LEAD SCREW
Length
Diameter
Pitch
Material
Finish
DELRIN NUT
Thread
Material
Dimensions
Mounting
Hole pitch
FLANGE BEARING
Bore diameter
Dimensions
Mounting
Hole pitch
Material
Color
8 mm
1.25 mm
Stainless steel
Polished
M8 1.25 mm pitch
Delrin (acetal )
35 x 31 x 13 mm
2 hole fixing
20 mm
8 mm
35 x 35 x 12 mm
4 hole fixing
25 x 25 mm
Composite
White
An assembly consisting of a 295 mm M8 stainless steel lead screw, a delrin anti-backlash nut and 2 compact flange bearings with 4 stainless steel fixing nuts.
The lead screw and 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 a 295 mm stainless steel lead screw with a matching delrin nut. The diameter is 8 mm with a standard M8 1.25 mm pitch.
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 delrin anti-backlash nut which has a standard 1.25 mm pitch. Two flange bearings are supplied which can be easily mounted onto a flat surface of the machine member.
The 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. Due to its mechanical properties there is minimum wear and backlash.
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.
The 2 compact flange bearings provide convenient easy to mount bearings in a housing with a matching 8 mm bore for the lead screw and has an 8 mm bore diameter.The compact size of this bearing is ideal for small CNC machines where space is limited. The housing is made of a sturdy high density composite material and is fitted with an 8 mm bore bearing.
The 2 flange bearings are supplied with 4 stainless steel nuts for fixing to the stainless steel lead screw.
This item is sent by registered international air mail