precision advantages

Screw mold processing with CNC grinder

Ensures screw precision with rolled threads, resulting in smooth, burr-free surfaces

Complete product wobble inspection

Ensures product consistency for worry-free use

Screw precision full inspection

Smooth assembly of screw and nut

Standard screw shape of 30-degree trapezoidal screw

Male screw, d: Screw outer diameter, d1: Screw bottom minor diameter, d2: Effective diameter
Female screw
D: Screw bottom diameter, D1: Inner diameter, D2: Effective diameter, P: Pitch, H1: Height of the contact part
* Pitch 3 for D dimension 16, pitch 5 for D dimension 25, pitch 6 for D dimension 40 all follow Tr technology standards.

Trapezoidal(Lead) Screw Precision

Item	Content
Screw Precision	Grade 7e
Nut Precision	Grade 7H
Single Pitch Error	±0.02
Cumulative Pitch Error	±0.15/300mm
Full-Length Runout Tolerance	Refer to the table on the next page

Runout Measurement Method

Trapezoidal Screw Types

Type	Straight bar type	Holder type	Both-end terminal type	One-side step, one-side two-step type

trapezoidal-screw-nut-types

Standard Type			Compact type		Convex type
Circular flange type	Cut flange 2-hole type	Cut flange 4-hole type	Circular flange type	Cut flange 2-hole type	Slider width expansion type

Additional Machining Options for Trapezoidal Screws

Flat Machining
2 Flat Sides
Stop Ring Groove
General Screw Hole
Bearing Male Screw
4 Flat Machining
Keyway