Airtac SCJ32 Standard Cylinder SCJ32X120-30S
The AirTAC Airtac SCJ32 Standard Cylinder SCJ32X120-30S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø32mm bore, 120mm nominal stroke, PT1/8 ports and adjustable end cushioning.
- BoreØ32 mm
- Nominal stroke120 mm
- Stroke adjust-30 mm
- Port sizePT1/8
- Rod threadM10×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ32 Standard Cylinder SCJ32X120-30S
The SCJ32X120-30S is a double-acting, single-rod pneumatic cylinder that puts precise stroke-end tuning directly in your hands. Its rear-cap adjusting screw provides up to 30 mm of field-adjustable stroke reduction, allowing you to dial in the exact end position without swapping the cylinder or adding external hard stops. With a 12 mm diameter piston rod and M10x1.25 rod thread, it delivers 402 N of push force at 0.5 MPa, making it a compact workhorse for light automation tasks.
This model includes a built-in magnet (-S suffix), so you can clamp CMSG, DMSG, or EMSG reed and solid-state sensors directly onto the tie-rod barrel for reliable, non-contact position sensing. The body length A(SCJ) is 182 mm, and the 21 mm air cushion at each end decelerates the piston smoothly, protecting the end caps during high-cycle operation. It's a genuine AirTAC component, ready to integrate into your machine's control system.
Airtac SCJ32 Standard Cylinder SCJ32X120-30S Technical Specifications
| Model | Airtac SCJ32 Standard Cylinder SCJ32X120-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø32 mm |
| Nominal stroke | 120 mm |
| Stroke adjustment | Up to 30 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/8 |
| Rod thread | M10×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 21 mm |
| Max stroke | Up to 1000 mm |
Specifications follow the official AirTAC SCJ (adjustable-stroke) datasheet. The rear adjusting screw sets the stroke end position; force is the same as the equivalent single-rod SC bore. Confirm against the product label before installation. Thread options: PT (standard) / G.
Theoretical Output Force (Ø32mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 402 N | 346 N |
| 0.7 MPa | 563 N | — |
| Max (@1.0 MPa) | 82 kgf | |
SCJ is single-rod, so force matches the equivalent SC bore: push uses the full bore area, pull subtracts the rod area. Actual usable force is lower than theoretical due to friction and back-pressure; size with a safety margin.
Model Code: Airtac SCJ32 Standard Cylinder SCJ32X120-30S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 32 | Bore size in mm. |
| ×120 | Nominal (maximum) stroke length in mm. |
| -30 | Adjustable-stroke range in mm (options 10/20/30/40/50/75/100). |
| -S | Optional built-in magnet for sensor position sensing. |
Related types: SC (single rod, fixed stroke), SCD (double rod), SCT (multi-position). SCJ mounting: Basic, FA, LB, TC, TCM1. Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
Where the Airtac SCJ32 Standard Cylinder SCJ32X120-30S Is Used
Commissioning & Fine-Tuning
During machine setup, the 30 mm adjustment screw lets technicians precisely dial in the actuator's end-stop for part placement, eliminating the need to machine custom shims or reposition the entire cylinder.
Small-Part Clamping & Ejection
Ideal for clamping fixtures or ejecting small components on an assembly line, where the stroke end position must be set exactly to avoid crushing delicate parts, with 402 N of push force at 0.5 MPa.
Wear Compensation
In high-cycle applications, the adjustable stroke can be incrementally extended to compensate for wear on tooling or gripper pads, maintaining consistent contact pressure without reprogramming the machine.
Is the Airtac SCJ32 Standard Cylinder SCJ32X120-30S the Right Cylinder?
Choose the 32 mm bore when your application needs a compact actuator with a push force around 402 N at standard plant air. If you require more force, stepping up to the 40 mm bore provides 628 N of push force at the same 0.5 MPa pressure. For applications where the stroke length is fixed and will never need field adjustment, the standard SC32 series offers a simpler, more cost-effective solution without the rear adjusting mechanism. If your load creates a significant side force, consider an external guide rail, as this is a single-rod cylinder not designed to support radial loads.
This SCJ32X120-30S is a direct replacement for any AirTAC SCJ32 cylinder with a 120 mm nominal stroke, a 30 mm adjustment range, PT ports, and a built-in magnet. Ensure the replacement matches the same bore, nominal stroke, and adjustable range to maintain your machine's calibrated end positions.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-30)
- ✓ Required force at your working pressure
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Set the rear adjusting screw, then lock it before running.
- check Adjust end cushion screws for smooth stops.
- check Use SCJ mounting accessory (FA / LB / TC / TCM1).
- check Installation by qualified personnel per AirTAC docs.
Airtac SCJ32 Standard Cylinder SCJ32X120-30S FAQ
At 0.5 MPa operating pressure, the cylinder provides a push force of 402 N and a pull force of 345 N. The push force is greater because the single rod reduces the effective piston area on the return stroke. The maximum push force at the 0.9 MPa operating limit is 724 N.
The rear-cap adjusting screw limits the piston's outward travel by up to 30 mm from the nominal 120 mm stroke, setting a precise mechanical end stop. This screw does not lock the piston in place; if air pressure is lost or the valve is centered, the rod can drift. For position holding without pressure, you must add an external rod brake or a pilot-operated check valve.
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