Airtac SCJ32 Standard Cylinder SCJ32X125-20
The AirTAC Airtac SCJ32 Standard Cylinder SCJ32X125-20 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 mm range without swapping the cylinder. Ø32mm bore, 125mm nominal stroke, PT1/8 ports and adjustable end cushioning.
- BoreØ32 mm
- Nominal stroke125 mm
- Stroke adjust-20 mm
- Port sizePT1/8
- Rod threadM10×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ32 Standard Cylinder SCJ32X125-20
The SCJ32X125-20 is a double-acting, single-rod tie-rod cylinder with a rear adjusting screw that provides up to 20 mm of field-adjustable stroke-end positioning. At 0.5 MPa, it delivers 402 N of push force and 345 N on the pull stroke, making it a compact workhorse for light automation tasks where the final stop point needs fine-tuning during commissioning or changeover.
With a 12 mm piston rod, PT1/8 ports, and a 21 mm air cushion, this genuine AirTAC unit handles operating pressures from 0.15 to 1.0 MPa and speeds of 30-800 mm/s. The 182 mm body length (A dimension) keeps the footprint tight, while the screw adjuster lets you dial in the exact stroke end without adding external hard stops or swapping to a different cylinder model.
Airtac SCJ32 Standard Cylinder SCJ32X125-20 Technical Specifications
| Model | Airtac SCJ32 Standard Cylinder SCJ32X125-20 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø32 mm |
| Nominal stroke | 125 mm |
| Stroke adjustment | Up to 20 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 SCJ32X125-20
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 32 | Bore size in mm. |
| ×125 | Nominal (maximum) stroke length in mm. |
| -20 | 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 SCJ32X125-20 Is Used
Commissioning & Setup
Dial in the exact end-of-stroke position during machine build without machining custom stops. The 20 mm screw adjustment lets technicians fine-tune the actuator throw on the fly.
Small-Part Ejectors
Adjust the push stroke of a reject gate or diverter to match different product widths. The 125 mm nominal stroke covers a wide range, and the screw trims the final few millimetres for precise alignment.
Wear Take-Up
Compensate for pad or gripper wear over time by advancing the stroke end. The 20 mm range provides ample adjustment to maintain consistent contact pressure without replacing the cylinder.
Is the Airtac SCJ32 Standard Cylinder SCJ32X125-20 the Right Cylinder?
Choose the SCJ32 when you need up to 402 N of push force at 0.5 MPa and the ability to trim the stroke end by up to 20 mm. If your force requirement grows, step up to the 40 mm bore SCJ40 which provides 628 N push at the same pressure. For applications that do not require stroke adjustment, the fixed-stroke SC32 series offers a simpler, lower-cost alternative.
To replace this cylinder, match the 32 mm bore, 125 mm nominal stroke, 20 mm adjustment range, PT1/8 port thread, and basic mounting style. If you need piston position sensing, order the SCJ32X125-20S variant with a built-in magnet for CMSG/DMSG sensors. For guided loads or long-stroke applications, consider an external guide rail to protect the 12 mm rod from side forces.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-20)
- ✓ 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 SCJ32X125-20 FAQ
At 0.5 MPa, the push force is 402 N and the pull force is 345 N. At the maximum operating pressure of 0.9 MPa, the push force reaches 724 N. The pull force is lower because the 12 mm piston rod reduces the effective piston area on the return stroke.
Yes, if you need the ability to fine-tune the stroke end. The SCJ32X125-20 matches the SC32's 32 mm bore, 125 mm nominal stroke, and mounting interfaces, but adds a rear adjusting screw with a 20 mm range. Ensure your mounting space accommodates the slightly longer SCJ body length of 182 mm.
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