Rod actuator
Tolomatic RSA-ST (standard thrust) rod actuator
General-purpose electric rod actuator in six sizes with solid, bronze or ball screws and inline or reverse-parallel motor mounting; a broad pneumatic/hydraulic replacement workhorse.
Need this part, a replacement or a complete package? Our experienced UK engineering team helps you select, source and obtain the right products, with pricing, delivery coordination and after-sales support.
Pricing and availability
Get pricing, sourcing and replacement support
Need Tolomatic parts, a replacement or a suitable alternative? Send us a part number, or tell us what the machine needs to do. Our UK engineers will come back with the right product, pricing, lead time and delivery, whether that is the original part, a checked alternative or a complete axis.
- Original parts or a checked alternative
- Pricing, lead time and delivery in one reply
- Components, complete axes and ongoing support
No obligation. Add what you know and an engineer will help with the rest. Prefer to configure it? Build a specification.
Spec builder
Configure Tolomatic RSA-ST (standard thrust)
Select every part you need and answer the questions an applications engineer would ask. Our engineers use your specification to come back with the right products, pricing and lead times. You see your summary before we ask for any details.
Already know the part number? Send it to us directly.
- 1Products
- 2Performance
- 3Environment
- 4Volumes
- 5Your spec
What are you specifying?
Select everything you need. A motor, drive and gearbox can be specified together as one axis.
Key specifications
| Ingress protection | IP67 option on sizes 32/50/64 with RP mount only; gasket kit on request |
|---|---|
| Temperature | 4–54 °C |
| Force (max) | 17,917 N |
| Stroke (max) | 1,524 mm |
| Linear speed (max) | 3,124 mm/s |
| Screw lead | 2.54, 3.18, 5, 5.08, 6.35, 10, 12.7, 20, 24.9, 25.4, 47.92 |
| Screw type | acme solid nut, bronze nut, ball (inch and metric) |
| Backlash | 0.05 (low-backlash ball) to 0.38 (standard ball) |
| Duty | not stated |
| Sizes | 12, 16, 24, 32, 50, 64 |
| Lead accuracy | metric ball ±0.051 mm/300 mm |
| Temp extended | -40 to 60 °C on request |
Series ranges as published; individual models vary. The full datasheet, drawings and CAD models are available on request.
Engineer support
Speak to our engineers about your project
Our experienced engineers are on hand, ready to help with your project. Whether you need the Tolomatic RSA-ST (standard thrust) itself, help sourcing it, or a modified or custom design built around your load, speed and space, tell us what the machine has to do and we'll come back with the right option.
- Help sourcing RSA-ST (standard thrust) and spares for installed machines
- Modified and custom designs when a catalogue part doesn't fit
- Complete axis: motor, drive, gearing and feedback matched together
Tolomatic RSA-ST (standard thrust) model codes
Published model codes in the RSA-ST (standard thrust) range, with key figures from the manufacturer's data. Search this page for your part number, or send it to us for availability, pricing and lead time.
| Model code | Max force (N) | Max stroke (mm) | Max speed (mm/s) | Pricing / replacement |
|---|---|---|---|---|
| RSA12 | 578 | 305 | 3120 | Quote or replacement for RSA12 → |
| RSA16 | 578 | 457 | 3120 | Quote or replacement for RSA16 → |
| RSA24 | 7562 | 610 | 1270 | Quote or replacement for RSA24 → |
| RSA32 | 18500 | 914 | 1320 | Quote or replacement for RSA32 → |
| RSA50 | 35000 | 1219 | 1320 | Quote or replacement for RSA50 → |
| RSA64 | 58000 | 1524 | 1570 | Quote or replacement for RSA64 → |
Options
- inline LMI or reverse-parallel 1:1/2:1
- customer, factory-fitted or Tolomatic-supplied motor
- MP2, FFG, TRR mounts; BFG/PCD/PCS on RP
- MET, CLV, SRE, ALC, XR rod ends
- reed/PNP/NPN switches
- metric tapped holes
- low-backlash ball nut
Typical applications
What a rod actuator is
A rod actuator, sometimes called an electric cylinder, converts motor rotation into linear thrust through a screw and nut inside a tube, pushing a rod in and out like a pneumatic or hydraulic cylinder. The screw is usually a ball screw for efficiency, a roller screw for heavy loads or a lead screw for low cost. The rod is guided by bearings in the tube and an anti-rotation feature, and the motor is mounted inline or folded alongside through a belt or gear stage.
When engineers choose a rod actuator
Choose a rod actuator when the load is guided externally and needs pushing or pulling with controlled force, speed and position, typically to replace a pneumatic or hydraulic cylinder. It brings programmable positions, force control and energy savings. The trade-offs are side load and cost: the rod is not meant to carry significant radial load, and peak force for its size is lower than hydraulics. If the load needs carrying and guiding along the stroke, a rodless actuator or stage is usually better.
How to specify the Tolomatic RSA-ST (standard thrust)
Send these with your enquiry and an engineer can confirm the right RSA-ST (standard thrust) variant:
- Force: peak and continuous or RMS (N)
- Stroke (mm) and retracted length limits
- Speed and acceleration (mm/s, m/s²)
- Duty cycle or full motion profile
- Positioning repeatability (mm)
- Side load and mounting arrangement: trunnion, clevis or flange
- Motor and feedback preference, and environment (IP code, °C)
Common mistakes to avoid
- Sizing on peak force alone instead of RMS force over the cycle
- Rigidly mounting both ends so misalignment puts side load on the rod
- Ignoring critical speed and column buckling on long strokes
- Forgetting that a ball screw back-drives, so vertical loads need a brake
Tolomatic RSA-ST (standard thrust): frequently asked questions
Can you help replace Tolomatic RSA-ST (standard thrust) 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 RSA-ST (standard thrust)?
General-purpose electric rod actuator in six sizes with solid, bronze or ball screws and inline or reverse-parallel motor mounting; a broad pneumatic/hydraulic replacement workhorse. Published series figures include temperature 4 °C, temperature 54 °C, force 17,917 N, stroke 1,524 mm. It is available through our supply network, and our engineers can confirm the right variant for your application.
What model codes are in the Tolomatic RSA-ST (standard thrust) range?
The RSA-ST (standard thrust) range includes RSA12, RSA16, RSA24, RSA32, RSA50, RSA64. The table on this page lists each published model code with its key figures. Send us the code you use, or the one you need to replace, and our engineers will confirm availability, lead time or the closest equivalent.
Who makes the Tolomatic RSA-ST (standard thrust)?
The Tolomatic RSA-ST (standard thrust) 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 temperature of the Tolomatic RSA-ST (standard thrust)?
The published series minimum temperature is 4 °C. Individual models and sizes in the RSA-ST (standard thrust) 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 RSA-ST (standard thrust)?
We can assess suitable replacement options. Our engineers can review the original model and propose options for your load, speed and environment. An engineer confirms the fit against your application before recommending anything.
What is the difference between a rod actuator and a rodless actuator?
A rod actuator pushes and pulls a rod extending from its body, so it suits loads that are guided by the machine, much like a cylinder. A rodless actuator moves a carriage along the body and carries the load itself, which handles moment loads and long strokes within the actuator's own length. Pick rod for thrust and rodless for carrying.
Can an electric rod actuator replace a hydraulic cylinder?
Often, yes, especially where force needs are moderate and precise positioning, cleanliness or energy savings matter. Electric rod actuators with roller screws reach high forces, but extreme forces in a small envelope still favour hydraulics. Compare peak and continuous force, duty, shock loads and space, and check the motor and drive sizing as well as the screw.
Further reading: How to size a linear actuator · Hydraulic to electric actuator · Linear actuators
Often compared with
Engineers specifying this series often compare it with:
Other rod actuator series
Engineer support
Need Tolomatic RSA-ST (standard thrust) or a complete system around it?
Tell us the part or application, quantity and timing. Our UK engineers will come back with the right product, pricing, lead time and delivery.
- Reviewed by an engineer, not an autoresponder
- Like-for-like and better-fit alternatives
- Standard, modified and custom options
Prefer to configure it? Use the spec builder.
How it works
From enquiry to delivery
Send a part number or describe the application. Our engineers take it from there: the right product, a clear quotation, and delivery and support arranged.
- 01Tell us what you needSend a part number, or configure the application, quantities and timing.
- 02An engineer reviews itWe check the specification and find the original part, a checked equivalent or a complete axis.
- 03Receive your quotationProducts, pricing, lead time and compatibility notes in one reply.
- 04Order and deliveryWhen you are happy, the order is placed and delivery and after-sales support are arranged.