Accuracy of Self Centring Chucks

Test No.
Test Applied
Over
Size of chuck Upto and Including
Permissible Deviation
in mm
1
Accuracy of Grip on Test Bar

(Using Master Pinion)
  160mm X=50mm
160mm 250mm X=50mm 
250mm 400mm X=75mm
400mm 600mm X=100mm
0.040
0.060
0.075
0.100
 
1

Accuracy of Grip on Test Bar

(Using Any Pinion)
  160mm X=50mm
160mm 250mm X=50mm 
250mm 400mm X=75mm
400mm 600mm X=100mm
0.080
0.080
0.100
0.150
 
2
&
3

Accuracy of Grip on Test
Rings when gripped
internally or Externally

(Using Master Pinion)
  160mm  
160mm 250mm  
250mm 400mm  
400mm 600mm  
0.030
0.040
0.060
0.075
 
2
&
3

Accuracy of Grip on Test
Rings on the Face of Ring
  160mm  
160mm 250mm  
250mm 400mm  
400mm 600mm  
0.025
0.030
0.040
0.050
 
4

Concentricity of Outside
Diameter
  160mm  
160mm 250mm  
250mm 400mm  
400mm 600mm  
0.030
0.040
0.060
0.080