Roller screw actuator
Tolomatic SWA/B Resistance Spot Welding and GSWA roller screw actuator
Tolomatic servo rod actuators for resistance spot-welding guns, listed only in the overview brochure.
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Select the products and performance you need. Our UK engineering team can use your specification to help source the right components, pricing and supply options. See your summary before adding contact details.
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What are you specifying?
Select everything you need. A motor, drive and gearbox can be specified together as one axis.
Key specifications
| Force (max) | 24,500 N |
|---|---|
| Stroke (max) | 457 mm |
| Linear speed (max) | 610 mm/s |
| Sizes | 3, 4, 33, 44, 55, GSWA 04 |
Series ranges as published; individual models vary. The full datasheet, drawings and CAD models are available on request.
Tolomatic SWA/B Resistance Spot Welding and GSWA replacement and alternative options
Use these supply-network options as a starting point for an engineering check. We can also help source the original Tolomatic part. Published series figures do not establish an exact-model or drop-in replacement: confirm ratings, fit, interfaces and approvals for your application.
Ball-screw servo electric cylinder in seven frame sizes from 32 to 150, with inline or reverse-parallel motor mounting and optional force sensing, aimed at hydraulic and pneumatic replacement.
| Published maximum | SWA/B Resistance Spot Welding and GSWA | SRB Linear Servo Actuator |
|---|---|---|
| Force | 24,500 N | 49,033 N meets or exceeds |
| Stroke | 457 mm | 1,000 mm meets or exceeds |
| Speed | 610 mm/s | 1,250 mm/s meets or exceeds |
Compact C7 ballscrew linear module with built-in guide, matched to 100-400 W servo motors from the main Japanese and Taiwanese brands.
| Published maximum | SWA/B Resistance Spot Welding and GSWA | BLM Built-in Linear Module |
|---|---|---|
| Force | 24,500 N | — |
| Stroke | 457 mm | 1,250 mm meets or exceeds |
| Speed | 610 mm/s | 1,600 mm/s meets or exceeds |
Steel-belt driven linear module with integral guide rail, intended as a long-stroke, high-speed replacement for pneumatic cylinders.
| Published maximum | SWA/B Resistance Spot Welding and GSWA | LB Belt-Drive Linear Actuator |
|---|---|---|
| Force | 24,500 N | — |
| Stroke | 457 mm | 3,050 mm meets or exceeds |
| Speed | 610 mm/s | 2,000 mm/s meets or exceeds |
Figures are the highest published for each series and are not always measured the same way. A higher figure is not automatically a better choice: mounting, duty cycle, feedback, connectors and approvals matter too. An engineer will check the fit against your application before recommending anything.
Typical applications
What a roller screw actuator is
A roller screw actuator is a rod actuator driven by a planetary roller screw instead of a ball screw. Threaded rollers sit between the screw and nut, so the load is spread across many line contacts rather than a limited number of balls. This gives much higher load capacity, stiffness and shock resistance in the same envelope, and typically several times the life of a ball screw of similar size. Inverted designs place the rollers on the rod, allowing the motor rotor to drive the nut directly.
When engineers choose a roller screw actuator
Choose a roller screw actuator for high forces, long life, heavy duty cycles or shock loads, such as presses, welding guns, test rigs and hydraulic replacement. The trade-offs are cost, which is higher than an equivalent ball screw, and lower efficiency at very fine leads. For moderate loads and duty, a ball screw is usually more economical. Roller screws also tolerate higher accelerations and speeds at a given diameter, which helps compact high-force designs.
How to specify the Tolomatic SWA/B Resistance Spot Welding and GSWA
Send these with your enquiry and an engineer can confirm the right SWA/B Resistance Spot Welding and GSWA variant:
- Peak and continuous force (N or kN)
- Full motion profile with dwell times
- Required life (km or cycles)
- Stroke (mm) and speed (mm/s)
- Shock or impact loads
- Mounting and side-load conditions
- Lubrication method and environment
Common mistakes to avoid
- Choosing a roller screw when duty and load would let a ball screw do the job
- Neglecting lubrication interval, which strongly affects roller screw life
- Calculating life on peak force instead of the cubic mean load
- Forgetting that motor and drive must also handle the peak force
Tolomatic SWA/B Resistance Spot Welding and GSWA: frequently asked questions
Can you help replace Tolomatic SWA/B Resistance Spot Welding and GSWA or source the original?
Send the full model code, quantity and required date. Our engineers can check original-part availability and assess suitable alternatives, including supply-network options where appropriate. We confirm compatibility and any changes needed before recommending a replacement.
What is the Tolomatic SWA/B Resistance Spot Welding and GSWA?
Tolomatic servo rod actuators for resistance spot-welding guns, listed only in the overview brochure. Published series figures include force 24,500 N, stroke 457 mm, linear speed 610 mm/s. It is available through our supply network, and our engineers can confirm the right variant for your application.
Who makes the Tolomatic SWA/B Resistance Spot Welding and GSWA?
The Tolomatic SWA/B Resistance Spot Welding and GSWA is made by Tolomatic (Tolomatic Inc.) available through our supply network. Send us your requirement for pricing, lead time, datasheets and CAD.
What is the force of the Tolomatic SWA/B Resistance Spot Welding and GSWA?
The published series maximum force is 24,500 N. Individual models and sizes in the SWA/B Resistance Spot Welding and GSWA range vary, so check the exact variant against your duty cycle, mounting and environment, or ask our engineers to confirm the right size for you.
Is there an alternative to the Tolomatic SWA/B Resistance Spot Welding and GSWA?
We can assess suitable replacement options. On published figures, Motion Control Products SRB Linear Servo Actuator and Motion Control Products BLM Built-in Linear Module are options to assess from our supply network. An engineer confirms the fit against your application before recommending anything.
Why are roller screws longer lasting than ball screws?
In a planetary roller screw, the load is carried across many line contacts on the threaded rollers, while a ball screw carries load through point contacts on a limited number of balls. Lower contact stress per point gives more load capacity and a longer fatigue life for the same size, typically several times longer at the same load.
When is a ball screw a better choice than a roller screw?
A ball screw is usually better value for moderate loads, normal duty and modest life targets, and it is more widely available in standard sizes and leads. Choose a roller screw when force, shock, stiffness or life requirements push a ball screw beyond a sensible size. Calculating life with the real cycle usually shows which applies.
Further reading: Ball screw vs roller screw · Hydraulic to electric actuator · Linear actuators
Often compared with
Engineers specifying this series often compare it with:
Other roller screw actuator series
Engineer support
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