SURZ (Metric Threads) | SU Roll Taps | YAMAWA
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SURZ (Metric Threads)
Product Features
- Adopting the special form on tap's root, SURZ controls the minor diameter geometry of internal threads.
- Special lobe shape realizes low tapping torque.
- High efficiency can be obtained in thread forming of stainless steel parts.
- By adjusting bored hole size, you can adjust the minor diameter geometry of internal threads.
Tapping Data
Tapping condition [ M2×0.4 ]
| Workpiece Material | SUS304 |  |
| Bored Hole Size | φ1.82,φ1.83,φ1.84 | |
| Tapping Length | 4mm（Blind hole) | |
| Tapping Speed | 3m/min | |
| Feed | Rigid | |
| Machine | Vertical Machining center | |
| Tapping Direction | Vertical | |
| Tapping Fluid | Water soluble cutting fluid |
| M2×0.4 6H Internal Thread Minor Diameter and Tolerance |
|
| Max. | 1.679 |
| Min. | 1.567 |
| Tolerance | 0.112 |
Recommended bored hole diameter before tapping
Unit : mm
| Size | Class | Recommended Bored Hole Size |
| M1 × 0.25 | G4 | 0.90 |
| M1.2 × 0.25 | G4 | 1.10 |
| M1.4 × 0.3 | G4 | 1.28 |
| M1.6 × 0.2 | G3 | 1.52 |
| M1.6 × 0.35 | G4 | 1.46 |
| M1.7 × 0.35 | G4 | 1.56 |
| M2 × 0.4 | G4 | 1.82 |
| M2.3 × 0.4 | G4 | 2.12 |
| M2.5 × 0.45 | G4 | 2.30 |
| M2.6 × 0.45 | G4 | 2.40 |
| M3 × 0.5 | G5 | 2.77 |
| No.2-56UNC | G5 | 1.98 |
| No.4-40UNC | G5 | 2.55 |
| No.6-32UNC | G5 | 3.14 |
※ Recommended bored hole diameters shown in above table have been calculated by aiming at the thread engagement of 90% and
by considering avoidance of tap breakage, based on our past tapping test experiences.
※ Recommended bore hole diameter may change because material deformation can slightly change depending on material,
hardness, dimension of workpiece and tapping condition.
Specification
Tapping Speeds depending
Recommended class
Segment：1J
|
Size |
Class |
Code |
Chamfer |
L (mm) |
ℓ (mm) |
ℓn (mm) |
ℓs (mm) |
Ds (mm) |
K (mm) |
ℓk (mm) |
Lobe |
TYPE |
|
For Metric Threads |
||||||||||||
|
M1×0.25 |
G4 |
SURZ41.0BB |
2P |
36 |
4.5 |
- |
24 |
3 |
2.5 |
5 |
4 |
1 |
|
M1.2×0.25 |
G4 |
SURZ41.2BB |
2P |
36 |
4.5 |
- |
24 |
3 |
2.5 |
5 |
4 |
1 |
|
M1.4×0.3 |
G4 |
SURZ41.4CB |
2P |
36 |
5.4 |
- |
24 |
3 |
2.5 |
5 |
4 |
1 |
|
M1.6×0.35 |
G4 |
SURZ41.6DB |
2P |
36 |
6.3 |
- |
24 |
3 |
2.5 |
5 |
4 |
2 |
|
M1.6×0.2 |
G3 |
SURZ31.6AB |
2P |
36 |
3.6 |
- |
24 |
3 |
2.5 |
5 |
4 |
2 |
|
M1.7×0.35 |
G4 |
SURZ41.7DB |
2P |
36 |
6.3 |
- |
24 |
3 |
2.5 |
5 |
4 |
2 |
|
M2×0.4 |
G4 |
SURZ42.0EB |
2P |
42 |
7.2 |
- |
27 |
3 |
2.5 |
5 |
4 |
3 |
|
M2.3×0.4 |
G4 |
SURZ42.3EB |
2P |
42 |
7.2 |
- |
27 |
3 |
2.5 |
5 |
4 |
3 |
|
M2.5×0.45 |
G4 |
SURZ42.5FB |
2P |
46 |
8.1 |
14 |
29 |
3 |
2.5 |
5 |
4 |
4 |
|
M2.6×0.45 |
G5 |
SURZ52.6FB |
2P |
46 |
8.1 |
14 |
29 |
3 |
2.5 |
5 |
4 |
4 |
|
M3×0.5 |
G5 |
SURZ53.0GB |
2P |
46 |
9 |
14 |
26 |
4 |
3.2 |
6 |
4 |
4 |
Number of oil grooves : Metric thread: M2.6 and smaller = non, M3 = 2
Unified thread: No.4 and smaller = non, No.6 = 2
| แบรนด์สินค้า | YAMAWA |
|---|
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