The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X25-10S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 10 mm range without swapping the cylinder. Ø50mm bore, 25mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ50X25-10S is a double-acting, single-rod pneumatic cylinder from AirTAC, engineered with a rear-cap adjusting screw that provides a 10 mm field-adjustable stroke range. This allows precise end-position tuning without removing the cylinder, ideal for commissioning and fine setup adjustments. The 50 mm bore delivers a substantial 982 N of push force at a standard 0.5 MPa operating pressure, with a 20 mm diameter piston rod.
This model features a built-in magnet (-S suffix), enabling direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors along the tie-rod barrel for reliable, non-contact position feedback. The body length is 194 mm, and it uses a PT1/4 port with an M16x1.5 rod thread. The standard TPU seal offers a wide operating temperature range from -20 to +70 °C, making it a versatile workhorse for general industrial automation tasks.
| Model | Airtac SCJ50 Standard Cylinder SCJ50X25-10S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 25 mm |
| Stroke adjustment | Up to 10 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| 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 1200 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.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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.
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×25 | Nominal (maximum) stroke length in mm. |
| -10 | 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.
The 10 mm adjustment screw lets technicians dial in the exact stroke end-point during initial machine setup, compensating for small assembly tolerances without needing to shim or modify the cylinder mounting.
Used as a pneumatic part stop on a conveyor, the adjustable stroke allows operators to quickly change the stopping position for different product sizes, providing flexible line changeovers with the sensor confirming the retracted position.
In a light-duty clamping fixture, the adjustable stroke end prevents over-travel and crushing of delicate parts. The 982 N push force at 0.5 MPa is sufficient for secure holding, and the built-in magnet confirms clamp engagement.
Choose the SCJ50X25-10S when your application requires a compact 25 mm nominal stroke with the ability to fine-tune the end position by up to 10 mm. If you need more force, stepping up to the 63 mm bore provides 1559 N of push force at the same pressure. For applications where the stroke is fixed and will never need adjustment, the standard SC50X25 fixed-stroke cylinder is a simpler, cost-effective alternative. A direct replacement must match the 50 mm bore, 25 mm nominal stroke, 10 mm adjust range, PT1/4 port, basic mounting, and the integrated magnet for sensor compatibility.
Adjustable-stroke checklist
At the standard operating pressure of 0.5 MPa, this 50 mm bore cylinder produces 982 N of push force and 825 N of pull force. The maximum push force at the 0.9 MPa operating limit is 1767 N. The force is identical to a fixed-stroke SC50 cylinder.
Yes, this is a genuine AirTAC SCJ50X25-10S. It is a direct form-and-function replacement for any AirTAC SCJ adjustable-stroke cylinder with a 50 mm bore, 25 mm nominal stroke, 10 mm adjust range, PT port, basic mount, and a built-in magnet for sensors. Always verify your port thread and sensor type.
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