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A25 with Knob A25 Rapid Advance XY A25 A25 Graduated Knob A25 Free Slide


UniSlide® A25 Series



The A25 Series UniSlide stage has a body width of 2.5 inches, slider length of 2.5 inches and can carry a 30 lbs. horizontal load. The A25 can travel up to 24.5" with the 2.5" slider/carriage.

A25 Series UniSlides are comprised of an aluminum alloy extruded dovetail base with 60 degree opposing V-type ways. An aluminum alloy carriage that runs in the dovetail ways of the base. A25 lead screws are constrained and supported with pre-loaded Delrin® thrust bearings, which have pre-loaded ball bearings. The lead screw drive nut is a tension adjustable nut made of Delrin providing low friction, and minimal backlash.

The A25 Series UniSlide is available in 10 models/styles. Seven lead screw pitches are available along with rapid advance configurations.


Linear UniSlide Assembly Style/Model Options

The UniSlide Series and the styles below combine to create a complete UniSlide Assembly model. Additional options and accessories can be added (See Options/Accessories). Standard style/model options for UniSlide A25 Series Assemblies include:

Free Sliding A25  UniSlide

Free Sliding Model – The simplest UniSlide Assembly where the slider is moved by hand. This features a linear dovetail bearing for smooth motion.

Screw Drive UniSlide

Screw Drive Models – Slide movement is controlled by a lead screw. There are a variety of different diameter lead screws available from 1/4" to 3/8" and 7 mm to 14 mm. Each have different advance ratings.

 UniSlide A25 with Graduate Knob

Graduated Knob Models – The position of the payload is measured by combining the readings from the linear scale and engraved knob or drum dial. Measures position from 0.0001" or 0.01 mm.

 UniSlide A25 with Scale and Vernier

Scale and Vernier Screw Drive Models – Includes a precision English or Metric scale on the base and offset vernier on the slider. Measures position from 0.001" or 0.05 mm.

Rapid Advance Models – Are for quickly repositioning the slider by uncoupling the drive system. This saves time when the slider will be moved frequently or when the base length is long. Each have varying lengths of fine adjustment. The limited fine adjust models use a clamping-like drive. The unlimited fine adjust models use a lead screw and pinion design. Rapid Advance models are not recommended for vertical (Z axis) mounting.

Rapid Advance A25 UniSlide limited adjust

Rapid Advance with Limited Fine Adjust – Have 1/2" of fine pitch adjustment control.

Rapid Advance UniSlide limited adjust and scale and vernier

Rapid Advance with Limited Fine Adjust with Scale and Vernier – The limited fine adjust is also available with an English or Metric scale and vernier.

Rapid Advance A25 UniSlide unlimited adjust

Rapid Advance with Unlimited Fine Adjust – Can be finely adjusted along the full length of the travel. Load is limited to 50 pounds horizontal or 2 pounds vertical. Configuration available on A25, A40 and A60 Series.

Rapid Advance UniSlide unlimited adjust and scale and vernier

Rapid Advance with Unlimited Fine Adjust with Scale and Vernier – The unlimited fine adjust is also available with an English or Metric scale and vernier.

Rapid Advance UniSlide with Micrometer

Rapid Advance with Micrometer Head – The limited fine adjustment is made with a micrometer calibrated to 0.001" or 0.01 mm. Configuration available on A15, A25 and A40 Series.

Left-Right A15  UniSlide Assembly

Left-Right Screw Drive Models – Use two carriages (sliders) and have a common lead screw machined with a left thread on one half and a right thread on the other half. The slides simultaneously move toward or away from each other. Use for applications where two objects must share a common axis of movement. Dual Screw models also available with two screws contolled independently with two knobs.

 

There is a motorized version of the A25 Series UniSlide - MA25 Series. Other configurations and sizes are available on the other Series UniSlide Assemblies - A15, A40, A60, B90.


UniSlide Configurations

The basic linear UniSlide is a 1-axis stage. UniSlides can be combined for multiple axes in a wide range of lengths and payload capacities. See Examples for images of various multi-axis UniSlides and combinations that include other Velmex stages.

UniSlide Configurations

UniSlide® Specifications – Manually-Operated Assemblies

Factors such as size of the motor, size of the payload, travel distance, mounting direction/plane, etc. effect the actual capability of any assembly. Please contact Velmex Application Engineers to configure a system that will meet your exact requirements.

A15 UniSlide UniSlide® A25 Series
Travel Distance‡ 1.5" - 24.5" 3.81 – 62.23 cm
Base Length 3" - 27" 7.62 – 68.58 cm
Slider Length 2.5" 6.35 cm
Weight 1 – 3.68 lbs. 0.45 – 1.67 kg.
Height† 0.81" 2.06 cm
Width 2.5" 6.35 cm
 
Maximum Horizontal Load 30 lbs. 13.6 kg.
Horizontal Central Load 30 lbs. 13.6 kg.
Cantilevered Load 40 lb-in 4.52 N-m
Vertical Central 10 lbs.** 4.5 kg.**
Load Normal (LN)* 10 lbs. 4.5 kg.
Load Thrust (LT)* 3 lbs. 1.36 kg.
Cantilever Side (LCS)* 10 lb-in 1.13 N-m
Cantilever Inline (LCI)* 20 lb-in 2.26 N-m

* Normal Operating Loads are less than the maximum.
** For A25 models with 1/4" or 7 mm diameter lead screws: 10 lb or 4.5 kg 
** For A25 models with 3/8" or 10 mm diameter lead screws: 30 lb or 15.5 kg
† Deeper "B" base configurations available.
‡ Standard travel distances available are in 3" increments.


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.
Operating temperature 0 to 180° F (-18 to 82° C)
Properties of Velmex Stages Information on stage composition, tolerances, wear and design for specialty applications.


Lead Screws Available for A25 Series

A25 Series Lead Screws


Basic Dimensions for A25 Series UniSlide Assemblies

A25 Dimensions


Standard Knobs for A25 Series UniSlide Assemblies

A25 Standard Knobs

Options/Accessories

An array of options and accessories is available for the A25 Series UniSlide Assemblies

Adapter Plates

XY Plates – allow two UniSlides to be converted into an XY motion system. For more specifics and to see the adapter plates in use on a Velmex stage visit the UniSlide Adapters page.

A2500XY Adapter Plate

A2500XY Adapter Plate – To mount an A25 Series UniSlide to another A25 Series or to an A15 Series in XY. (The A25 would be the base stage.)

A4000XY Adapter Plate A4000XY Adapter Plate – To mount an A40 Series UniSlide to another A40 Series or to an A25 Series in XY. (The A40 would be the base stage.)

XZ Plates – Allow UniSlide assemblies to be positioned vertically facing in any of four directions. For more specifics and to see the adapter plates in use on a Velmex stage visit the UniSlide Adapters page.

A2500XZ Adapter Plate

A2500XZ Adapter Plate – To mount an A25 Series UniSlide to another A25 Series (or to an A15 in XZ. (The A25 would be the base horizontal stage.)

A4000XZ Adapter Plate

A4000XZ Adapter Plate – To mount an A40 Series UniSlide or an A25 Series vertically to another A40 Series in XZ. (The A40 would be the base horizontal stage.)

XZ Brackets – allow UniSlide assemblies to be positioned vertically, facing in any of four directions and perpendicular to the X or Y plane. For more specifics and to see the brackets in use on a Velmex stage visit the UniSlide Adapters page.

XZ Adapter Brackets - A25 Series

A2501XZ Adapter Bracket – To mount an A25 Series UniSlide to another A25 Series (6"- 9") or to an A15 Series (6"- 9") in XZ. (The A25 would be the base horizontal stage. The other stage would be mounted vertically.)
B2503XZ Adapter Bracket –To mount an A25 Series UniSlide to another A25 Series (over 9") or to an A15 Series (over 9") in XZ. (The A25 would be the base horizontal stage.)

XZ Adapter Brackets - A40 Series A4001XZ Adapter Bracket – To mount an A40 Series UniSlide (6"- 9") or an A25 Series (6"- 9") vertically to another A40 Series in XZ. (The A40 would be the upper horizontal stage.) Can also mount two B4800TS Rotary Tables at right angles.
B4003XZ Adapter Bracket – To mount an A40 Series UniSlide to another A40 Series (12"- 15") or to an A25 Series (12"- 15") in XZ. (The A40 would be the base horizontal stage.)
B4004XZ Adapter Bracket – To mount an A40 Series UniSlide to another A40 Series (over 15") or to an A25 Series (over 15") in XZ. (The A40 would be the base horizontal stage.)
B5990TXZ Rotary Adapter Plate

Rotary Table Adapter Plates –To mount Velmex Rotary Tables to UniSlide Assemblies either in horizontal or vertical positions.

 

B5990TXZ-BK Adapter Plate – To mount two B5990TS Rotary Tables at right angles to each other or to mount a B5990TS to any A Series UniSlide.

Platform Shelves

Platform Shelf – A right angled bracket designed to be used with UniSlide® Elevating Tables. However, they also can be used with vertically mounted UniSlide Assemblies to support a payload. The shelf can be inverted depending on the motion required.

For more specifics and to see the shelf in use on a Velmex stage visit the UniSlide Adapters page.

UniSlides with two different size sliders

Slider Lengths – Varying length carriages (sliders) can be added to all models of UniSlide Assemblies. Choosing a longer slider reduces the standard travel distance. 2.5" is the standard slider on the A25 Series. Optional lengths available for the A25 are 3" or 4".

Variety of Knobs for UniSlides

Alternative Knobs – A variety of knob styles can be substitute for the standard knob available on the particular style/model of UniSlide Assembly.

 

• Small diameter (5/8") Rogan knob for some A15, A25, A40 Models and Turntables
• Knobs with cranks including:
    – Plain knob (1 3/4" diameter)
    – Drum dial
    – Engraved knob 1 3/4" diameter)
• Reduced diameter graduated knobs for A15, A25 and A40 Graduate Knob models

A25 Series Standard Knobs Available
Click to Open

A25 Standard Knobs

 

Locks – There are a number ways to lock the carriage (slider) position on UniSlides. They include:

Thumb lock on lead screw

Thumbscrew-on-Lead-Screw Lock (-TL) – An easy method to fix the slider utilizing a simple thumbscrew. The thumbscrew lock increases the overall length of the UniSlide base. This lock type is not available on Rapid Advance models.

Travelling Slider Lock

Traveling Slider Lock (-TSL) – This lock attaches to the slider to lock the carriage in place. Available on Free Sliding, Screw Motion and Graduated Knob models only.

Slider Lock

Slider Lock (-SLR or -SLL) – This lock is mounted at the mid-point on the base and is tightened to prevent slider movement. This is only available on slides where the carriage (slide) length is greater than one-half the base length. It can be mounted on the right (-SLR) or left (-SLL) of the base.

Revolution Counter

Revolution Counter (-RC) – A mechanical revolution counter provides a convenient 1/10 revolution increment count. Readouts in either 0.01" or 0.1 mm. Counts precisely with 0.100" or 1 mm lead screws. Other screws require additional calculations. For details see UniSlide Counter page.

Left Right Screw Motion

Left-Right Screw Motion (-LR) – This configuration is very useful for applications where two objects must share a common axis of movement. This assembly incorporates two carriages driven by a single right- and left-hand threaded lead screw. When the knob is turned, the carriages simultaneously move toward or away from each other.

Independent Left-Right Slider UniSlide

Two Independent Carriages (-DS) – a variation on the left-right screw motion UniSlide is one containing two lead screws with control knobs at both ends of the assembly. Each lead screw and carriage operates independently.

Right angle gear box on UniSlide

Right Angle Gearbox – Allows the control knob or wheel to be offset perpendicular to the UniSlide ways. Ideal for tight spaces or applications where access to the end of the stage is limited. Available on A25, A40, A60 and B90 Series.

For more specifics on the gearbox visit the UniSlide Adapters page.

Way covers on UniSlides

Way Covers (-WC) – Protect the slider and dovetail base from dust, dirt and grit that could hamper the efficient operation of the slide. Way covers increase slider height and reduce the travel length of linear UniSlide stages. Not available on Series A15 Assemblies. Available on free sliding, screw drive and graduated knob models of the other assemblies.

Way covers on UniSlides

Wrench - Retainer Nut – Velmex has a custom-designed wrench to easily adjust and remove the threaded retainer nut on UniSlides. When needed, this makes removing and changing the lead screw simple and easy. The wrench is designed for the smaller diameter lead screws (1/4" or 7 mm - A15 Series and some A25) with the split Delrin® thrust bearings and the threaded retainer nut. Note: larger diameter lead screws (3/8", 1/2", 10 mm and 14 mm) use steel bearings and a snap ring retainer.

Black Anodized XY A25 UniSlides

Finishes – Standard UniSlide Assemblies have a brushed aluminum finish. Optional finishes are available at an additional charge and include:

 

• Black Anodizing, additional colors also available. (pictured)
• Hard Coat Anodized and dyed black
• Electroless Nickel Plated
• Specialized coatings for specific applications such as food processing or medical applications
• Modifications for use in a vacuum environment

VRO with an UniSlide Assembly

Encoders and VRO™ Encoder Readout For a high resolution position readout an encoder and Velmex's VRO encoder readout can be mounted to most linear UniSlide assemblies. An encoder, mounted directly to the slider gives a true and accurate reading eliminating lead screw and backlash errors. (Not available on all UniSlide models. A25 Series Rotary Encoder only available with a 3/8" lead screw.)

SEE: Velmex Controls on the Encoders and the VRO Readout for additional details.

 

 


For .STP files, you may need to right click on the download button and save the "target" or "link".


Free Slides
Series Type File Name Description Download View
A25 STP A2504A-S2.5.stp Free Slide, 1.5" Travel Download Button -
A25 STP A2506A-S2.5.stp Free Slide, 3.5" Travel Download Button -
A25 STP A2509A-S2.5.stp Free Slide, 6.5" Travel Download Button -
A25 STP A2512A-S2.5.stp Free Slide, 9.5" Travel Download Button -
A25 STP A2515A-S2.5.stp Free Slide, 12.5" Travel Download Button -
A25 STP A2518A-S2.5.stp Free Slide, 15.5" Travel Download Button -
A25 STP A2521A-S2.5.stp Free Slide, 18.5" Travel Download Button -
A25 STP A2524A-S2.5.stp Free Slide, 21.5" Travel Download Button -
A25 STP A2527A-S2.5.stp Free Slide, 24.5" Travel Download Button -
A25 STP A2530A-S2.5.stp Free Slide, 27.5" Travel Download Button -


Lead Screw / Rapid Advance

Series Type File Name Description Download View
1.5" Travel
A25 STP A2504D-S2.5.stp Rapid Advance - limited adj., 1.5" Travel Download Button -
A25 STP A2504Dx-S2.5_scale_vernier.stp Rapid Advance - limited adj. with scale and vernier, 1.5" Travel Download Button -
A25 STP A2504Gx-S2.5_micrometer.stp Rapid Advance - limited adj. with micrometer, 1.5" Travel Download Button -
A25 STP A2504Hx-S2.5_scale_vernier.stp Rapid Advance - unlimited adj. with scale and vernier, 1.5" Travel Download Button -
A25 STP A2504Hxx-S2.5.stp Rapid Advance - unlimited adj., 1.5" Travel Download Button -
A25 STP A2504xx-S2.5.stp Lead screw, basic knob and crank, 1.5" Travel Download Button -
A25 STP A2504xx-S2.5_scale_vernier.stp Lead screw. with scale and vernier, 1.5" Travel Download Button -
A25 STP A2504xxx-S2.5-TL Small Knob.stp Lead screw, basic knob and crank, small knob, with thumb lock, 1.5" Travel Download Button -
A25 STP A2504xxx-S2.5.stp Lead screw, graduated knob, 1.5" Travel Download Button -
3.5" Travel
A25 STP A2506D-S2.5.stp Rapid Advance - limited adj., 3.5" Travel Download Button -
A25 STP A2506Dx-S2.5_scale_vernier.stp Rapid Advance - limited adj. with scale and vernier, 3.5" Travel Download Button -
A25 STP A2506Dx-S2.5_scale_vernier-SLL.stp Rapid Advance - limited adj. with scale and vernier, 3.5" Travel with left mounted slider lock Download Button -
A25 STP A2506Gx-S2.5_micrometer.stp Rapid Advance - limited adj. with micrometer, 3.5" Travel Download Button -
A25 STP A2506Hx-S2.5_scale_vernier.stp Rapid Advance - unlimited adj. with scale and vernier, 3.5" Travel Download Button -
A25 STP A2506Hxx-S2.5.stp Rapid Advance - unlimited adj., 3.5" Travel Download Button -
A25 STP A2506xx-S2.5_scale_vernier.stp Lead screw. with scale and vernier, 3.5" Travel Download Button -
A25 STP A2506x-S2.5-LR.stp Lead screw left / right and crank, 3.5" Travel Download Button -
A25 STP A2506xx-S2.5.stp Lead screw, basic knob and crank, 3.5" Travel Download Button -
A25 STP A2506xxx-S2.5.stp Lead screw, graduated knob, 3.5" Travel Download Button -
A25 STP A2506xxx-S2.5-RC.stp Lead screw,graduated knob and crank, 3.5" Travel, with rev counter Download Button -
A25 STP A2506xxx-S2.5-TL.stp Lead screw, graduated knob and crank, 3.5" Travel, with thumb lock Download Button -
6.5" Travel
A25 STP A2509D-S2.5.stp Rapid Advance - limited adj., 6.5" Travel Download Button -
A25 STP A2509Dx-S2.5_scale_vernier.stp Rapid Advance - limited adj. with scale and vernier, 6.5" Travel Download Button -
A25 STP A2509Gx-S2.5_micrometer.stp Rapid Advance - limited adj. with micrometer, 6.5" Travel Download Button -
A25 STP A2509Hx-S2.5_scale_vernier.stp Rapid Advance - unlimited adj. with scale and vernier, 6.5" Travel Download Button -
A25 STP A2509Hxx-S2.5.stp Rapid Advance - unlimited adj., 6.5" Travel Download Button -
A25 STP A2509xx-S2.5_scale_vernier.stp Lead Screw with scale and vernier, 6.5" Travel Download Button -
A25 STP A2509x-S2.5-LR.stp Lead screw left / right and crank, 6.5" Travel Download Button -
A25 STP A2509xx-S2.5.stp Lead screw, basic knob and crank, 6.5" Travel Download Button -
A25 STP A2509xxx-S2.5.stp Lead screw, graduate knob, 6.5" Travel Download Button -
9.5" Travel
A25 STP A2512D-S2.5.stp Rapid Advance - limited adj., 9.5" Travel Download Button -
A25 STP A2512Dx-S2.5_scale_vernier.stp Rapid Advance - limited adj. with scale and vernier, 9.5" Travel Download Button -
A25 STP A2512Gx-S2.5_micrometer.stp Rapid Advance - limited adj. with micrometer, 9.5" Travel Download Button -
A25 STP A2512Hx-S2.5_scale_vernier.stp Rapid Advance - unlimited adj. with scale and vernier, 9.5" Travel Download Button -
A25 STP A2512Hxx-S2.5.stp Rapid Advance - unlimited adj., 9.5" Travel Download Button -
A25 STP A2512xx-S2.5_scale_vernier.stp Lead Screw. with scale and vernier, 9.5" Travel Download Button -
A25 STP A2512x-S2.5-LR.stp Lead screw left / right and crank, 9.5" Travel Download Button -
A25 STP A2512xx-S2.5.stp Lead screw, basic knob and crank, 9.5" Travel Download Button -
A25 STP A2512xxx-S2.5.stp Lead screw, graduate knob, 9.5" Travel Download Button -
12.5" Travel
A25 STP A2515D-S2.5.stp Rapid Advance - limited adj., 12.5" Travel Download Button -
A25 STP A2515Dx-S2.5_scale_vernier.stp Rapid Advance - limited adj. with scale and vernier, 12.5" Travel Download Button -
A25 STP A2515Gx-S2.5_micrometer.stp Rapid Advance - limited adj. with micrometer, 12.5" Travel Download Button -
A25 STP A2515Hx-S2.5_scale_vernier.stp Rapid Advance - unlimited adj. with scale and vernier, 12.5" Travel Download Button -
A25 STP A2515Hxx-S2.5.stp Rapid Advance - unlimited adj., 12.5" Travel Download Button -
A25 STP A2515xx-S2.5_scale_vernier.stp Lead Screw with scale and vernier, 12.5" Travel Download Button -
A25 STP A2515x-S2.5-LR.stp Lead screw left / right and crank, 12.5" Travel Download Button -
A25 STP A2515xx-S2.5.stp Lead screw, basic knob and crank, 12.5" Travel Download Button -
A25 STP A2515xxx-S2.5.stp Lead screw, graduate knob, 12.5" Travel Download Button -
15.5" Travel
A25 STP A2518D-S2.5.stp Rapid Advance - limited adj., 15.5" Travel Download Button -
A25 STP A2518Dx-S2.5_scale_vernier.stp Rapid Advance - limited adj. with scale and vernier, 15.5" Travel Download Button -
A25 STP A2518Gx-S2.5_micrometer.stp Rapid Advance - limited adj. with micrometer, 15.5" Travel Download Button -
A25 STP A25182Hx-S2.5_scale_vernier.stp Rapid Advance - unlimited adj. with scale and vernier, 15.5" Travel Download Button -
A25 STP A2518Hxx-S2.5.stp Rapid Advance - unlimited adj., 15.5" Travel Download Button -
A25 STP A2518x-S2.5-LR.stp Lead screw left / right and crank, 15.5" Travel Download Button -
A25 STP A2518xx-S2.5.stp Lead screw, basic knob and crank, 15.5" Travel Download Button -
A25 STP A2518xxx-S2.5.stp Lead screw, graduate knob, 15.5" Travel Download Button -
18.5" Travel
A25 STP A2521xx-S2.5.stp Lead screw, basic knob and crank, 18.5" Travel Download Button -
21.5" Travel
A25 STP A2524xx-S2.5.stp Lead screw, graduate knob, 21.5" Travel Download Button -
24.5" Travel
A25 STP A2527xx-S2.5.stp Lead screw, basic knob and crank, 24.5" Travel Download Button -