The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X225-50S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø63mm bore, 225mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X225-50S is a 63 mm bore, double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end. A rear-cap adjusting screw lets you shorten the stroke by up to 50 mm without removing the cylinder, making it ideal for commissioning fine-tuning and format changeovers. This model includes a built-in magnet for direct mounting of CMSG/DMSG/EMSG sensors, and its 20 mm rod delivers 1559 N of push force at 0.5 MPa.
With a 225 mm nominal stroke, it operates within the standard range for its bore class. The cylinder features a 28 mm air cushion for smooth deceleration and a PT1/4 port. Its tie-rod construction and single-rod design mean push force is greater than pull force, suiting it for unidirectional workholding and clamping tasks where the stroke end position must be precisely dialed in on the machine.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X225-50S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 225 mm |
| Stroke adjustment | Up to 50 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, 28 mm |
| Max stroke | Up to 1500 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 | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 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. |
|---|---|
| 63 | Bore size in mm. |
| ×225 | Nominal (maximum) stroke length in mm. |
| -50 | 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 50 mm adjust range allows technicians to dial in the exact stroke end position during initial machine setup without swapping cylinders or machining hard stops, speeding up production line commissioning.
Quickly adapt the cylinder's stroke end for different product sizes on packaging or sorting lines. The rear screw adjustment enables a single actuator to handle multiple formats, reducing changeover time.
Ideal for clamping fixtures where the final jaw position needs fine-tuning to accommodate part tolerances or tooling wear. The 1559 N push force at 0.5 MPa provides a secure hold, while the magnet enables clamp-position feedback.
Choose the SCJ63X225-50S when you need to fine-tune the stroke end position within a 50 mm window on a 225 mm nominal stroke. If your application requires more force, step up to the 80 mm bore SCJ series, which provides 2513 N of push at 0.5 MPa. For a fixed, non-adjustable stroke, the standard SC63X225 is a simpler alternative. This model replaces any AirTAC SCJ63 cylinder with a 225 mm stroke, 50 mm adjust range, PT ports, basic mounting, and a magnet. For strokes of this length, be mindful of side loads; if the rod is not guided externally, consider adding a guide rod or switching to a guided cylinder to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
At the standard operating pressure of 0.5 MPa, this 63 mm bore cylinder generates 1559 N of push force and 1402 N of pull force. The maximum push force at 0.9 MPa is 2805 N. The push force is higher than the pull force because the single rod reduces the effective piston area on the return stroke.
A screw in the rear cap mechanically limits the piston's stroke end, allowing you to shorten the stroke by up to 50 mm from the 225 mm nominal maximum. It does not adjust force or speed. A direct replacement must be another AirTAC SCJ63 with a 225 mm nominal stroke, a 50 mm adjust range, PT ports, and a magnet (S suffix).
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