Lead Screw Specifications for BiSlide® Assemblies
A wide selection of high-quality lead screws provide flexibility in designing the drive portion of Velmex translation stages.
The lead screws we use are all manufactured by us to exacting standards. They are formed by rolling through precision dies rather than cutting on a screw machine, resulting in higher quality and accuracy. The screws are made of 304 stainless steel. Other materials are available for specialized applications. Please check with our Application Engineers for details.
The lead screws are available in a range of diameters with both English and Metric Threads. The pitch for English Thread lead screws range from 2.5 turns per inch to 40 turns per inch. The Metric lead screws range from 5 turns to 10 turns per metric thread. We offer both Standard accuracy and Precision accuracy (Precision grade) screws.
English Thread Lead Screws
| Pitch | Backlash Typical | Resolution | BiSlide® Code | |||
| Turns per inch | Advance per revolution | English | Metric | Degrees | English | |
| 2.5* | 0.400" | 0.002" | 0.051 mm | 1/200 rev or 1.8° | 0.001" | E04 |
| 5* | 0.200" | 0.001" | 0.025 mm | 1/200 rev or 1.8° | 0.0005" | E02 |
| 10 | 0.100" | 0.0005" | 0.013 mm | 1/200 rev or 1.8° | 0.00025 | E01 |
Metric Thread Lead Screws
| Pitch | Backlash Typical | Resolution | BiSlide® Code | |||
| Turns per cm | Advance per revolution | English | Metric | Degrees | Metric | |
| 5 | 2 mm | 0.00039" | 0.01 mm | 1/200 rev or 1.8° | 0.005 mm | M02 |
| 10 | 1 mm | 0.0002" | 0.005 mm | 1/200 rev or 1.8° | 0.0025 mm | M01 |
*Not recommended for vertical assemblies because the lead screw could back drive.
More accurate screws are available. Contact a Velmex Application Engineer for more information.
In manually operated applications backlash can be adjusted to near 0.
Resolution specified with standard Velmex motor configurations with 1.8° step angles using VXC Stepping Motor Controller.
| Repeatability | 0.00015″ (4 microns) typical |
| Straight line accuracy | 0.003″ (0.076 mm) over entire travel distance. Higher accuracy 0.0015″ (0.038mm) available |
| Screw lead accuracy | 0.003″/10″ (0.076 mm/25 cm) 0.0015″/10″ available. Consult factory. |
| Title | Summary | File Type | Link | hf:file_type |
|---|---|---|---|---|
| BiSlide Lead Screw Torque | Chart showing the lead screw torque/load for motorized BiSlides |
