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Cutting Tool Screws
A/B type cylindrical-head tool screws, M2.2–M4, pressing the
Cylindrical Head Tool Screws Type A/B | M2.2-M4 Insert Clamping Screws
- Size rangeM2.2-M4
- MaterialSCM435 alloy steel
- FinishBlack oxide, zinc-nickel, DLC coating
- Installationtorqued to the tool maker's value
- StandardGB/T 3098.1, ISO 16047
Product overviewOverview
A cylindrical head presses flat on the insert, so the clamp force travels along the screw axis without the radial component a countersunk head would produce. That makes the joint less sensitive to insert-hole centring and suits compact pockets. A and B types differ in head diameter and height, matching different insert hole series and contact areas.
This page covers M2.2-M4 in SCM435 alloy steel, with black oxide, zinc-nickel, dlc coating as the standard finish.property class 12.9 (tensile strength ≥1200 MPa); installed by torqued to the tool maker's value.
Key featuresFeatures
- Flat cylindrical head applies clamp force along the axis, with no radial component on the insert.
- A and B head sizes match different insert hole series.
- SCM435 quenched and tempered to class 12.9, tensile strength at least 1200 MPa.
- Roller-burnished fillet under the head improves fatigue resistance.
Typical applicationsApplications
- Small indexable insert clamping
- Micro boring bars and profile tools
- Swiss lathe tool stations
Selection notesSelection
A and B types are not interchangeable: the head diameter change alters contact area and can leave marks or under-clamp the insert.
Frequently asked questionsFAQ
How do I specify the Cylindrical Head Tool Screws Type A/B | M2.2-M4 Insert Clamping Screws?
What matters during installation of the Cylindrical Head Tool Screws Type A/B | M2.2-M4 Insert Clamping Screws?
| Size range | M2.2-M4 |
|---|---|
| Head type | Type A cylindrical / Type B cylindrical |
| Material | SCM435 alloy steel |
| Property class | 12.9 (tensile strength ≥1200 MPa) |
| Drive | TORX / hex socket |
| Finish | Black oxide, zinc-nickel, DLC coating |
| Standards | GB/T, ISO |
| Standard | GB/T 3098.1, ISO 16047 |
| Head style | cylindrical head |
| Installation | torqued to the tool maker's value |
Head diameter, height and face squareness are sampled optically.We recommend a pilot assembly at the actual torque and mating part before locking the process parameters for volume.
