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Printing and Publishing Business Directory << Tuner Module << Screw and Barrel for Single-Screw Extruded

Screw and Barrel for Single-Screw Extruded

Screw and Barrel for Single-Screw Extruded
Screw can be selected from ordinary, gradual, pinned, shielded, separated and exhausted types. The compression ratio of screw and barrel can be designed according
to different raw materials and requirements of clients.
Technical specifications:
1) Material: quality 38Cr Mo Al A
2) Hardness after hardening &tempering: HB240-280
3) Nitride hardness: HV850-1000
4) Nitride case depth: 0.45 - 0.7mm
5) Nitride brittleness: less than grade 2
6) Surface roughness: Ra 0.4
7) Screw straightness: 0.015mm
8) Surface chromium-plating's hardness after nitriding: ?900HB
9) Chromium-plating depth: 0.05 - 0.10mm
10) Alloy hardness: HRC50-65
11) Alloy depth: 0.8 - 2.0mm

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