Airtac SCJ32 Standard Cylinder SCJ32X125-20S
The AirTAC Airtac SCJ32 Standard Cylinder SCJ32X125-20S 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 SCJ32X125-20S
The SCJ32X125-20S is a 32 mm bore, single-rod double-acting cylinder with a rear adjusting screw that provides up to 20 mm of field-adjustable stroke-end reduction from the 125 mm nominal maximum. Its 12 mm diameter rod delivers 402 N of push force and 345 N of pull force at 0.5 MPa, making it a compact workhorse for light positioning tasks where the final stop point needs fine-tuning during commissioning or changeover.
This model includes a built-in magnet (suffix -S), allowing easy attachment of CMSG/DMSG/EMSG reed or solid-state sensors directly to the tie-rod barrel for end-of-stroke position feedback. The cylinder body length A(SCJ) is 182 mm, and it features an adjustable air cushion of 21 mm for smooth deceleration. The standard PT1/8 port and M10x1.25 rod thread ensure straightforward pneumatic connections.
Airtac SCJ32 Standard Cylinder SCJ32X125-20S Technical Specifications
| Model | Airtac SCJ32 Standard Cylinder SCJ32X125-20S |
|---|---|
| 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 SCJ32X125-20S
| 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 SCJ32X125-20S Is Used
Commissioning Fine-Tuning
The 20 mm adjustment screw lets technicians dial in the exact stroke end on a new assembly line without swapping cylinders or machining external hard stops, speeding up the commissioning process.
Small Part Ejector
Used as a pneumatic ejector on a conveyor, the adjustable stroke allows operators to compensate for wear on a pusher plate or fine-tune the ejection distance for different product sizes.
Sensing Gate Actuator
With the built-in magnet and sensors, this cylinder provides reliable end-of-stroke confirmation for a small sorting gate, where the adjustable end position ensures a perfect seal or alignment every time.
Is the Airtac SCJ32 Standard Cylinder SCJ32X125-20S the Right Cylinder?
Step up to the 40 mm bore SCJ (628 N push at 0.5 MPa) if the 402 N output of this 32 mm unit is marginal for your load. For applications requiring a fixed, non-adjustable stroke, the standard SC series offers a simpler, more cost-effective solution. This SCJ32X125-20S is a direct replacement for any AirTAC SCJ32 cylinder with a 125 mm nominal stroke, a 20 mm adjust range, PT ports, and a magnet, ensuring drop-in compatibility without re-engineering the machine's end-stop layout.
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 SCJ32X125-20S FAQ
At the standard operating pressure of 0.5 MPa, this cylinder delivers 402 N of push force and 345 N of pull force. The maximum push force at 0.9 MPa is 724 N. Remember that as a single-rod cylinder, the push force is greater than the pull force due to the rod area on the piston.
Yes, provided the mounting and porting match. The SCJ32X125-20S has the same body length A(SCJ) of 182 mm and offers the same force output as an SC32. The key difference is the rear adjusting screw, which gives you the ability to shorten the stroke end by up to 20 mm, a feature not available on the fixed-stroke SC series.
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