3D Printer CNC Lead Screw 400mm x 8mm with Nut (THSL-400-8D)
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Prices updated: 13 Oct 2026
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About this product
A 400 mm (40 cm) lead screw with an 8 mm diameter and an 8 mm lead, made from 316 stainless steel and supplied with its nut. It is used as the Z-axis drive in many 3D printer and CNC designs, where the lead sets how far the carriage moves per rotation.
Specifications
- Model
- THSL-400-8D
- Length
- 400 mm (40 cm)
- Diameter
- 8 mm
- Lead
- 8 mm
- Pitch
- 2 mm
- Material
- 316 stainless steel
Frequently asked questions
How do I connect it to a stepper motor?
Use a flexible shaft coupler between the motor shaft and the screw end. NEMA 17 motors commonly have a 5 mm shaft, so check your motor's shaft size and choose a coupler that fits both diameters.
What does the 8 mm lead mean for my axis?
Lead is the linear travel for one full turn, so one revolution moves the nut 8 mm. With a 2 mm pitch, the lead is four times the pitch, so use the lead value, not the pitch, when calculating steps per mm.
