Please pay attention when selecting the required length of the ball screw spindle. Check carefully the technical drawings for the type of spindle you are buying and, based on this, calculate the spindle length. For accurate length calculation, please use the Ball Screw Calculator, in input text box you can write your desired length of ball screw travel and press button for calculating total length including end-machining parts and nut...
For custom size Ballscrew length based on your needs, you can go to this link and select exactly the size you need.
Here is an example of how to calculate the length of the Ball Screw Spindle for the desired length of travel for SFU1605 type this example is more usable when you choose custom size Ballscrews.
Desired travel of the Ball Screw Spindle: 600mm
Manual Calculation steps for SFU 1605 Ball Screw Spindle:
600mm - Desired travel of the Ball Screw Spindle
42mm - L1 length of the SFU1605 Nut
15mm - Machined part for couplings or pulley
39mm - Position for BK,EK or FK support unit (Fixed side)
11mm - Position for BF,EF or FF support unit (Supported side)
707mm - Total length of Ball Screw Spindle
In practice, it is recommended to add length tolerance to the travel needed for homing positions and end switches!
Machined ball-srews are packed in plastic wrap and permanently oiled. Finishing is very precise and is done by grinding to obtain accurate centricity.
SFU1605 - SFU1610 Drawing
L1 (Nut length) for SFU1605 = 42mm Total 107mm (Nut + End-machining offset)
L1 (Nut length) for SFU1610 = 42mm Total 107mm (Nut + End-machining offset)
SFU2005 - SFU2010 Drawing
L1 (Nut length) for SFU2005 = 42mm Total 115mm (Nut + End-machining offset)
L1 (Nut length) for SFU2010 = 52mm Total 125mm (Nut + End-machining offset)
SFU2505 - SFU2510 Drawing
L1 (Nut length) for SFU2505 = 42mm / Total 134mm (Nut + End-machining offset)
L1 (Nut length) for SFU2510 = 85mm / Total 177mm (Nut + End-machining offset)