Front Axle Alignment
Toe
Camber
Caster
King Pin Inclination
(KPI)
Turning Radius
Axle Setback
TURNING
RADIUS
IS A DESIGN ANGLE
|
Ackermann Steering Principle Turning
Alignment |
| Can
be a big tire wear problem when a lot of turning is required or if improperly designed. |
 |
Contangent IT = Contangent
OT - WT/WB
TURNING
RADIUS
IN DEGREES
|
(WT) |
(Tire Centerline To Tire Centerline in Inches) |
| 40 | 50 | 60 | 70 | |||
|
|
80 | 24.0 | 25.2 | 26.6 | 28.1 | To determine a vehicle's turning radius: |
| (WB) | 100 | 23.1 | 24.0 | 25.0 | 26.0 | 1. Measure WT (See sketch A) |
|
Wheel |
120 | 22.5 | 23.2 | 24.0 | 24.8 | 2. Measure WB (See sketch B) |
|
Base |
140 | 22.1 | 22.7 | 23.3 | 24.0 | 3. Read intersection of WT and WB |
| In. | 160 | 21.8 | 22.3 | 22.9 | 23.4 | for turning radius |
|
(WT) |
(Tire Centerline To Tire Centerline in Inches) |
| 72 | 76 | 78 | 80 | 82 | 86 | 90 | 94 | ||
| 80 | 28.4 | 29.1 | 29.4 | 29.8 | 30.1 | 30.9 | 31.7 | 32.5 | |
| 100 | 26.3 | 26.7 | 26.9 | 27.2 | 27.4 | 27.9 | 28.4 | 29.0 | |
| 120 | 25.0 | 25.3 | 25.5 | 25.7 | 25.9 | 26.2 | 26.6 | 27.0 | |
| 130 | 24.5 | 24.8 | 25.0 | 25.1 | 25.3 | 25.6 | 26.0 | 26.3 | |
|
|
140 | 24.1 | 24.4 | 24.5 | 24.7 | 24.8 | 25.1 | 25.4 | 25.7 |
|
(WB)
|
150 | 23.8 | 24.1 | 24.2 | 24.3 | 24.4 | 24.7 | 25.0 | 25.2 |
|
Wheel
|
160 | 23.5 | 23.8 | 23.9 | 24.0 | 24.1 | 24.4 | 24.6 | 24.8 |
|
Base |
170 | 23.3 | 23.5 | 23.6 | 23.7 | 23.8 | 24.0 | 24.3 | 24.5 |
|
In.
|
180 | 23.1 | 23.3 | 23.4 | 23.5 | 23.6 | 23.8 | 24.0 | 24.2 |
| 190 | 229 | 23.1 | 23.2 | 23.3 | 23.4 | 23.6 | 23.7 | 23.9 | |
| 200 | 22.7 | 22.9 | 23.0 | 23.1 | 23.2 | 23.3 | 23.5 | 23.7 | |
| 210 | 22.6 | 22.7 | 22.8 | 22.9 | 23.0 | 23.2 | 23.3 | 23.5 | |
| 220 | 22.5 | 22.6 | 22.7 | 22.8 | 22.8 | 23.0 | 23.2 | 23.3 | |
| 240 | 22.2 | 22.4 | 22.4 | 22.5 | 22.6 | 22.7 | 22.9 | 23.0 | |
| 260 | 22.0 | 22.2 | 22.2 | 22.3 | 22.4 | 22.5 | 22.6 | 22.7 |
