Airtac SCJ32 Standard Cylinder SCJ32X250-20S
The AirTAC Airtac SCJ32 Standard Cylinder SCJ32X250-20S 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, 250mm nominal stroke, PT1/8 ports and adjustable end cushioning.
- BoreØ32 mm
- Nominal stroke250 mm
- Stroke adjust-20 mm
- Port sizePT1/8
- Rod threadM10×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ32 Standard Cylinder SCJ32X250-20S
The SCJ32X250-20S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke, ideal for fine-tuning end positions during commissioning or format changes. Its rear adjusting screw provides up to 20 mm of stroke-end adjustment without replacing the cylinder, saving downtime on compact automation tasks. This model includes a built-in magnet, allowing direct mounting of CMSG/DMSG/EMSG sensors for reliable, non-contact position feedback.
With a 32 mm bore and 12 mm diameter rod, this cylinder delivers 402 N of push force at 0.5 MPa, making it a robust choice for light clamping, sorting, and material handling. The PT1/8 port and M10x1.25 rod thread ensure easy integration, while the 21 mm air cushion at each end protects the end caps from impact. Its body length A is 182 mm, providing a compact footprint for space-constrained machinery.
Airtac SCJ32 Standard Cylinder SCJ32X250-20S Technical Specifications
| Model | Airtac SCJ32 Standard Cylinder SCJ32X250-20S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø32 mm |
| Nominal stroke | 250 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 SCJ32X250-20S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 32 | Bore size in mm. |
| ×250 | 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 SCJ32X250-20S Is Used
Commissioning Fine-Tuning
Engineers use the 20 mm stroke-end adjustment to perfect the stopping position of a pick-and-place arm during initial machine setup, eliminating the need to shim or reposition the entire cylinder.
Wear Take-Up on Stops
On a packaging line, the adjustable screw compensates for wear on a mechanical stop pad over time, maintaining precise product positioning without replacing the actuator.
Sensor-Controlled Sorting Gate
The built-in magnet and CMSG sensors provide precise end-of-stroke signals for a sorting gate, while the adjustable stroke allows operators to fine-tune the gate opening for different product sizes.
Is the Airtac SCJ32 Standard Cylinder SCJ32X250-20S the Right Cylinder?
Select the SCJ32X250-20S when you need to precisely dial in a stroke end position on a 32 mm bore platform without swapping hardware. If your force requirement increases, stepping up to the SCJ40 bore provides 628 N of push force at the same 0.5 MPa pressure. For applications where the stroke is fixed after initial setup, a standard SC32X250 cylinder offers a simpler, non-adjustable alternative.
For a direct replacement, match an AirTAC SCJ cylinder with a 32 mm bore, 250 mm nominal stroke, 20 mm adjust range, PT ports, and a built-in magnet. This model uses the basic mounting style; if a pivoting motion is required, consider the TC centre trunnion with the F-SC32TC bracket. At a 250 mm stroke, ensure the load is guided to prevent rod bending 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 SCJ32X250-20S FAQ
At 0.5 MPa, the push force is 402 N and the pull force is 345 N. The pull force is lower because the 12 mm piston rod reduces the effective piston area on the return stroke. At the maximum operating pressure of 0.9 MPa, the push force reaches 724 N.
No. Like all standard pneumatic cylinders, the SCJ32X250-20S will not hold its position if air pressure is lost or the valve is centered. The adjusting screw only sets the stroke end position and does not act as a mechanical lock. You must add a pilot-operated check valve or an external rod brake to hold a load safely without live pressure.
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