimD 3,345]

I was doing some random Google searches this evening and found this nice woodruff key size chart and a pdf link to another one. I thought it might be of interest to all you members who are delving into these transmissions to repair them. It could help you identify what size new keys you need to replace. It's even Stevasaurus Approved!

 

 

 

 

 

And the pdf link.. http://www.stdsteel.com/wk.pdf

You can print this out to have on hand if you want also.

I hope this will be of some help to you all.

 

Jim

[stevasaurus 22,677]

This is excellent and about time...this needs to be pinned..

[squonk 40,966]

I found a chart somewhwere and printed it out a couple of years ago. Hung it in my shop. Came in real handy on My 73 with 2 different size keys on the rear axles!

[stevasaurus 22,677]

Thanks Jason, can't tell you how many times I have tried to figure out what is going on in this chart..  this will save us a lot of time. 

Edited September 3, 2014 by stevasaurus

[Tankman 3,518]

Nice chart, I'm savin' a copy.

 

What size are the keys on a 1-1/8" axle? I can find the T part number but, no size listing.

 

I hate the big T for listing only part numbers, would be nice if sizes were listed; i.e.: bolt, nut, etc. Ugh! 

[ranger 1,741]

Mine are 1-3/8" x 1/4" : # 22 I think ,can't seem to be able to find them over here though,will have to make some.

[Tankman 3,518]

Thanks Ranger!

 

Such a cute doggie! Is he available?  

[ranger 1,741]

Thanks Ranger!

 

Such a cute doggie! Is he available?  

He's a she

[gwest_ca-(File Mod) 11,019]

On 1/2/2015 at 5:04 PM, Tankman said:

Nice chart, I'm savin' a copy.

 

What size are the keys on a 1-1/8" axle? I can find the T part number but, no size listing.

 

I hate the big T for listing only part numbers, would be nice if sizes were listed; i.e.: bolt, nut, etc. Ugh! 

Not real pretty but is a start - Wheel Horse part number to Woodruff key

Garry

[bamaboyz71 3]

I lost mine so I went to TSP and got some but had to grind 'em down....I would like to know what size goes in the pully shaft that comes out of the trans? 1960 suburban.

[gwest_ca-(File Mod) 11,019]

Wheel Horse key # 1122 is a No. 9 Woodruff key - 3/16" x 3/4"

 

Garry

[Wheelhorse#1 1,642]

Thanks for the timely info !

I have a worn rear hub keyway on my ole 71 800.

Have to get another one,as o see no way to fix it .Wile I’m at it I’ll add another set screw to the other  side.

 

Edited May 29, 2021 by Wheelhorse#1

[gwest_ca-(File Mod) 11,019]

937022 Woodruff #15 keys - 1/4" x 1"

[ranger 1,741]

Whatever you do, don’t add another set screw 180 degrees from the existing one. Fit one at 90 degrees instead. If you fit two at 180 the potential is for the hub to ‘Rock’ on the points of said set screws and become loose on the axle quite quickly. Two fitted at 90 degrees will push the axle tightly against the bore of the hub.

 

Doug.

[Jeff-C175 7,199]

It also appeats that someone put a hex head bolt in ther at some point indicating that there was a pre-existing condition.

 

Do not use bolts, or re-use set screws!  As Ranger has said, the second set screw needs to be 90 degrees around, not opposite.  Buy NEW set screws!

 

Also, it's highly likely that the axle shaft is boogered up too.  Loctite makes a product for repairing shafts called 660.  I used it on my 175 with the same problem as yours and it's still holding tight after more than five years.  I did install a new hub though which is what I would do if I were you.

 

Since you've got the hubs off, install new axle seals as well.

Edited May 29, 2021 by Jeff-C175

[Wheelhorse#1 1,642]

On 5/29/2021 at 7:15 PM, Jeff-C175 said:

It also appeats that someone put a hex head bolt in ther at some point indicating that there was a pre-existing condition.

 

Do not use bolts, or re-use set screws!  As Ranger has said, the second set screw needs to be 90 degrees around, not opposite.  Buy NEW set screws!

 

Also, it's highly likely that the axle shaft is boogered up too.  Loctite makes a product for repairing shafts called 660.  I used it on my 175 with the same problem as yours and it's still holding tight after more than five years.  I did install a new hub though which is what I would do if I were you.

 

Since you've got the hubs off, install new axle seals as well.

Thanks for all the advice.The bolts were already there and I assumed that’s how it was originally.I did think it was strange though because it made it difficult to reach and one bolt was longer.

 

I’ll replace with set screw , another  at 90 degrees  
The keyway looks good as well as the shaft doesn’t appear bent or anything on either side.

 

Part manual called for these to be used .3/8 -16x1 sq hd in hub

 

Edited May 31, 2021 by Wheelhorse#1

[Jeff-C175 7,199]

5 hours ago, Wheelhorse#1 said:

manual called for these

 

One more thing I just thought of...  

 

Those set screws should be torqued to 30 ft lb and you will NOT get them tight enough with an open end wrench.  You'll need an 8 point socket.

 

I'm convinced that most of the damaged hubs are caused by not properly tightening the set screws.

[Wheelhorse#1 1,642]

Having a hard time finding the screws.Checked all the local hardware box stores.Online only offers in bulk and expensive.Maybe tractor supply?  

[pfrederi 17,627]

[Jeff-C175 7,199]

25 minutes ago, Wheelhorse#1 said:

a hard time finding the screws

 

When all else fails, or even before then, McMaster Carr !  

 

Don't forget the 'stop bolts' or 'jam nuts' (whatever you want to call them), but you should be able to find those anywhere.

Edited June 3, 2021 by Jeff-C175

[Wheelhorse#1 1,642]

Great ,Thank you sir’s !

[WHX?? 48,701]

@Wheelhorse#1 I can fix those hubs , PM me if interested. I have been doing them for about forty bucks shipped and that includes set screws and jam nuns. 

Edited June 3, 2021 by WHX24

[Wheelhorse#1 1,642]

Thanks for the offer. However I was able to find a used hub in good shape for 40 bucks shipped . AZ tractor...good folks over there .

[Willie 14]

Using a good caliper I tried to measure the Woodruff key from one of my wheels. I have a1977 C120. It transaxle is 1 1/8 inch.

 

Woodruff Key, I think wheel horse used a flat bottom.

Width A .2495

Diameter B ?

Height C .5815

Length F 1.3470 shaved

 

this key was in bad shape.

 

anyone know which one from the above chart matches mine?

[gwest_ca-(File Mod) 11,019]

This one?

937108 key Woodruff #22 Long (1/4" x 1-3/8") in wheel/axle hub