|
|
|
|
| |
|
Grindwell
Norton Thread Grinding Wheels have been engineered
with precision for precision grinding; to meet productivity
as well as quality requirements.
|
|
|
|
|
|
|
|
|
|
|
|
Abrasive
|
Grit
|
Grade
|
Bond
|
|
|
SG
|
80
|
J
|
VB7M
|
|
|
|
|
|
|
38A
|
400
|
N
|
VMTAA
|
|
|
|
| |
|
 Dress
the form from point of wheel towards edges of
wheel for better maintenance of root width and
edge form.
Form
dressing, using diamond roll, always gives best
results on thread grinding
|
|
|
|
Pitch
Range Starting Specification
|
|
|
1
38A
320 - M VMTAA
|
|
1.25
38A
280 - L VMTAA
|
|
1.5
38A
220 - L VMTAA
|
|
1.75
38A
180 - K VMTAA
|
|
2.25
38A 150
- K VMTAA
|
|
3.0
38A
120 - K IOVH
|
|
4.0
38A
100 - IOVH
|
|
6.0
38A
80 - IOVH
|
|
Troubleshooting
Guide
|
|
Problem
|
Possible
Causes
|
Suggested
Correction
|
|
Burning/
discolouration
of workpiece |
–
Inadequate supply of coolant
– Too heavy infeed
– Too slow work speed
– Direction of cut |
–
Ensure coolant is directed at cutting
point
– Reduce amount of stock per pass
– Increase work speed and reduce infeed
proportionately
– Arrange cycle to finish on "Up- Cut"
|
|
Poor
finish or
chatter |
–
Diamond lines (evenly placed scratches)
– Surface roughness
– Scratches
– Out of balance wheel
– Work speed too high |
–
Use slower diamond feed or lighter
cut
– Use lighter cut or slower work speed
on finishing pass
– Clean grinding oil
– Retrieve and rebalance wheel
– Use slower work speed |
|
|
| |
External
thread grinding - taps, rolls
