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- MZE / MZS Drills (Zet1 Drill)
MZE / MZS DRILLS (ZET1 DRILL)
CAUTION FOR USE
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| Spot facing as shown above is not possible due to the large diameter not having a back taper. Please contact us if spot face drills are required. | Chips from the chamfer machining tend to be elongated and may cause jamming. It is recommended to pick feed to reduce the length of chips. | Cutting resistance increases on initial contact with the chamfer. Reduce feed at this point. | The width of the chamfer is C1.0 for M4─M6, and C1.5 for M8─M12. For widths other than those stated above please contact us. |
DRILL SIZE AND HOLE DIAMETERS FOR TAPPING
| For Metric Coarse Screw Thread | ||||
|---|---|---|---|---|
| Thread Size | Initial Thread Diameter Tolerance | MZE/MZS Drill Application (øD) |
Reference HSS Drill | |
| max. | min. | |||
| M2.5x0.45 | 2.138 | 2.013 | 2.1 | 2.1 |
| M3x0.5 | 2.599 | 2.459 | 2.5 | 2.5 |
| M3.5x0.6 | 3.010 | 2.850 | 2.9 | 2.9 |
| M4x0.7 | 3.422 | 3.242 | 3.4 | 3.3 |
| M4.5x0.75 | 3.878 | 3.688 | 3.8 | 3.8 |
| M5x0.8 | 4.334 | 4.134 | 4.3 | 4.2 |
| M6x1 | 5.153 | 4.917 | 5.1 | 5.0 |
| M7x1.25 | 6.153 | 5.917 | 6.1 | 6.0 |
| M8x1.25 | 6.912 | 6.647 | 6.8 | 6.8 |
| M9 X 1.25 | 7.912 | 7.647 | 7.8 | 7.8 |
| M10 X 1.5 | 8.676 | 8.376 | 8.5 | 8.5 |
| M11 X 1.5 | 9.676 | 9.376 | 9.5 | 9.5 |
| M12 X 1.75 | 10.441 | 10.106 | 10.3 | 10.3 |
| M14 X 2 | 12.210 | 11.835 | 12.0 | 12.0 |
| M16 X 2 | 14.210 | 13.835 | 14.0 | 14.0 |
| M18 X 2.5 | 15.744 | 15.294 | 15.5 | 15.5 |
| M20 X 2.5 | 17.744 | 17.294 | 17.5 | 17.5 |
| M22 X 2.5 | 19.744 | 19.294 | 19.5 | 19.5 |
- Note:
- Holes drilled with an MZE type drill should be +0.01-+0.03mm oversize.
For thread tapping and replacement of HSS drills, a drill approximately 0.1mm bigger is recommended.
OPERATIONAL GUIDANCE
Drill Holding
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Drill Length
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Drill Installation
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Installation Tolerance
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Coolant Method (MZE)
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Through Coolant Type (MZS)
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Drill Installation
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Coolant Handling
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Thin Workpiece
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Interrupted Cutting
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Stepped Holes
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Burring and Workpiece Chipping
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CAUTION TO USE MZS TYPE (Drill Diameter ≤ Ø3)
- Please use a fine mesh filter (mesh≤3µm) for coolant to prevent jamming in the oil hole.
- For deep drilling
(l/d>3) ,
machining guiding hole is recommended.
(Use MZE
SA type for guiding hole.)
- Pick drilling is also effective.
CUTTING RESISTANCE
Workpiece: JIS SCM440(300HB) Cutting speed: 50 m/min
| Power Consumption | Torque | Thrust |
|---|---|---|
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INTERNAL COOLANT TYPE
- Note:
- When using an internal coolant type drill, small particles of swarf will jam in the oil hole. Always use a filter for the coolant.
