nrgserv
Well-Known Member
- Posts
- 4,208
- Location
- shipley, west yorks.
that looks like a double roller bearing, not a taper roller bearing?
Hub stake nuts:Why so tight??
- Thread starter DIFFLOCK66
- Start date
This site contains affiliate links for which LandyZone may be compensated if you make a purchase.
jamesmartin
Well-Known Member
- Posts
- 91,879
- Location
- louth lincs
torque of the nut doesnt effect preload that already set yes you do need to tighten nut , but increasing torque doesnt increase set preload ,neither will nut not been torqued as tight
JordanTD5
Active Member
- Posts
- 262
- Location
- Ipswich, Suffolk or Dorking, Surrey
And?
You haven't answered the point. What "solid lump thru the center" were you refering to?
Were you talking about the hub? Are you trying to say the two bearings share a common inner race? Were you refering to the stub axel on a disco 1?
nrgserv
Well-Known Member
- Posts
- 4,208
- Location
- shipley, west yorks.
the splined lump thru the middle of a d2 assembly.
i'll press one out sometime.
item 3. its a solid lump.
JordanTD5
Active Member
- Posts
- 262
- Location
- Ipswich, Suffolk or Dorking, Surrey
the splined lump thru the middle of a d2 assembly.
i'll press one out sometime.
item 3. its a solid lump.
You can clearly see there is a clearance between the hub (3) and the drive shaft (7). Tightening the nut (5) DOES compress the two bearings.
nrgserv
Well-Known Member
- Posts
- 4,208
- Location
- shipley, west yorks.
yes, it holds them in compression, against the inner races of each other. you cant alter the preload, so why does the stake nut need to be so tight?
JordanTD5
Active Member
- Posts
- 262
- Location
- Ipswich, Suffolk or Dorking, Surrey
To get the bearings to the set preload. :doh:
They have no preload on them unless the hub nut is tightened. How can they?
Landrover has decided that the preload is correct when the inner races touch. It saves having to set it up the old fashioned way, but as you say makes it unadjustable.
Maybe I should have used the word "apply" as apposed to "set" the preload.
nrgserv
Well-Known Member
- Posts
- 4,208
- Location
- shipley, west yorks.
JordanTD5
Active Member
- Posts
- 262
- Location
- Ipswich, Suffolk or Dorking, Surrey
Tight is subjective.
The jesus nut that holds the main rotor head on an AH-64 Apache is done up finger tight and then backed off upto a 12th of a turn!
The jesus nut that holds the main rotor head on an AH-64 Apache is done up finger tight and then backed off upto a 12th of a turn!
nrgserv
Well-Known Member
- Posts
- 4,208
- Location
- shipley, west yorks.
JordanTD5
Active Member
- Posts
- 262
- Location
- Ipswich, Suffolk or Dorking, Surrey
A jesus nut is the name commonly given to the single large nut that holds the main or tail rotor onto a helicopter. It's so called because if it broke it would introduce the pilot to jesus.
nrgserv
Well-Known Member
- Posts
- 4,208
- Location
- shipley, west yorks.
JordanTD5
Active Member
- Posts
- 262
- Location
- Ipswich, Suffolk or Dorking, Surrey
Not normally.
The name is not important, the point is that its the only thing holding the rotor on and its done up finger tight.
TQ loadings can be surprising.
The short answer is "because landrover said so"
The name is not important, the point is that its the only thing holding the rotor on and its done up finger tight.
TQ loadings can be surprising.
The short answer is "because landrover said so"
DIFFLOCK66
Well-Known Member
- Posts
- 3,249
- Location
- Chipping, Lancashire
Well, I can confirm that the rear hub stake nut on my Disco is indeed done up firkin tight 
The Jesus bolt or nut is a sometimes mythological single fitment (sometimes, because it may be several fixings) holding a helicopter's main rotor hub on to the helicopter, which, if it fails prompts the pilot to exclaim JESUS!
Can be quite funny to see....if it's on a radio controlled model and not full size people-carrying helicopter
20090327 Raptor 50 Missing Jesus Bolt - YouTube
The Jesus bolt or nut is a sometimes mythological single fitment (sometimes, because it may be several fixings) holding a helicopter's main rotor hub on to the helicopter, which, if it fails prompts the pilot to exclaim JESUS!
Can be quite funny to see....if it's on a radio controlled model and not full size people-carrying helicopter
20090327 Raptor 50 Missing Jesus Bolt - YouTube
DIFFLOCK66
Well-Known Member
- Posts
- 3,249
- Location
- Chipping, Lancashire
Mr Noisy
Coming in your ears.
- Posts
- 10,146
- Location
- Altrincham, Cheshire
i normally do hub nuts up 'bastard tight'
that means as tight as i can reasonably get them without it feeling like it is hurting the threads and then stake them in
god knows why so much torque but i guess tightening torque increases exponentially with assembly tension
anyway, be reet.
that means as tight as i can reasonably get them without it feeling like it is hurting the threads and then stake them in
god knows why so much torque but i guess tightening torque increases exponentially with assembly tension
anyway, be reet.
Similar threads
