The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X55-50 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, 55mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X55-50 is a double-acting, single-rod pneumatic cylinder with a 63 mm bore and a nominal 55 mm stroke, featuring a rear-cap adjusting screw that provides a 50 mm field-adjustable stroke-end range. This allows the effective stroke to be fine-tuned without removing the cylinder, making it ideal for commissioning and format changeovers. The cylinder delivers 1559 N of push force at 0.5 MPa, uses a 20 mm diameter piston rod, and has a 28 mm air cushion for smooth deceleration.
Built on a robust tie-rod construction, the SCJ63X55-50 operates on filtered air from 0.15 to 1.0 MPa and has a PT1/4 port. Its body length A(SCJ) is 197 mm, and it is part of the standard stroke range for this bore, which extends up to 1500 mm. This model is configured with a basic mount, TPU seals, and standard PT threads, ready for direct integration into custom machine builds.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X55-50 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 55 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. |
| ×55 | 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.
Fine-tune the end-stop position during initial machine commissioning to perfectly align with tooling or fixtures, eliminating the need for shims or external hard stops.
Quickly adjust the stroke for different product sizes on a packaging line. The 50 mm range allows operators to switch formats without swapping the cylinder.
Compensate for mechanical wear in linkages or gripper pads over time. The rear screw can be advanced to maintain precise contact without replacing components.
Select the SCJ63X55-50 when you need to precisely set a stroke end position within a 50 mm window during setup. For applications requiring a higher force output, stepping up to an 80 mm bore provides 2513 N of push force at 0.5 MPa. If the stroke is fixed and never needs adjustment, a standard SC63X55 cylinder offers a more economical solution without the rear screw mechanism. A direct replacement must match the 63 mm bore, 55 mm nominal stroke, 50 mm adjust range, PT1/4 ports, and basic mounting style.
Adjustable-stroke checklist
At 0.5 MPa, the cylinder generates 1559 N of push force and 1402 N of pull force. The push force is higher because the single piston rod reduces the effective area on the return stroke.
Yes, the SCJ63X55-50 is dimensionally compatible with the SC series for the same bore and stroke, but the body is slightly longer to accommodate the rear adjusting screw. Ensure the 50 mm adjustment range does not interfere with your machine's envelope.
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