Length
Diameter
Pitch
Material
Finish
Max travel
DELRIN NUT
Thread
Material
Dimensions
Mounting
Hole pitch
Backlash
8 mm
1.25 mm
Stainless steel
Polished
110 - 140 mm (approx )
M8 1.25 mm pitch
Delrin (acetal )
35 mm x 13 mm x 31 mm
2 hole fixing
20 mm
Virtually zero (adjustable)
Description
These lead screw and anti-backlash nut block sets have been designed specifically for the CNC hobbyist in mind, to provide a low cost solution for providing linear motion when coupled with a stepper motor.
This particular item comprises of 3 sets of a 190 mm stainless steel lead screw with a matching anti-backlash delrin nut. The diameter is 8 mm with a standard M8 1.25 mm pitch. This length is suitable for the z-axis of a CNC machine.
This pitch is ideal for small hobby CNC machines, where large speeds are not required, as the fine pitch provides good precision whilst requiring minimal force from a stepper motor, and thus is suitable for direct drive with small stepper motors. Due to the high resolution (0.00625 mm per full step on a standard 1.8 degree motor) vibration is negligible and a simple drive can be used without micro-stepping, thus further reducing cost.
The lead screw is supplied polished and fitted with our anti-backlash delrin nut and has a standard 1.25 mm pitch. There is no machining on the ends but 8 mm bore bearings (such as 608) can easily be fitted to either end with standard 8 mm nuts.
The anti-backlash delrin nut is manufactured from grade A delrin (Acetal homoplymer B) supplied from a reputable European manufacturer. This material is extremely hard wearing, and normally does not require lubrication. A pre-set screw adjustment removes any backlash, and due to its mechanical properties there is minimum friction and wear.
The form of the nut is as a rectangular block with 2 mounting holes, and as such can be directly attached to the moving base, without need for brackets or additional items.
This item is shipped by registered international air mail
