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Technical Information UniSlide®

Lead Screw Specifications for UniSlide® 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.

Rapid Advance Models do not use standard lead screws.  These assemblies use a clamping style drive; turns per inch is not applicable.

Repeatability0.00015″ (4 microns) typical
Straight line accuracy0.003″ (0.076 mm) over entire travel distance. Higher accuracy 0.0015″ (0.038mm) available
Screw lead accuracy0.003″/10″ (0.076 mm/25 cm) 0.0015″/10″ available. Consult factory.

Manual UniSlide® Assemblies

English Thread Lead Screws

PitchBacklash TypicalUniSlide™ Code
Turns per inchAdvance per revolutionEnglishMetricDegreesStandard AccuracyWith Scale and Vernier - Standard AccuracyWith Graduated Knob - Precision AccuracyDivision on Graduated KnobLead Screw Diameter
400.025"0.00013"0.003 mm1/200 rev or 1.8°CCEP40251/4"
200.05"0.00025"0.006 mm1/200 rev or 1.8°BBEP20501/4"

Metric Thread Lead Screws

PitchBacklash TypicalUniSlide® Code
Turns per cmAdvance per revolutionEnglishMetricDegreesStandard AccuracyWith Scale and Vernier - Standard AccuracyWith Graduated Knob - Precision AccuracyDivision on Graduated KnobLead Screw Diameter
101 mm0.0002"0.005 mm1/200 rev or 1.8°K1K1MQ11007 mm
52 mm0.00039"0.01 mm1/200 rev or 1.8°K2K2MQ22007 mm
Repeatability0.00015″ (4 microns) typical
Straight line accuracy0.003″ (0.076 mm) over entire travel distance. Higher accuracy 0.0015″ (0.038mm) available
Screw lead accuracy0.003″/10″ (0.076 mm/25 cm) 0.0015″/10″ available. Consult factory.

Lead Screws for Rapid Advance Models

English

PitchBacklash Typical
Turns per inchAdvance per revolutionEnglishMetricDegreesFine Adjust - Limited TravelFine Adjust with Scale and Vernier - Limited TravelFine Adjust with Micrometer - Limited TravelFine Adjust with Scale and VernierLead Screw Diameter
200.05"0.00025"0.006 mm1/200 rev or 1.8°DDEGE-1/4"

Metric

PitchBacklash Typical
Turns per cmAdvance per revolutionEnglishMetricDegreesFine Adjust - Limited TravelFine Adjust with Scale and Vernier - Limited TravelFine Adjust with Micrometer - Limited TravelFine Adjust with Scale and VernierLead Screw Diameter
101 mm0.0002"0.005 mm1/200 rev or 1.8°-DMGM-7 mm
Repeatability0.00015″ (4 microns) typical
Straight line accuracy0.003″ (0.076 mm) over entire travel distance. Higher accuracy 0.0015″ (0.038mm) available
Screw lead accuracy0.003″/10″ (0.076 mm/25 cm) 0.0015″/10″ available. Consult factory.

English Thread Lead Screws

PitchBacklash TypicalUniSlide™ Code
Turns per inchAdvance per revolutionEnglishMetricDegreesStandard AccuracyWith Scale and Vernier - Standard AccuracyWith Graduated Knob - Precision AccuracyDivision on Graduated KnobLead Screw Diameter
400.025"0.00013"0.003 mm1/200 rev or 1.8°CCEP40251/4"
200.05"0.00025"0.006 mm1/200 rev or 1.8°BBEP20501/4"
100.1"0.0005"0.013 mm1/200 rev or 1.8°W1W1EP101003/8"
50.2"0.001"0.025 mm1/200 rev or 1.8°W2W2EP52003/8"
2.50.4"0.002"0.051 mm1/200 rev or 1.8°W4---3/8"

Metric Thread Lead Screws

PitchBacklash TypicalUniSlide® Code
Turns per cmAdvance per revolutionEnglishMetricDegreesStandard AccuracyWith Scale and Vernier - Standard AccuracyWith Graduated Knob - Precision AccuracyDivision on Graduated KnobLead Screw Diameter
101 mm0.0002"0.005 mm1/200 rev or 1.8°K1K1MQ11007 mm
52 mm0.00039"0.01 mm1/200 rev or 1.8°K2K2MQ22007 mm

*Adjustable nut models (A25,A40,A60) can have backlash adjusted to near 0. Manual applications only

Rapid Advance Models

English Thread Lead Screws

PitchBacklash Typical
Turns per inchAdvance per revolutionEnglishMetricDegreesFine AdjustFine Adjust with Scale and Vernier - Limited TravelFine Adjust with Micrometer - Limited TravelFine Adjust with Scale and VernierLead Screw Diameter
200.05"0.00025"0.006 mm1/200 rev or 1.8°D (Limited Travel) / H20 (Full Travel)DEGEHE1/4"

Metric Thread Lead Screws

PitchBacklash Typical
Turns per cmAdvance per revolutionEnglishMetricDegreesFine Adjust - Full TravelFine Adjust with Scale and Vernier - Limited TravelFine Adjust with Micrometer - Limited TravelFine Adjust with Scale and Vernier - Full TravelLead Screw Diameter
101 mm0.0002"0.005 mm1/200 rev or 1.8°H1DMGMHM7 mm

*Adjustable nut models (A25,A40,A60) can have backlash adjusted to near 0. Manual applications only

English Thread Lead Screws

PitchBacklash TypicalUniSlide™ Code
Turns per inchAdvance per revolutionEnglishMetricDegreesStandard AccuracyWith Scale and Vernier - Standard AccuracyWith Graduated Knob - Precision AccuracyDivision on Graduated KnobLead Screw Diameter
400.025"0.00013"0.003 mm1/200 rev or 1.8°CCEP40253/8"
200.05"0.00025"0.006 mm1/200 rev or 1.8°BBEP20503/8"
100.1"0.0005"0.013 mm1/200 rev or 1.8°W1W1EP101003/8"
50.2"0.001"0.025 mm1/200 rev or 1.8°W2W2EP52003/8"
2.50.4"0.002"0.051 mm1/200 rev or 1.8°W4---3/8"

Metric Thread Lead Screws

PitchBacklash TypicalUniSlide® Code
Turns per cmAdvance per revolutionEnglishMetricDegreesStandard AccuracyWith Scale and Vernier - Standard AccuracyWith Graduated Knob - Precision AccuracyDivision on Graduated KnobLead Screw Diameter
101 mm0.0002"0.005 mm1/200 rev or 1.8°K1K1MQ110010 mm
52 mm0.00039"0.01 mm1/200 rev or 1.8°K2K2MQ220010 mm

*Adjustable nut models (A25,A40,A60) can have backlash adjusted to near 0. Manual applications only

Rapid Advance Models

English Thread Lead Screws

PitchBacklash Typical
Turns per inchAdvance per revolutionEnglishMetricDegreesFine AdjustFine Adjust with Scale and Vernier - Limited TravelFine Adjust with Micrometer - Limited TravelFine Adjust with Scale and VernierLead Screw Diameter
200.05"0.00025"0.006 mm1/200 rev or 1.8°D (Limited Travel) / H20 (Full Travel)DEGEHE3/8"

Metric Thread Lead Screws

PitchBacklash Typical
Turns per cmAdvance per revolutionEnglishMetricDegreesFine Adjust - Full TravelFine Adjust with Scale and Vernier - Limited TravelFine Adjust with Micrometer - Limited TravelFine Adjust with Scale and Vernier - Full TravelLead Screw Diameter
101 mm0.0002"0.005 mm1/200 rev or 1.8°H1DMGMHM10 mm

*Adjustable nut models (A25,A40,A60) can have backlash adjusted to near 0. Manual applications only

English Thread Lead Screws

PitchBacklash TypicalUniSlide™ Code
Turns per inchAdvance per revolutionEnglishMetricDegreesStandard AccuracyWith Scale and Vernier - Standard AccuracyWith Graduated Knob - Precision AccuracyDivision on Graduated KnobLead Screw Diameter
400.025"0.00013"0.003 mm1/200 rev or 1.8°CCEP40251/2"
200.05"0.00025"0.006 mm1/200 rev or 1.8°BBEP20501/2"
100.1"0.0005"0.013 mm1/200 rev or 1.8°W1W1EP101001/2"
50.2"0.001"0.025 mm1/200 rev or 1.8°W2W2EP52001/2"
2.50.4"0.002"0.051 mm1/200 rev or 1.8°W4---1/2"

Metric Thread Lead Screws

PitchBacklash TypicalUniSlide® Code
Turns per cmAdvance per revolutionEnglishMetricDegreesStandard AccuracyWith Scale and Vernier - Standard AccuracyWith Graduated Knob - Precision AccuracyDivision on Graduated KnobLead Screw Diameter
101 mm0.0002"0.005 mm1/200 rev or 1.8°K1K1MQ110014 mm
52 mm0.00039"0.01 mm1/200 rev or 1.8°K2K2MQ220014 mm

*Adjustable nut models (A25,A40,A60) can have backlash adjusted to near 0. Manual applications only

Rapid Advance Models

English Thread Lead Screws

PitchBacklash Typical
Turns per inchAdvance per revolutionEnglishMetricDegreesFine Adjust - Full TravelFine Adjust with Scale and Vernier - Limited TravelFine Adjust with Micrometer - Limited TravelFine Adjust with Scale and VernierLead Screw Diameter
200.05"0.00025"0.006 mm1/200 rev or 1.8°H20--HE1/2"

Metric Thread Lead Screws

PitchBacklash Typical
Turns per cmAdvance per revolutionEnglishMetricDegreesFine Adjust - Full TravelFine Adjust with Scale and Vernier - Limited TravelFine Adjust with Micrometer - Limited TravelFine Adjust with Scale and Vernier - Full TravelLead Screw Diameter
101 mm0.0002"0.005 mm1/200 rev or 1.8°H1--HM14 mm

*Adjustable nut models (A25,A40,A60) can have backlash adjusted to near 0. Manual applications only

English Thread Lead Screws

PitchBacklash TypicalUniSlide™ Code
Turns per inchAdvance per revolutionEnglishMetricDegreesStandard AccuracyWith Scale and Vernier - Standard AccuracyWith Graduated Knob - Precision AccuracyDivision on Graduated KnobLead Screw Diameter
400.025"0.00013"0.003 mm1/200 rev or 1.8°C-P40251/2"
200.05"0.00025"0.006 mm1/200 rev or 1.8°B-P20501/2"
100.1"0.0005"0.013 mm1/200 rev or 1.8°W1-P101001/2"
50.2"0.001"0.025 mm1/200 rev or 1.8°W2-P52001/2"
2.50.4"0.002"0.051 mm1/200 rev or 1.8°W4---1/2"

Metric Thread Lead Screws

PitchBacklash TypicalUniSlide® Code
Turns per cmAdvance per revolutionEnglishMetricDegreesStandard AccuracyWith Scale and Vernier - Standard AccuracyWith Graduated Knob - Precision AccuracyDivision on Graduated KnobLead Screw Diameter
101 mm0.0002"0.005 mm1/200 rev or 1.8°K1-Q110014 mm
52 mm0.00039"0.01 mm1/200 rev or 1.8°K2-Q220014 mm

Motorized UniSlide® Assemblies

English Thread Lead Screws

PitchBacklash TypicalResolution
Turns per inchAdvance per revolutionEnglishMetricDegreesStandard AccuracyPrecision AccuracyEnglishEfficiencyLead Screw Diameter
400.025"0.00013"0.003 mm1/200 rev or 1.8°CP400.0000625"0.141/4"
200.05"0.00025"0.006 mm1/200 rev or 1.8°BP200.000125"0.261/4"

Metric Thread Lead Screws

PitchBacklash TypicalResolution
Turns per cmAdvance per revolutionEnglishMetricDegreesStandard AccuracyPrecision AccuracyMetricEfficiencyLead Screw Diameter
101 mm0.0002"0.005 mm1/200 rev or 1.8°K1Q10.0025 mm0.157 mm
52 mm0.00039"0.01 mm1/200 rev or 1.8°K2Q20.005 mm0.337 mm

Resolution specified with standard Velmex motor configurations with 1.8° step angles using VXC Stepping Motor Controller.

English Thread Lead Screws

PitchBacklash TypicalResolution
Turns per inchAdvance per revolutionEnglishMetricDegreesStandard AccuracyPrecision AccuracyEnglishEfficiencyLead Screw Diameter
400.025"0.00013"0.003 mm1/200 rev or 1.8°CP400.0000625"0.143/8"
200.05"0.00025"0.006 mm1/200 rev or 1.8°BP200.000125"0.263/8"
100.1"0.0005"0.013 mm1/200 rev or 1.8°W1P100.00025"0.463/8"
50.2"0.001"0.025 mm1/200 rev or 1.8°W2P50.0005"0.643/8"
2.50.4"0.002"0.051 mm1/200 rev or 1.8°W4P2.50.001"0.733/8"

Metric Thread Lead Screws

PitchBacklash TypicalResolution
Turns per cmAdvance per revolutionEnglishMetricDegreesStandard AccuracyPrecision AccuracyMetricEfficiencyLead Screw Diameter
101 mm0.0002"0.005 mm1/200 rev or 1.8°K1Q10.0025 mm0.1510 mm
52 mm0.00039"0.01 mm1/200 rev or 1.8°K2Q20.005 mm0.3310 mm

Resolution specified with standard Velmex motor configurations with 1.8° step angles using VXC Stepping Motor Controller.

English Thread Lead Screws

PitchBacklash TypicalResolution
Turns per inchAdvance per revolutionEnglishMetricDegreesStandard AccuracyPrecision AccuracyEnglishEfficiencyLead Screw Diameter
400.025"0.00013"0.003 mm1/200 rev or 1.8°CP400.0000625"0.143/8"
200.05"0.00025"0.006 mm1/200 rev or 1.8°BP200.000125"0.263/8"
100.1"0.0005"0.013 mm1/200 rev or 1.8°W1P100.00025"0.463/8"
50.2"0.001"0.025 mm1/200 rev or 1.8°W2P50.0005"0.643/8"
2.50.4"0.002"0.051 mm1/200 rev or 1.8°W4P2.50.001"0.733/8"

Metric Thread Lead Screws

PitchBacklash TypicalResolution
Turns per cmAdvance per revolutionEnglishMetricDegreesStandard AccuracyPrecision AccuracyMetricEfficiencyLead Screw Diameter
101 mm0.0002"0.005 mm1/200 rev or 1.8°K1Q10.0025 mm0.1510 mm
52 mm0.00039"0.01 mm1/200 rev or 1.8°K2Q20.005 mm0.3310 mm

Resolution specified with standard Velmex motor configurations with 1.8° step angles using VXC Stepping Motor Controller.

English Thread Lead Screws

PitchBacklash TypicalResolution
Turns per inchAdvance per revolutionEnglishMetricDegreesStandard AccuracyPrecision AccuracyEnglishEfficiencyLead Screw Diameter
400.025"0.00013"0.003 mm1/200 rev or 1.8°CP400.0000625"0.141/2"
200.05"0.00025"0.006 mm1/200 rev or 1.8°BP200.000125"0.261/2"
100.1"0.0005"0.013 mm1/200 rev or 1.8°W1P100.00025"0461/2"
50.2"0.001"0.025 mm1/200 rev or 1.8°W2P50.0005"0.641/2"
2.50.4"0.002"0.051 mm1/200 rev or 1.8°W4P2.50.001"0.731/2"

Metric Thread Lead Screws

PitchBacklash TypicalResolution
Turns per cmAdvance per revolutionEnglishMetricDegreesStandard AccuracyPrecision AccuracyMetricEfficiencyLead Screw Diameter
101 mm0.0002"0.005 mm1/200 rev or 1.8°K1Q10.0025 mm0.1514 mm
52 mm0.00039"0.01 mm1/200 rev or 1.8°K2Q20.005 mm0.3314 mm

Resolution specified with standard Velmex motor configurations with 1.8° step angles using VXC Stepping Motor Controller.

English Thread Lead Screws

PitchBacklash Typical
Turns per inchAdvance per revolutionEnglishMetricDegreesStandard AccuracyPrecision AccuracyEfficiencyLead Screw Diameter
400.025"0.00013"0.003 mm1/200 rev or 1.8°CP400.141/2"
200.05"0.00025"0.006 mm1/200 rev or 1.8°BP200.261/2"
100.1"0.0005"0.013 mm1/200 rev or 1.8°W1P100.461/2"
50.2"0.001"0.025 mm1/200 rev or 1.8°W2P50.641/2"
2.50.4"0.002"0.051 mm1/200 rev or 1.8°W4P2.50.731/2"

Metric Thread Lead Screws

PitchBacklash Typical
Turns per cmAdvance per revolutionEnglishMetricDegreesStandard AccuracyPrecision AccuracyEfficiencyLead Screw Diameter
101 mm0.0002"0.005 mm1/200 rev or 1.8°K1Q10.1514 mm
52 mm0.00039"0.01 mm1/200 rev or 1.8°K2Q20.3314 mm
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