The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X250-100 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 field-adjustable stroke end, allowing you to fine-tune the extension stop by up to 100 mm without removing the cylinder from the machine. With a 63 mm bore and 20 mm rod, it delivers 1559 N of push force and 1402 N of pull force at 0.5 MPa, rising to 2805 N push at 0.9 MPa, making it a robust choice for mid-range industrial positioning tasks.
Its rear-cap adjusting screw sets the stroke end position within the 100 mm range, while the nominal 250 mm stroke provides the maximum travel. The cylinder features a 28 mm air cushion for smooth deceleration, PT1/4 ports, and an M16x1.5 rod thread. The body length A(SCJ) is 197 mm, slightly longer than the fixed-stroke SC version to accommodate the adjustment mechanism.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X250-100 |
|---|---|
| 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 range lets technicians dial in the exact stroke end during machine commissioning without swapping cylinders or machining hard stops, significantly reducing setup time.
On packaging or assembly lines running multiple product sizes, the rear screw allows operators to quickly re-set the actuator stroke for a new format, minimising downtime between batches.
In clamping or pressing fixtures, the adjustable stroke can be periodically extended to take up mechanical wear on tooling or contact surfaces, maintaining consistent clamping force without replacing parts.
Choose the SCJ63X250-100 when your application requires frequent stroke-end adjustments during commissioning, format changes, or to compensate for tooling wear. If you need more force, step up to the 80 mm bore which provides 2513 N push at 0.5 MPa; for a lighter, more compact solution, the 50 mm bore offers 982 N. If your stroke is fixed and will never need field adjustment, the standard SC63X250 fixed-stroke cylinder is a more economical choice.
For this 250 mm stroke, be mindful of side loads which can cause rod bending; use an external guide or switch to a guided cylinder if the load is not perfectly axial. This model is a direct replacement for any AirTAC SCJ63X250-100 with PT ports and basic mounting. To add position sensing, order the -S magnet variant; for pivoting applications, select the TC centre trunnion mount.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, it generates 1559 N of push force and 1402 N of pull force. The maximum push force at 0.9 MPa is 2805 N. Because it is a single-rod cylinder, the push force is always greater than the pull force due to the rod area on the return side.
Yes, provided the mounting style, port thread (PT), and magnet option match. The SCJ63X250-100 has the same bore, rod diameter, and port size as the SC63, but the body is slightly longer to house the adjusting screw. Ensure you have clearance for the rear adjustment mechanism and confirm that the 250 mm nominal stroke with 100 mm adjustment range covers your required travel.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.