The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X270-100S 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, 270mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X270-100 is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, letting you fine-tune the 270 mm nominal stroke by up to 100 mm using the rear-cap screw. At 0.5 MPa, it delivers 1559 N of push force and 1402 N on the pull stroke, making it a strong mid-bore actuator for tasks that need precise end-position dialling without swapping the cylinder.
This model includes a built-in magnet (-S suffix), so CMSG, DMSG, or EMSG reed and solid-state sensors clamp directly onto the tie-rod barrel for reliable end-of-stroke detection. The 20 mm piston rod, PT1/4 ports, and 28 mm air cushion work together to handle dynamic loads smoothly, while the 197 mm body length keeps the package compact for the 63 mm bore class.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X270-100S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 270 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. |
| ×270 | 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.
Dial in the exact stroke end position during machine commissioning without cutting guide rails or adding external hard stops. The 100 mm adjustment screw lets technicians fine-tune the actuator throw on the fly.
In clamping or pressing fixtures, use the rear adjuster to take up pad wear or material thickness variation over thousands of cycles, maintaining consistent clamp force without reprogramming the PLC.
On packaging or sorting lines, quickly adjust the pusher stroke for different box sizes or product widths. The built-in magnet provides sensor feedback at the new stroke end without moving switch brackets.
Choose the SCJ63 when you need to commission a stroke end precisely or accommodate tooling wear over time—the 100 mm adjustment range is the largest offered for this bore. If 1559 N of push force at 0.5 MPa is more than your application requires, stepping down to the 40 mm bore (628 N push) saves space and air consumption; for heavier work, the 80 mm bore provides 2513 N. For a fixed, non-adjustable stroke, the standard SC63 is a simpler alternative.
At a 270 mm stroke, rod deflection under side load becomes a design consideration. If the load is not guided externally, add an external guide rail or switch to a guided cylinder to protect the rod bearing and seal. For direct replacement, match the SCJ63 bore, 270 mm nominal stroke, 100 mm adjust range, PT port thread, and the built-in magnet option.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N. The maximum operating push force at 0.9 MPa reaches 2805 N. Because it is a single-rod cylinder, the push force is always higher than the pull force due to the rod area on the return side.
Yes, this is a direct replacement for any AirTAC SCJ63 with a 270 mm nominal stroke, 100 mm adjust range, PT ports, and a built-in magnet. Verify that your mounting style (basic, FA, LB, or TC) and seal material match your original unit. The SCJ uses a tie-rod construction, so it is not dimensionally interchangeable with ISO 15552 profile cylinders.
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