Knuckle Arm

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Category: Front Axle And Front Suspension

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Revision as of 03:43, 12 July 2015 ddgonzal (Talk | contribs) (->Overview) <- 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 =
-	There is only one size for B110, the 45mm strut type. But it comes in two versions: 1970-1975, and 1976-up.	+	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]].
		+	<br>{{Album|29464|was=Photo2\25282.jpg}}
-	[http://datsun1200.com/uploads/newbb/13022_4e3cbb95cad29.jpg photo]	+	Steering arm. The threaded bolt is to adjust the steering angle stop
-	<br><img size=320>http://datsun1200.com/uploads/newbb/13022_4e3cbb95cad29.jpg</img>	+	<br>{{Upload|13022_4e3cbb95cad29.jpg}}
-	H10 for small-bolt-pattern [[balljoint]]	+	Knuckle arm bolts to the bottom of the [[Strut]]
-	H74 for large-bolt-pattern ball joint	+	<br>{{UploadPost|174_5ca6e20bd6a2a.jpg|491099|was=Photo2/25282a.jpg}}
-		+
-	casting marks identify	+
-	[http://datsun1200.com/modules/myalbum/photo.php?lid=25611 http://datsun1200.com/uploads/thumbs/25611.jpg]	+
-	H74	+	Special shoulder bolt required to take up shear load
-	[http://datsun1200.com/modules/myalbum/photo.php?lid=25612 http://datsun1200.com/uploads/thumbs/25612.jpg] [http://datsun1200.com/modules/myalbum/photo.php?lid=25613 http://datsun1200.com/uploads/thumbs/25613.jpg]	+	<br>{{Album|26250|width=SM}}
-	W50	+	{{Album|14637}} {{Album|15173}}
-	[http://datsun1200.com/modules/myalbum/photo.php?lid=25891 http://datsun1200.com/uploads/thumbs/25891.jpg]	+
	Datsun knuckle arms come in two basic sizes, 75mm & 80mm:		Datsun knuckle arms come in two basic sizes, 75mm & 80mm:
Line 23:		Line 20:
	* 80mm wide bolt spacing for 50.8 mm strut tubes (used by most other Datsuns including 280ZX)		* 80mm wide bolt spacing for 50.8 mm strut tubes (used by most other Datsuns including 280ZX)
	* 91mm spacing on 240Z		* 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}}
-	[http://datsun1200.com/modules/myalbum/photo.php?lid=23761 http://datsun1200.com/uploads/photos/23761.jpg]	+	Bolted to the balljoints
		+	<br>{{Album|29471}}
-	Additionally, the size of the taper hole for the ball joint is important.	+	W50
-	* B110 and B210 and B310 small uses the small taper	+	<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}}
-	* Some B310 use a large taper	+
	= Quick Ratio Arm =		= Quick Ratio Arm =
-	Consider the length of the arm -- long arm give a slower steering response, but less effort is required to turn the wheels. Shorter arms give faster response.	+	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.		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.		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	+	Short-arm Modified for use with 2" struts
-	<br>[http://datsun1200.com/modules/myalbum/photo.php?lid=23760 http://datsun1200.com/uploads/thumbs/23760.jpg]	+	<br>{{Album|23760}}
	[http://www.pitroad-ts.com/A-parts-2/knuckle.htm Pitroad] sells modified quick steering arms.		[http://www.pitroad-ts.com/A-parts-2/knuckle.htm Pitroad] sells modified quick steering arms.
Line 46:		Line 57:
	It seems B310 with W5000/W5060 steering arm uses the same size tie-rod ends as the smaller units (B110 and B210).		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	+	* B310 small: rounded
-	<img size=240>http://datsun1200.com/uploads/photos/23728.jpg</img>	+	{{AlbumH|23728}}
-	* B310 large: knobbed	+	* B310 large: knobbed area around the ball joint hole
-	<img size=240>http://datsun1200.com/uploads/newbb/16973_5541cf499778a.jpg</img>	+	{{Upload|16973_5541cf499778a.jpg}}
	Knuckle Arm		Knuckle Arm
Line 58:		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 72:		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] <img size=140>http://datsun1200.com/uploads/newbb/16973_5541cf499778a.jpg</img>:[http://datsun1200.com/modules/newbb/viewtopic.php?post_id=467103#forumpost467103 post]	+	<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 =
		+	{{See|Front Axle Part Numbers}} {{See|Steering Linkage Part Numbers}}
		+
	steering arm		steering arm
	40052 = Knuckle Arm RH		40052 = Knuckle Arm RH
Line 87:		Line 105:
	Knuckle Arm RH		Knuckle Arm RH
-	* B10: 40052-18000 (different from newer models)	+	B10: {{searchPart|40052-18000}} (different from newer models)
-	* B110: 40052-H1000 < 40052-H5000	+	B110: {{searchPart|40052-H1000}} < {{searchPart|40052-H5000}}
-	* PB110: 40052-H2501	+	PB110: {{searchPart|40052-H2501}}
-	* 510: 40052-H2501 from 1972 510 > 40052-H2500 > 40052-A8600	+	510: {{searchPart|40052-H2501}} from 1972 510 > {{searchPart|40052-H2500}} > {{searchPart|40052-A8600}}
-	* B120: 40052-H5000 to 1974	+	B120: {{searchPart|40052-H5000}} to 1974
-	* B120: 40052-H7400 7510- <> 40052-H7440	+	B120: {{searchPart|40052-H7400}} 7510- <> {{searchPart|40052-H7440}}
-	* B210: 40052-H5000 (74-75 A12)	+	B210: {{searchPart|40052-H5000}} (74-75 A12)
-	* B210: 40052-H7400 (1976-up A engine, except USA)	+	B210: {{searchPart|40052-H7400}} (1976-up A engine, except USA)
-	* B210: 40052-U0101 (USA, also PB, also L16)	+	B210: {{searchPart|40052-U0101}} (USA, also PB, also L16)
-	* B310: 40052-W5000 (All US, all A15, most A14) <> 40052-W5060	+	B310: {{searchPart|40052-W5000}} (All US, all A15, most A14) <> 40052-W5060
-	* B310: 40052-H7400 (A12, A13, and budget A14 models)	+	B310: {{searchPart|40052-H7400}} (A12, A13, and budget A14 models)
-	* A10: 40052-W5000 ALL <> 40052-W5060	+	A10: {{searchPart|40052-W5000}} ALL <> {{searchPart|40052-W5060}}
-	[http://datsun1200.com/modules/myalbum/photo.php?lid=23731 http://datsun1200.com/uploads/thumbs/23731.jpg]	+	Knuckle arms bolted to ball joints
		+	<br>{{Album|23731}}
	== W50 ==		== W50 ==
Line 112:		Line 131:
	JAPAN B310		JAPAN B310
-	[http://datsun1200.com/modules/myalbum/photo.php?lid=25892 http://datsun1200.com/uploads/thumbs/25892.jpg]	+	{{Album|25892}}
-	40052-H7400 ARM-KNUCKLE RH	+	{{searchPart|40052-H7400}} ARM-KNUCKLE RH
	ALL round headlight except GX#,Wagon		ALL round headlight except GX#,Wagon
	S,K.A12A/A13 square headlight		S,K.A12A/A13 square headlight
	Van		Van
-	40052-W5000 <> 40052-W5060	+	{{searchPart|40052-W5000}} <> {{searchPart|40052-W5060}}
	GX# round headlight (OPTION)		GX# round headlight (OPTION)
	S,K.A14/A15 square headlight		S,K.A14/A15 square headlight
Line 130:		Line 149:
	12 x 4J SILVER		12 x 4J SILVER
	13 x 4.5J SILVER		13 x 4.5J SILVER
-	40300-W8300 S,K,W square headlight S/# 40300-W5700	+	{{searchPart|40300-W8300}} S,K,W square headlight S/# {{searchPart|40300-W5700}}
	GX# round headlight		GX# round headlight
	W.GL round headlight		W.GL round headlight
-	40300-U7400 W.DX round headlight	+	{{searchPart|40300-U7400}} W.DX round headlight
-	13 x 5 alloy Type B 40300-U7527/40300-U7528 (W/KEY)	+	13 x 5 alloy Type B {{searchPart|40300-U7527}}/{{searchPart|40300-U7528}} (W/KEY)
	OPTION for W		OPTION for W
	OPTION for GX round headlight		OPTION for GX round headlight
	OPTION for S,K.A14/A15		OPTION for S,K.A14/A15
-	13 x 5 alloy Type C 40300-W6027/40300-W6028 (W/KEY)	+	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 address the change in front roll instant center.		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.
-	See main article: [[Roll Center Adjusters]]	+	{{Main|Roll Center Adjusters}}
-	http://datsun1200.com/uploads/thumbs/16496.jpg http://datsun1200.com/uploads/thumbs/23732.jpg	+	{{AlbumH!|16496}} {{AlbumH!|23732}}
-	&#12490;&#12483;&#12463;&#12523; &#12450;&#12540;&#12512;	+	{{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;}}
-	[[Category:Front Axle And Front Suspension]]	+	[[Category:Front Axle And Front Suspension]]{{End}}

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Current revision

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

Contents 1 Overview 2 Quick Ratio Arm 3 Comparison 4 Part Numbers 4.1 W50 4.2 B310 4.3 Bolts 5 Spacers

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.
Album 29464

Steering arm. The threaded bolt is to adjust the steering angle stop
Upload click to view

Knuckle arm bolts to the bottom of the Strut
Post 491099

Special shoulder bolt required to take up shear load
Album 26250

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
Album 25611

H74
Album 25612 Album 25613 Album 29470

Bolted to the balljoints
Album 29471

W50
Album 29467 Album 29466 Album 29465 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
Album 23760

Pitroad sells modified quick steering arms.

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 
  Album 23728
* B310 large: knobbed area around the ball joint hole
  Upload click to view

Knuckle Arm

B120 early +H1000/H1025 rod assy
H1000/H5000

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

H7440
Album 23726 Album 23727 Album 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
Album 23723 Album 23724 Album 23725

W5000/W5060 power cars

B310 Steering Knuckle Arms
Album 16436 Post 467103

B310
Album 3890

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
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
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)

Bolts

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.
Post 498145 Post 498145

Album 29468 Album 29469

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.

ナックル アームᴳ 

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