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[Datsun 1200 encyclopedia]

Knuckle Arm

(Difference between revisions)

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Category: Front Axle And Front Suspension
Revision as of 07:24, 13 August 2011
ddgonzal (Talk | contribs)
(->Spacers)
<- Previous diff		 Current revision
ddgonzal (Talk | contribs)

Line 1: Line 1:
-The "Knuckle arm" (steering arm) is sandwiched between the [[Ball Joint]] and the strut assembly. +The "'''Knuckle arm'''" (steering arm) is sandwiched between the [[Ball Joint]] and the [[Struts|Strut]] assembly.
= Overview = = Overview =
-Datsun knuckle arms come in two basic sizes, 70mm & ??:+Knuckle arm also known as "steering arm". It turns the strut to which the front wheel is bolted, thus steering the vehicle. The arm is pushed/pulled by the [[Steering_Linkage#Side_Rods|tie-rod]] of the [[Steering Linkage]].
-* narrow bolt spacing for 45mm strut tubes (used by B110)+<br>{{Album|29464|was=Photo2\25282.jpg}}
-* wide bolt spacing for 50.8 mm strut tubes (used by most other Datsuns)+
-[http://datsun1200.com/uploads/newbb/13022_4e3cbb95cad29.jpg http://ddgonzal.members.winisp.net/getThumb.aspx?width=400&uri=http://datsun1200.com/uploads/newbb/13022_4e3cbb95cad29.jpg]+Steering arm. The threaded bolt is to adjust the steering angle stop
 +<br>{{Upload|13022_4e3cbb95cad29.jpg}}
-Additionally, the size of the taper hole for the ball joint is important.+Knuckle arm bolts to the bottom of the [[Strut]]
-* B110 and B210 uses the small taper+<br>{{UploadPost|174_5ca6e20bd6a2a.jpg|491099|was=Photo2/25282a.jpg}}
-* Some B310 use a large taper+
-Then there is the length of the arm -- long arm give a slower steering response, but less effort is required to turn the wheels. Short arms give faster response.+Special shoulder bolt required to take up shear load
 +<br>{{Album|26250|width=SM}}
-The good news is there is only one size for B110. See the part numbers below.+{{Album|14637}} {{Album|15173}}
 + 
 +Datsun knuckle arms come in two basic sizes, 75mm & 80mm:
 +* 75mm narrow bolt spacing for 45mm strut tubes (used by B110)
 +* 80mm wide bolt spacing for 50.8 mm strut tubes (used by most other Datsuns including 280ZX)
 +* 91mm spacing on 240Z
 +{{Album-|23761}}
 + 
 +There is only one size for 1200, to fit 45mm strut type. But it comes in two versions: 1970-1975, and 1976-up.
 + 
 + H10 [[balljoint]] (small taper)
 + * for small-bolt-pattern [[LCA]] (B110, early 120Y)
 + 
 + H74 balljoint (large taper)
 + * fits large-bolt-pattern [[LCA]] (late 120Y/B120/B310)
 +
 +casting marks identify
 +<br>{{Album|25611}}
 + 
 +H74
 +<br>{{Album|25612}} {{Album|25613}} {{Album|29470|was=Photo\H7400.jpg\Datsun%201200/Parts}}
 + 
 +Bolted to the balljoints
 +<br>{{Album|29471}}
 + 
 +W50
 +<br>{{Album|29467|was=Photo\40052-W50-3.jpg\Datsun%201200/Parts}} {{Album|29466|was=Photo\40052-W50-2.jpg\Datsun%201200/Parts}} {{AlbumH|29465|was=Photo\40052-W50-1.jpg\Datsun%201200/Parts}} {{Album|25891}}
 + 
 += Quick Ratio Arm =
 +Consider the length of the arm: long arm gives a slower steering response, but less effort is required to turn the wheels. Shorter arms give faster response.
 + 
 +Change the length of the steering arm without changing the steering idle arm length will impact the front suspension bump steer characteristics.
 + 
 +Unfortunately the large-size B310 arm (commonly used when swapping struts) will change your 15:1 steering to an effective 16:1 as the arm is 7% longer. Even worse, when putting 2" struts in a 45mm B310 vehicle, the stock B310 16.4:1 steering will effectively turn into a slow 17.6:1.
 + 
 +Short-arm Modified for use with 2" struts
 +<br>{{Album|23760}}
 + 
 +[http://www.pitroad-ts.com/A-parts-2/knuckle.htm Pitroad] sells modified quick steering arms.
= Comparison = = Comparison =
-It seems only B310 with W5000/W5060 steering arm uses the larger tie-rod ends.+It seems B310 with W5000/W5060 steering arm uses the same size tie-rod ends as the smaller units (B110 and B210).
 + 
 + * B310 small: rounded
 + {{AlbumH|23728}}
 + * B310 large: knobbed area around the ball joint hole
 + {{Upload|16973_5541cf499778a.jpg}}
Knuckle Arm Knuckle Arm
Line 26: Line 69:
H7400 -8507 H7400 -8507
H7440 8508- H7440 8508-
- [http://datsun1200.com/modules/myalbum/photo.php?lid=23726 http://datsun1200.com/uploads/thumbs/23726.jpg] [http://datsun1200.com/modules/myalbum/photo.php?lid=23727 http://datsun1200.com/uploads/thumbs/23727.jpg] [http://datsun1200.com/modules/myalbum/photo.php?lid=23728 http://datsun1200.com/uploads/thumbs/23728.jpg] + 
 +H7440
 +<br>{{AlbumH|23726}} {{AlbumH|23727}} {{AlbumH|23728}}
B210 early +H5025 B210 early +H5025
Line 40: Line 85:
B310 +W5025 rod assy B310 +W5025 rod assy
H7400 regular cars H7400 regular cars
- [http://datsun1200.com/modules/myalbum/photo.php?lid=23723 http://datsun1200.com/uploads/thumbs/23723.jpg] [http://datsun1200.com/modules/myalbum/photo.php?lid=23724 http://datsun1200.com/uploads/thumbs/23724.jpg] [http://datsun1200.com/modules/myalbum/photo.php?lid=23725 http://datsun1200.com/uploads/thumbs/23725.jpg] + 
 +H74
 +<br>{{AlbumH|23723}} {{AlbumH|23724}} {{AlbumH|23725}}
 +
W5000/W5060 power cars W5000/W5060 power cars
B310 Steering Knuckle Arms B310 Steering Knuckle Arms
-<br>[http://datsun1200.com/modules/myalbum/photo.php?lid=16436 http://datsun1200.com/uploads/thumbs/16436.jpg]+<br>{{Album|16436}} {{UploadPost|16973_5541cf499778a.jpg|467103}}
B310 B310
-<br>[http://datsun1200.com/modules/myalbum/photo.php?lid=3890 http://datsun1200.com/uploads/thumbs/3890.jpg]+<br>{{Album|3890}}
= Part Numbers = = Part Numbers =
-steering arm+{{See|Front Axle Part Numbers}} {{See|Steering Linkage Part Numbers}}
-<br>40052 = Knuckle Arm RH +
-<br>40053 = Knuckle Arm LH+
-Knuckle Arm RH+ steering arm
-* B10: 40052-18000 (different from newer models)+ 40052 = Knuckle Arm RH
-* B110: 40052-H1000 <- 40052-H5000+ 40053 = Knuckle Arm LH
-* PB110: 40052-H2501+
-* B120: 40052-H5000 to 1974, 40052-H7400 (75-8504), 40052-H7440 (8504-)+
-* B210: 40052-H5000 (74-75 A12)+
-* B210: 40052-H7400 (1976-up A engine, except USA)+
-* B210: 40052-U0101 (USA, also PB, also L16)+
-* B310: 40052-W5000 (All US, all A15, most A14)+
-* B310: 40052-H7200 (A12, A13, and budget A14 models)+
-* B310: 40052-W5060 (big engines, 8001-up)+
-[http://datsun1200.com/modules/myalbum/photo.php?lid=23731 http://datsun1200.com/uploads/thumbs/23731.jpg] + Knuckle Arm RH
 + B10: {{searchPart|40052-18000}} (different from newer models)
 + B110: {{searchPart|40052-H1000}} < {{searchPart|40052-H5000}}
 + PB110: {{searchPart|40052-H2501}}
 + 510: {{searchPart|40052-H2501}} from 1972 510 > {{searchPart|40052-H2500}} > {{searchPart|40052-A8600}}
 + B120: {{searchPart|40052-H5000}} to 1974
 + B120: {{searchPart|40052-H7400}} 7510- <> {{searchPart|40052-H7440}}
 + B210: {{searchPart|40052-H5000}} (74-75 A12)
 + B210: {{searchPart|40052-H7400}} (1976-up A engine, except USA)
 + B210: {{searchPart|40052-U0101}} (USA, also PB, also L16)
 + B310: {{searchPart|40052-W5000}} (All US, all A15, most A14) <> 40052-W5060
 + B310: {{searchPart|40052-H7400}} (A12, A13, and budget A14 models)
 + A10: {{searchPart|40052-W5000}} ALL <> {{searchPart|40052-W5060}}
 + 
 +Knuckle arms bolted to ball joints
 +<br>{{Album|23731}}
 + 
 +== W50 ==
 + * 1977-1981 A10 Stanza/510
 + * 1978-1982 B310 fitted with 13" wheels
 + 
 +== B310 ==
 + CANADA B310
 + H74 - A12A cars
 + W50 - A14/A15
 + 
 + JAPAN B310
 + {{Album|25892}}
 + {{searchPart|40052-H7400}} ARM-KNUCKLE RH
 + ALL round headlight except GX#,Wagon
 + S,K.A12A/A13 square headlight
 + Van
 + {{searchPart|40052-W5000}} <> {{searchPart|40052-W5060}}
 + GX# round headlight (OPTION)
 + S,K.A14/A15 square headlight
 + Wagon
 +
 + USA B310
 + W50 - all [including A12A-powered cars]
 + 
 + Compare W50 arm use with the 13" wheel fitment
 + WHEEL ASS'Y-ROAD B310 JAPAN
 + 12 x 4J GRAY
 + 12 x 4J SILVER
 + 13 x 4.5J SILVER
 + {{searchPart|40300-W8300}} S,K,W square headlight S/# {{searchPart|40300-W5700}}
 + GX# round headlight
 + W.GL round headlight
 + {{searchPart|40300-U7400}} W.DX round headlight
 + 13 x 5 alloy Type B {{searchPart|40300-U7527}}/{{searchPart|40300-U7528}} (W/KEY)
 + OPTION for W
 + OPTION for GX round headlight
 + OPTION for S,K.A14/A15
 + 13 x 5 alloy Type C {{searchPart|40300-W6027}}/{{searchPart|40300-W6028}} (W/KEY)
 + 
 +== Bolts ==
 +{{See|Front Axle Part Numbers}}
 + 
 + {{searchPart|40055-H1000}} BOLT-KNUCKLE ARM 44mm
 + [[NES#9-11_Hex_Nuts|08911-64010]] NUT-HEX M10x1.25 High, medium carbon steel (2 each side)
 + [[NES#9-15_Washers|08915-14010]] WASHER-SPRING lock medium M10 (2 per side)
 + 
 +The 44mm bolt replaced the earlier 38mm long version which was used on one side. After 1973 February the long bolt was used on each side.
 +<br>{{UploadPost|14333_65928ea9afc60.jpg|498145}} {{UploadPost|14333_65928eb86736b.jpg|498145}}
 + 
 +{{Album|29468}} {{Album|29469}}
= Spacers = = Spacers =
-When [[Lowering]] the front suspension, if going ultra-low, strut spacers (roll center adapters) are used. They are intended to correct the lower arm angle when the vehicle height is dropped, to minimize bump steer.+When [[Lowering]] the front suspension, if going ultra-low, strut spacers (roll center adapters) are used. They are intended to correct the lower arm angle when the vehicle height is dropped to address the change in front roll instant center.
 + 
 +{{Main|Roll Center Adjusters}}
-[http://datsun1200.com/modules/myalbum/photo.php?lid=16496 http://datsun1200.com/uploads/thumbs/16496.jpg] [http://datsun1200.com/modules/myalbum/photo.php?lid=23732 http://datsun1200.com/uploads/thumbs/23732.jpg]+{{AlbumH!|16496}} {{AlbumH!|23732}}
 +{{search|%E3%82%B5%E3%83%8B%E3%83%BCB110%E3%83%8A%E3%83%83%E3%82%AF%E3%83%AB%20%E3%82%A2%E3%83%BC%E3%83%A0|&#12490;&#12483;&#12463;&#12523; &#12450;&#12540;&#12512;}}
-&#12525;&#12540;&#12523;&#12475;&#12531;&#12479;&#12540;&#12450;&#12480;&#12503;&#12479;+[[Category:Front Axle And Front Suspension]]{{End}}

Current revision

The "Knuckle arm" (steering arm) is sandwiched between the Ball Joint and the Strut assembly.

Contents

[edit]

Overview

Knuckle arm also known as "steering arm". It turns the strut to which the front wheel is bolted, thus steering the vehicle. The arm is pushed/pulled by the tie-rod of the Steering Linkage.
29464.jpgAlbum 29464

Steering arm. The threaded bolt is to adjust the steering angle stop
13022_4e3cbb95cad29.jpgUpload click to view

Knuckle arm bolts to the bottom of the Strut
174_5ca6e20bd6a2a.jpgPost 491099

Special shoulder bolt required to take up shear load
26250.jpgAlbum 26250

14637.jpgAlbum 14637 15173.jpgAlbum 15173

Datsun knuckle arms come in two basic sizes, 75mm & 80mm:

  • 75mm narrow bolt spacing for 45mm strut tubes (used by B110)
  • 80mm wide bolt spacing for 50.8 mm strut tubes (used by most other Datsuns including 280ZX)
  • 91mm spacing on 240Z

23761.jpgAlbum 23761

There is only one size for 1200, to fit 45mm strut type. But it comes in two versions: 1970-1975, and 1976-up. 

H10 balljoint (small taper)
* for small-bolt-pattern LCA (B110, early 120Y)

H74 balljoint (large taper)
* fits large-bolt-pattern LCA (late  120Y/B120/B310)

casting marks identify
25611.jpgAlbum 25611

H74
25612.jpgAlbum 25612 25613.jpgAlbum 25613 29470.jpgAlbum 29470

Bolted to the balljoints
29471.jpgAlbum 29471

W50
29467.jpgAlbum 29467 29466.jpgAlbum 29466 29465.jpgAlbum 29465 25891.jpgAlbum 25891

[edit]

Quick Ratio Arm

Consider the length of the arm: long arm gives a slower steering response, but less effort is required to turn the wheels. Shorter arms give faster response.

Change the length of the steering arm without changing the steering idle arm length will impact the front suspension bump steer characteristics.

Unfortunately the large-size B310 arm (commonly used when swapping struts) will change your 15:1 steering to an effective 16:1 as the arm is 7% longer. Even worse, when putting 2" struts in a 45mm B310 vehicle, the stock B310 16.4:1 steering will effectively turn into a slow 17.6:1.

Short-arm Modified for use with 2" struts
23760.jpgAlbum 23760

Pitroad sells modified quick steering arms.

[edit]

Comparison

It seems B310 with W5000/W5060 steering arm uses the same size tie-rod ends as the smaller units (B110 and B210). 

* B310 small: rounded 
  23728.jpgAlbum 23728
* B310 large: knobbed area around the ball joint hole
  16973_5541cf499778a.jpgUpload click to view

Knuckle Arm 

B120 early +H1000/H1025 rod assy
H1000/H5000

B120 7510- +H1025 rod assy
H7400 -8507
H7440 8508-

H7440
23726.jpgAlbum 23726 23727.jpgAlbum 23727 23728.jpgAlbum 23728 

B210 early +H5025
H5000
H7400 late van

B210 late +H5025 rod assy
H7400

PB210/USA B210 +H5800 rod assy
U0101

B310 +W5025 rod assy
H7400 regular cars

H74
23723.jpgAlbum 23723 23724.jpgAlbum 23724 23725.jpgAlbum 23725 

W5000/W5060 power cars

B310 Steering Knuckle Arms
16436.jpgAlbum 16436 16973_5541cf499778a.jpgPost 467103

B310
3890.jpgAlbum 3890

[edit]

Part Numbers

See also: Front Axle Part Numbers
See also: Steering Linkage Part Numbers
steering arm
40052 = Knuckle Arm RH 
40053 = Knuckle Arm LH

Knuckle Arm RH
 B10: 40052-18000ᴳ (different from newer models)
 B110: 40052-H1000ᴳ < 40052-H5000ᴳ
PB110: 40052-H2501ᴳ
  510: 40052-H2501ᴳ from 1972 510 > 40052-H2500ᴳ > 40052-A8600ᴳ
 B120: 40052-H5000ᴳ to 1974
 B120: 40052-H7400ᴳ 7510- <> 40052-H7440ᴳ
 B210: 40052-H5000ᴳ (74-75 A12)
 B210: 40052-H7400ᴳ (1976-up A engine, except USA)
 B210: 40052-U0101ᴳ (USA, also PB, also L16)
 B310: 40052-W5000ᴳ (All US, all A15, most A14) <> 40052-W5060
 B310: 40052-H7400ᴳ (A12, A13, and budget A14 models)
  A10: 40052-W5000ᴳ ALL <> 40052-W5060ᴳ

Knuckle arms bolted to ball joints
23731.jpgAlbum 23731

[edit]

W50 

* 1977-1981 A10 Stanza/510
* 1978-1982 B310 fitted with 13" wheels
[edit]

B310 

CANADA B310
H74 - A12A cars
W50 - A14/A15

JAPAN B310
25892.jpgAlbum 25892
40052-H7400ᴳ ARM-KNUCKLE RH
  ALL round headlight except GX#,Wagon
  S,K.A12A/A13 square headlight
  Van
40052-W5000ᴳ <> 40052-W5060ᴳ
  GX# round headlight (OPTION)
  S,K.A14/A15 square headlight
  Wagon
   
USA B310
W50 - all [including A12A-powered cars]

Compare W50 arm use with the 13" wheel fitment
WHEEL ASS'Y-ROAD B310 JAPAN
12 x 4J GRAY
12 x 4J SILVER
13 x 4.5J SILVER
  40300-W8300ᴳ S,K,W square headlight S/# 40300-W5700ᴳ
              GX# round headlight
              W.GL round headlight
  40300-U7400ᴳ W.DX round headlight
13 x 5 alloy Type B 40300-U7527ᴳ/40300-U7528ᴳ (W/KEY)
  OPTION for W
  OPTION for GX round headlight
  OPTION for S,K.A14/A15
13 x 5 alloy Type C 40300-W6027ᴳ/40300-W6028ᴳ (W/KEY)
[edit]

Bolts

See also: Front Axle Part Numbers
40055-H1000ᴳ BOLT-KNUCKLE ARM 44mm
08911-64010 NUT-HEX M10x1.25 High, medium carbon steel (2 each side)
08915-14010 WASHER-SPRING lock medium M10 (2 per side)

The 44mm bolt replaced the earlier 38mm long version which was used on one side. After 1973 February the long bolt was used on each side.
14333_65928ea9afc60.jpgPost 498145 14333_65928eb86736b.jpgPost 498145

29468.jpgAlbum 29468 29469.jpgAlbum 29469

[edit]

Spacers

When Lowering the front suspension, if going ultra-low, strut spacers (roll center adapters) are used. They are intended to correct the lower arm angle when the vehicle height is dropped to address the change in front roll instant center.

Main: Roll Center Adjusters

16496.jpg 23732.jpg

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