Steam Tempered (Steam Oxide) Surface Treatment
E6541/4
UNF Combi Taps Spiral Flute 30°
Ordering number: 5978407
Combination drill-tap with a 30° spiral flute, for Unified National Fine thread UNF 1/4" with 28 TPI and Medium class of fit, dimensions according to DORMER PRAMET-DIN standard with 6.3mm shank and 5.0mm square drive, HSS with steam tempered surface finish and 30° helix angle for 1.5xD through hole threading in free machining steel
Product Feature
Thread Form, Unified Fine
DIN Dormer Standard
Medium Inch Thread Class of Fit
Through Hole Application
1.5×D Usable Tool Depth to Diameter Ratio
High Speed Steel Tool Material
Semi-Bottoming Tap Chamfer (2 – 3 Pitch Lead)
Spiral Flute Geometry
30° Helix Angle (Flute)
Right Hand Rotation / Cutting
Product Detail
Description | Value |
|---|---|
| EAN number | 7320760339008 |
| EDP number | 0339008 |
| Product name | E6541/4 |
| Ordering code ANSI | E6541/4 |
| Gross weight - grams | 21 |
| Thread diameter size (TDZ) | 1/4 |
| Threads per inch (TPI) | 28 |
| Thread diameter - millimeter (TD) | 5.5 mm |
| Overall length - millimeter (OAL) | 83 mm |
| Threading length - millimeter (THL) | 19 mm |
| Drill Part Length - millimeter (LDP) | 13 mm |
| Connection diameter - millimeter (DCON MS) | 6.3 mm |
| Clamping width - millimeter (WSC) | 5 mm |
| Flute count (NOF) | 2 |
| ANSI | E6541/4 |
| ISO | E6541/4 |
Cutting Conditions
| Suitability | vc | f | |
|---|---|---|---|
| P1.1 - Free machining sulfurized carbon steel with a hardness of < 240HB | Primary use | 59 ft/min | |
| P1.2 - Free machining sulfurized and phosphorized carbon steel with a hardness of < 180HB | Primary use | 66 ft/min | |
| P1.3 - Free machining sulfurized/phosphorized and leaded carbon steel with a hardness of < 180HB | Primary use | 72 ft/min |
| Suitability | vc | f | |
|---|---|---|---|
| P2.1 - Plain low carbon steel containing < 0.25%C with a hardness of < 180HB | Primary use | 66 ft/min | |
| P2.2 - Plain medium carbon steel containing < 0.55%C with a hardness of < 240HB | Possible use | 59 ft/min |
| Suitability | vc | f | |
|---|---|---|---|
| P3.1 - Alloy steel with a hardness of < 180HB | Possible use | 49 ft/min | |
| P3.2 - Alloy steel with a hardness of 180 - 260HB | Possible use | 39 ft/min |
| Suitability | vc | f | |
|---|---|---|---|
| N1.2 - Wrought aluminium alloys with a hardness of 60 - 100HB | Possible use | 46 ft/min | |
| N1.3 - Wrought aluminium alloys with a hardness of 100 - 150HB | Possible use | 30 ft/min |
| Suitability | vc | f | |
|---|---|---|---|
| N3.1 - Free-cutting copper-alloys materials with excellent machining properties | Possible use | 66 ft/min | |
| N3.2 - Short-chip copper-alloys with good to moderate machining properties | Possible use | 49 ft/min |
| Suitability | vc | f | |
|---|---|---|---|
| N4.1 - Thermoplastic polymers | Possible use | 82 ft/min |