× Post your interesting, useful and/or unique bush mechanics solutions here for others to smile at and maybe learn from.

Wheel nut taper angle?

More
21 Aug 2016 14:19 #2 by John and Bronwyn
John and Bronwyn replied the topic: Wheel nut taper angle?
Measured a few old nuts, included angle is very close to 90 degrees (+/- wear).

I think this is a standard light truck design? Alloys will be different (probably 60 degrees).

Please Log in or Create an account to join the conversation.

More
21 Aug 2016 14:27 #3 by Joseph Baz
Joseph Baz replied the topic: Wheel nut taper angle?
Peter,the most common angle for cone shape is 60 degrees,however this is not an absolute angle,most people confuse cone with dome fitting as a general rule(with exemptions) cone design is for alloys and dome for steel,hope haven't confused
Cheers,Joe

Please Log in or Create an account to join the conversation.

More
21 Aug 2016 14:31 #4 by Joseph Baz
Joseph Baz replied the topic: Wheel nut taper angle?
Sorry,forgot to ask if you were OKA specific? i do have some new nuts at the workshop that I can check in the morning to be sure
Cheers,Joe

Please Log in or Create an account to join the conversation.

More
21 Aug 2016 16:17 #5 by John and Bronwyn
John and Bronwyn replied the topic: Wheel nut taper angle?
Ex-Oka nuts I measured as 90 degrees were definitely taper (conical), not dome. And they were used with steel wheels.

Not sure they were original - they are a large nut, 28mm across flats. I don't have others to compare them with.
The following user(s) said Thank You: Joseph Baz

Please Log in or Create an account to join the conversation.

  • Peter_n_Margaret
  • Peter_n_Margaret's Avatar Topic Author
  • Away
More
21 Aug 2016 16:55 #6 by Peter_n_Margaret
Peter_n_Margaret replied the topic: Wheel nut taper angle?
Talking standard OKA.
I have some "as new" nuts. They are close to 90 degrees, but not exactly 90 degrees. Several degrees different.
That is what is causing my confusion.

Valves and valve seats are typically half a degree different. I wondered if wheel nuts and wheels are the same and what the specifications actually are......

Cheers,
Peter

Cheers, Peter.
OKA196 tinyurl.com/OKA196xtMotorhome
Mob.0428171214

Please Log in or Create an account to join the conversation.

More
22 Aug 2016 18:45 #7 by Joseph Baz
Joseph Baz replied the topic: Wheel nut taper angle?
Peter,John was spot on with the angle.
Cheers,Joe
Attachments:

Please Log in or Create an account to join the conversation.

  • Peter_n_Margaret
  • Peter_n_Margaret's Avatar Topic Author
  • Away
More
22 Aug 2016 20:13 #8 by Peter_n_Margaret
Peter_n_Margaret replied the topic: Wheel nut taper angle?

Joseph Baz wrote: Peter,John was spot on with the angle.
Cheers,Joe

Thanks Joe, but 89 is not 90 degrees, and is the wheel the same?
I would really like to see some specifications.....to be sure, to be sure..... :)

Cheers,
Peter

Cheers, Peter.
OKA196 tinyurl.com/OKA196xtMotorhome
Mob.0428171214

Please Log in or Create an account to join the conversation.

More
27 Aug 2016 06:55 #9 by Lang
Lang replied the topic: Wheel nut taper angle?
Peter

Does not help you I know but when I fitted the Ford alloy rims I wanted to keep the original steel wheels as an option so had the alloys reamed to the OKA nut angle. They were considerably different. Only problem is the alloys are thicker than the steels. For some reason the back studs are longer. Often have comments that the front nuts are not done up because the thread does not quite reach the top of the nut. I figure there is still plenty of grip length.

The engineering shop said 90 deg for the OKA taper (measured off the sample old nut I gave them.)

Lang

Please Log in or Create an account to join the conversation.

  • Peter_n_Margaret
  • Peter_n_Margaret's Avatar Topic Author
  • Away
More
27 Aug 2016 07:59 #10 by Peter_n_Margaret
Peter_n_Margaret replied the topic: Wheel nut taper angle?
Thanks Lang.
I have heard that it is a legal requirement that the nut goes all the way onto the stud.
Who was it that machined a tad off the nuts to comply with that? :)

Cheers,
Peter

Cheers, Peter.
OKA196 tinyurl.com/OKA196xtMotorhome
Mob.0428171214

Please Log in or Create an account to join the conversation.

More
28 Aug 2016 18:52 #11 by Lang
Lang replied the topic: Wheel nut taper angle?
Peter

It was an engineering shop in Paisley Ave Lawnton - will get their details.

Lang

Please Log in or Create an account to join the conversation.

More
29 Aug 2016 07:43 #12 by John and Bronwyn
John and Bronwyn replied the topic: Wheel nut taper angle?

Peter_n_Margaret wrote: I have heard that it is a legal requirement that the nut goes all the way onto the stud.


During 191's recent wheel changeover, I was told minimum requirement is 8 threads fully engaged.

Stud size is 5/8 UNF 18 tpi.

For this size stud the nearest I have been able to find is about 150 ft-lbs (200 N-m) tightening torque, based on standard engineering practice for an (assumed) grade 5 bolt. Does anyone have a better figure?

Please Log in or Create an account to join the conversation.

More
29 Aug 2016 10:25 #13 by TR
TR replied the topic: Wheel nut taper angle?
The XT service manual, Section 3 General Information page 5, specifies Wheel Nut torque to be 120 lb ft (161 Nm) Lubricated.

The LT service manual, Section 0 Shedualled Maintenance Information page 10, gives the same torques but elaborates lubricated to threads and faces.

Tim
OKA XT 124
The following user(s) said Thank You: John and Bronwyn

Please Log in or Create an account to join the conversation.

  • Peter_n_Margaret
  • Peter_n_Margaret's Avatar Topic Author
  • Away
More
31 Aug 2016 17:26 #14 by Peter_n_Margaret
Peter_n_Margaret replied the topic: Wheel nut taper angle?

TR wrote: The XT service manual, Section 3 General Information page 5, specifies Wheel Nut torque to be 120 lb ft (161 Nm) Lubricated.

The LT service manual, Section 0 Shedualled Maintenance Information page 10, gives the same torques but elaborates lubricated to threads and faces.

Tim
OKA XT 124

Yep.
Note "lubricated" - Most unusual.

Cheers,
Peter

Cheers, Peter.
OKA196 tinyurl.com/OKA196xtMotorhome
Mob.0428171214

Please Log in or Create an account to join the conversation.

More
01 Sep 2016 07:08 #15 by dandjcr
dandjcr replied the topic: Wheel nut taper angle?
Does "lubricated" really mean "anti-seize" rather than oil/grease?

What's the recommended product?

I wouldn't want a wheel coming loose through misinterpretation.

David

David and Janet Ribbans - Oka 148
Oka148 profile here.
Visit our technical and travel blogs: here.

Please Log in or Create an account to join the conversation.

More
01 Sep 2016 08:38 #16 by TR
TR replied the topic: Wheel nut taper angle?
I also was concerned about lubricating the thread and face when I first did it as it was contrary to all I had been taught about wheel nuts on heavy vehicles. In the short 3 years I have owned XT 124 I have always used a Penrite Copper Eze and a torque wrench set at 120 ft lb for all wheel nuts. In that time 124 has done about 35000 km, some on very corrugated roads, and has never had a wheel nut come loose.

Tim

Please Log in or Create an account to join the conversation.

  • Peter_n_Margaret
  • Peter_n_Margaret's Avatar Topic Author
  • Away
More
01 Sep 2016 08:42 #17 by Peter_n_Margaret
Peter_n_Margaret replied the topic: Wheel nut taper angle?
No, definitely don't use anti-seize is what I understand. I use a little chassis grease.

Cheers,
Peter

Cheers, Peter.
OKA196 tinyurl.com/OKA196xtMotorhome
Mob.0428171214

Please Log in or Create an account to join the conversation.

More
01 Sep 2016 15:53 #18 by OKAPETE
OKAPETE replied the topic: Wheel nut taper angle?
Whilst travelling in Oka 224 with Fifth wheeler I didn't have any wheel/tyre, stud/nut issues. Rotated wheels every 5000kms and I lubed studs with a spray of INOX.
Blessings. Pete.

Chaplain. Won x One Chaplaincy.
AM SAE-A. AAFRB.

Oka 224. 363. 383.

Please Log in or Create an account to join the conversation.

More
01 Sep 2016 16:59 #19 by Dave and Pauline Gray
Dave and Pauline Gray replied the topic: Wheel nut taper angle?
After a life time in the road transport industry definitely no grease just a spray of CRC or the like i have often used a light spray of Scram,we found grease attracts the dust and that ends up binding in the threads which can mean problems unscrewing,spider type truck wheels [held by taper wedges] and use a coarser thread could result in the stud unscrewing or even shearing when bound up with grease and dust so a wire brush is part of the removal tool kit.

Cheers Dave

Please Log in or Create an account to join the conversation.

More
01 Sep 2016 17:25 #20 by Joseph Baz
Joseph Baz replied the topic: Wheel nut taper angle?
True torque readings can only be archived with lubricated components other ways is not a true reading but a binding of the threads due to friction,grease as David said is not a good product as sand gets stuck and grit can damage surfaces,I use Engine assembly lube that's because I have more than half a tube left after engine assembly and goes a long way and may not be able to find it for the next engine.
Cheers,Joe

Please Log in or Create an account to join the conversation.

More
01 Sep 2016 18:43 #21 by Alister McBride
Alister McBride replied the topic: Wheel nut taper angle?
It's 90 degrees Peter, it's a fairly standard taper although i think OKA made their own, and fyi you can get domed nuts and just taper them in a lathe to 90 if you need, they seem to come out exactly the same dimensions as original OKA nuts (hmmm).

On anti-seize on wheelnut threads - don't do it! I got sick of trying to undo my nuts and tried it, some wheelnuts came loose for the few months afterwards until it dissipated a bit (what did i expect, slap forehead!). As Dave said, a bit of CRC every now and then... I also now mark the nut and wheel with a marker pen to easily see if nuts are staying put.

cheers, alister

Please Log in or Create an account to join the conversation.

Powered by Kunena Forum