Page 55 - YG 2019

RECOMMENDED CUTTING CONDITIONS

RECOMMENDED COOLANT PRESSURE
AND FLOW RATE ON VERTICAL DRILLING CARBIDE Being the best through innovation

[psi] [G.P.M]
200 11.0
- Recommended emulsion mix is 6% - 8%.
190 8.5
- For Drilling in Stainless and High Strength steels,
175 7.0
a mix of 10% is recommended.
160 6.0 - For horizontal drilling, 30% reduction on
145 4.5 the coolant pressure and flow rate is possible.
130 3.0 - Dry drilling is possible for 1-2xD drilling.
But not recommended.
115 2.0

.4724 .6299 .7874 .9449 1.1024 1.2500
inch

TROUBLE SHOOTING

1) Heavy flank wear 2) Chipping on cutting edge
/ Fast flank wear - Reduce feed
- Reduce cutting speed - Check the rigidity of spindle and
- Increase feed chuck
- Rigid clamping of workpiece

3) Build up on cutting edge 4) Chipping or break down on
- Increase cutting speed outer corner
- Use a coated insert - Reduce feed
- Rigid clamping of workpiece

5) Wear of land margin 6) Unsatisfactory positioning DREAM DRILLS
- Rigid clamping of of the hole
workpiece - Rigid clamping of workpiece
- Reduce cutting speed - Reduce feed during entrance or
- Increase coolant flow exit -GENERAL

7) Scratching on holder 8) Unsatisfactory surface finish
- Rigid clamping of - Rigid clamping of workpiece
workpiece - Increase coolant flow and
- Reduce feed pressure
- Increase coolant flow WITH & WITHOUT COOLANT HOLES
- General Purpose HRc30 to HRc50 Alloys

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