The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X250-100S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 100 mm range without swapping the cylinder. Ø63mm bore, 250mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X250-100 is a double-acting, single-rod pneumatic cylinder with a rear-cap adjusting screw that provides up to 100 mm of field-adjustable stroke reduction. With a 63 mm bore, it delivers 1559 N of push force at 0.5 MPa and 2805 N at the maximum operating pressure of 0.9 MPa, making it a robust actuator for mid-range industrial tasks. The 20 mm diameter piston rod and 28 mm air cushion length ensure smooth deceleration, while the PT1/4 port and M16x1.5 rod thread offer straightforward pneumatic connections.
The integrated magnet (suffix -S) allows direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors along the barrel for precise, non-contact position sensing. This model's 250 mm nominal stroke is well within the 1500 mm maximum standard stroke for the 63 bore, and the 100 mm adjustment range is ideal for commissioning fine-tuning, format changeovers, or compensating for tooling wear without replacing the cylinder. The body length A(SCJ) is 197 mm, providing a compact footprint for its stroke class.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X250-100S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 250 mm |
| Stroke adjustment | Up to 100 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. |
| ×250 | Nominal (maximum) stroke length in mm. |
| -100 | 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 100 mm adjustment screw lets technicians dial in the exact stroke end position during machine setup, eliminating the need for shims or external hard stops and drastically reducing commissioning time.
On packaging or assembly lines, operators can quickly adjust the cylinder stroke to accommodate different product sizes or pallet patterns without swapping the actuator, minimizing downtime between batches.
In pressing or clamping applications, the adjustable stroke can be periodically shortened to compensate for the gradual wear of tooling surfaces, maintaining consistent clamping force and process quality.
Choose the SCJ63X250-100 when you need a 63 mm bore cylinder with a 250 mm maximum stroke that can be precisely shortened by up to 100 mm on the machine. If your force requirement is lower, stepping down to a 50 mm bore (982 N push at 0.5 MPa) saves space and air consumption; for higher force, the 80 mm bore delivers 2513 N push. This adjustable-stroke model is the correct choice over a fixed-stroke SC when the exact end position must be dialed in during setup or changed for different product runs. For a direct replacement, match an SCJ63 cylinder with a 250 mm nominal stroke, 100 mm adjust range, PT1/4 ports, basic mounting, and the -S magnet option. At this 250 mm stroke, ensure the rod is not subjected to significant side loads; if lateral force is present, use an external guide rail or switch to a guided cylinder to prevent rod bending and seal wear.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N. At the maximum operating pressure of 0.9 MPa, the push force increases to 2805 N. The pull force is lower because the rod reduces the effective piston area on the return stroke.
A rear-cap adjusting screw lets you shorten the stroke end by up to 100 mm. This is ideal for applications where the exact end position needs to be fine-tuned on the machine, such as during commissioning or for different product setups. Choose a fixed-stroke SC cylinder if your stroke length is permanently fixed and you want a simpler, slightly more compact actuator.
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