Airtac SCJ32 Standard Cylinder SCJ32X250-40
The AirTAC Airtac SCJ32 Standard Cylinder SCJ32X250-40 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 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-40 mm
- Port sizePT1/8
- Rod threadM10×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ32 Standard Cylinder SCJ32X250-40
The SCJ32X250-40 is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, allowing operators to fine-tune the 250 mm nominal stroke by up to 40 mm via the rear-cap adjusting screw. This 32 mm bore actuator delivers 402 N of push force at 0.5 MPa (724 N at the 0.9 MPa maximum operating pressure), making it suitable for light clamping, sorting, and diverting tasks where the final stop position needs commissioning flexibility.
Built on a durable tie-rod body with a length of 182 mm (A dimension), the cylinder uses a 12 mm diameter piston rod with an M10x1.25 knuckle thread and PT1/8 ports. The unit includes an adjustable air cushion (21 mm length) for smooth deceleration and operates reliably across a temperature range of -20 to +70 °C with its standard TPU seals.
Airtac SCJ32 Standard Cylinder SCJ32X250-40 Technical Specifications
| Model | Airtac SCJ32 Standard Cylinder SCJ32X250-40 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø32 mm |
| Nominal stroke | 250 mm |
| Stroke adjustment | Up to 40 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 SCJ32X250-40
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 32 | Bore size in mm. |
| ×250 | Nominal (maximum) stroke length in mm. |
| -40 | 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 SCJ32X250-40 Is Used
Commissioning & Setup
The 40 mm adjustment range lets technicians fine-tune the end-of-stroke position during initial machine commissioning, dialing in the exact stop point for sensors or part contact without mechanical rework.
Diverter Gates
Used on light-duty conveyor gates, the adjustable stroke compensates for wear on the gate seal or changes in product width, maintaining a reliable seal without reprogramming the PLC.
Clamping Fixtures
In a pneumatic clamping fixture, the screw adjustment allows the operator to set the precise clamping depth for a new batch of parts, ensuring consistent holding force without over-travel.
Is the Airtac SCJ32 Standard Cylinder SCJ32X250-40 the Right Cylinder?
Select the SCJ32X250-40 when you need to dial in the stroke end position during setup or format changes without replacing the cylinder. If 402 N of push force at 0.5 MPa is insufficient, stepping up to the 40 mm bore (SCJ40) provides 628 N at the same pressure. For applications requiring a rigid, fixed stroke with no adjustment, the standard SC32X250 is a simpler alternative. This model is a direct replacement for another AirTAC SCJ32 cylinder with a 250 mm nominal stroke, a 40 mm adjustment range, PT ports, and basic mounting.
At a 250 mm stroke, ensure the load is guided to prevent rod bending; if side loads are present, add an external guide rail or consider a guided cylinder series.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-40)
- ✓ 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 SCJ32X250-40 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 rod reduces the effective piston area on the return stroke.
Yes, the SCJ32X250-40 shares the same bore, port size (PT1/8), and mounting accessories (FA, LB, TC) as the SC32 series. The body length is slightly longer to house the adjusting screw. Ensure the 40 mm adjustment range fits your machine envelope.
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