The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X275-30S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø63mm bore, 275mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X275-30S delivers a nominal 275 mm stroke that you can fine-tune by up to 30 mm at the rear cap, giving you a 1559 N push force at 0.5 MPa (2805 N at 0.9 MPa) in a single-rod, double-acting package. Its 20 mm rod and PT1/4 ports handle mid-range pneumatic tasks, while the 28 mm air cushion protects the end caps during rapid cycling.
A built-in magnet lets you clamp CMSG, DMSG, or EMSG sensors directly onto the tie-rod barrel for contactless position feedback, making this unit ready for automated sequencing right out of the box. The body length A(SCJ) is 197 mm plus stroke, so it fits where a fixed-stroke SC would, yet adds on-machine adjustability.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X275-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 275 mm |
| Stroke adjustment | Up to 30 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. |
| ×275 | Nominal (maximum) stroke length in mm. |
| -30 | 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.
Dial in the exact end position during machine commissioning without swapping cylinders or machining external stops, saving hours of mechanical rework.
Adjust the stroke end in seconds when a packaging line switches between product sizes, eliminating the need for multiple fixed-stroke cylinders.
Take up mechanical wear in gripper or clamp linkages over time by advancing the rear screw, restoring precise contact without replacing the actuator.
Step up to the 80 mm bore if your load demands more than 2805 N push at 0.9 MPa (the SCJ80 gives 4523 N). If you need a fixed stroke with no field adjustment, the standard SC63 cylinder is the direct alternative. For replacement, match the 63 mm bore, 275 mm nominal stroke, 30 mm adjust range, PT1/4 ports, basic mounting, and the -S magnet option.
At 275 mm stroke, side-loading can bend the 20 mm rod. If your application applies any radial force, add an external guide rail or switch to a guided cylinder to protect the rod bearings and seals.
Adjustable-stroke checklist
At 0.5 MPa it delivers 1559 N pushing and 1402 N pulling. At the maximum operating pressure of 0.9 MPa, push force reaches 2805 N. The pull force is lower because the 20 mm rod reduces the piston area on the return side.
Yes, if you need field-adjustable stroke end. Match the 63 mm bore, 275 mm nominal stroke, PT1/4 ports, and ensure the -S magnet is present if your existing setup uses sensors. The SCJ body is slightly longer to house the adjusting screw.
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