Airtac SCJ32 Standard Cylinder SCJ32X25-20S
The AirTAC Airtac SCJ32 Standard Cylinder SCJ32X25-20S 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, 25mm nominal stroke, PT1/8 ports and adjustable end cushioning.
- BoreØ32 mm
- Nominal stroke25 mm
- Stroke adjust-20 mm
- Port sizePT1/8
- Rod threadM10×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ32 Standard Cylinder SCJ32X25-20S
The SCJ32X25-20S brings field-adjustable stroke control to compact 32 mm bore applications, letting you fine-tune the piston end position by up to 20 mm without swapping the cylinder. Its single-rod double-acting design delivers 402 N of push force at 0.5 MPa, while the rear adjusting screw provides a simple, mechanical way to dial in the exact stopping point during commissioning or format changes.
This model includes a built-in magnet, so standard CMSG/DMSG/EMSG sensors clamp directly onto the tie-rod barrel for reliable end-of-stroke detection. With a 12 mm rod, M10x1.25 rod thread, and PT1/8 ports, it fits neatly into light automation, testing, and positioning tasks where space is tight and stroke flexibility matters.
Airtac SCJ32 Standard Cylinder SCJ32X25-20S Technical Specifications
| Model | Airtac SCJ32 Standard Cylinder SCJ32X25-20S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø32 mm |
| Nominal stroke | 25 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 SCJ32X25-20S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 32 | Bore size in mm. |
| ×25 | 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 SCJ32X25-20S Is Used
Commissioning Fine-Tuning
During machine setup, the 20 mm adjust range lets technicians precisely set the end stop for pick-and-place or ejection strokes without mechanical rework, speeding up line start.
Wear Take-Up in Clamping
In light-duty clamping or pressing, the adjustable screw compensates for pad wear or part tolerance drift over time, maintaining consistent contact force without changing the cylinder.
Small Part Diverting
On mini conveyors, the SCJ32X25-20S acts as an adjustable stop or diverter gate. The stroke end can be dialed in to handle different product widths, and the magnet confirms gate position.
Is the Airtac SCJ32 Standard Cylinder SCJ32X25-20S the Right Cylinder?
Choose the SCJ32X25-20S when you need to adjust the stroke end on the fly within a 20 mm window. If your force requirement grows, stepping up to the 40 mm bore SCJ40 series provides 628 N of push at the same pressure. For applications where the stroke never needs field adjustment, the fixed-stroke SC32 series is a simpler, cost-effective alternative. This cylinder replaces any AirTAC SCJ32X25-20S with the same bore, nominal stroke, 20 mm adjust range, PT ports, and built-in magnet.
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 SCJ32X25-20S FAQ
At 0.5 MPa, the push force is 402 N and the pull force is 345 N. The force increases to 724 N of push force at the maximum operating pressure of 0.9 MPa.
A screw in the rear cap limits how far the piston can retract, effectively shortening the stroke end by up to 20 mm from the nominal 25 mm. It does not change the cylinder's bore or force output, only the mechanical stopping position.
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