Quality Comparison Table of Segment Screw & Kneading Disk

Comparison Item

Shanghai Omega

Generic Manufacturer in China

Material

Manufacturing Material for Screw Element & Kneading Disk

Varieties of material can be chosen based on customer's working condition, steel supplier is reliable

Generally made of nitrided steel, mold steel and different kinds of high-speed steel,steel supplier is uneven

Finished Product Hardness

Hardness Controll: HRC58～62

Hardness is not stable because of the quality of materials

Internal spline of a single longer screw element

Spline through full length that element strength is high

there is no spline on the middle of element that strength is low

Size Tolerance  Deviation

Size tolerances of spline ID

≤0.04mm

≤0.20mm

Size tolerances of OD

≤0.025mm

≤0.05mm

Size tolerances of thread ID

≤0.04mm

≤0.10mm

Shape Tolerance Deviation

End surface perpendicular to the axis of

≤0.02mm

≤0.08mm

Coaxiality of internal spline with thread OD

≤0.03mm

≤0.10mm

Main Machining Equipment

Internal Spline Processing Equipment

Horizontal Broaching Machine

Horizontal Broaching Machine

Screw Thread Processing Equipment

CNC Thread Grinding Machine

General Lathe Restructuring