The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X550-100 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, 550mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X550-100 is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke, built around a 63 mm bore and a 20 mm diameter piston rod. Its rear-cap adjusting screw provides a 100 mm stroke-end reduction range, letting you fine-tune the final position from 550 mm down to 450 mm without removing the cylinder. The PT1/4 ports and 28 mm air cushion deliver controlled deceleration, and at the standard 0.7 MPa operating pressure, it generates 2182 N of push force.
This tie-rod cylinder is engineered for applications where commissioning, format changes, or mechanical wear require regular end-stop adjustments. The body length A(SCJ) is 197 mm, and the maximum standard stroke for this bore is 1500 mm. It uses a TPU seal for a standard temperature range of -20 to +70 °C and comes in a basic mounting configuration, ready to accept the SCJ-specific accessory set.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X550-100 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 550 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. |
| ×550 | 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.
On a packaging line handling different box sizes, the 100 mm adjust range allows operators to quickly dial in the correct pusher stroke for each product run without mechanical changes.
In a high-cycle welding fixture, the adjustable stroke end can be periodically tweaked to compensate for clamp pad wear, maintaining consistent clamping force without replacing parts.
During new machine commissioning, engineers can use the rear screw to experimentally find the optimal actuator end-stop, then lock it down once the process is validated.
Choose the 63 mm bore when the 1559 N push force at 0.5 MPa is the right match for your load. If you need more force, stepping up to the 80 mm bore provides 2513 N at the same pressure. For applications that don't require stroke-end adjustment, the fixed-stroke SC63 series offers a simpler, more compact alternative. A direct replacement must match the 63 mm bore, 550 mm nominal stroke, 100 mm adjust range, PT port thread, and basic mounting.
With a 550 mm stroke, the piston rod is fully extended, making it susceptible to side-loading and bending. To protect the rod and bearing, use an external guide rail or consider a guided cylinder for this stroke length. The SCJ mounting system supports FA front flange, LB foot, or TC centre trunnion accessories to secure the cylinder in your application.
Adjustable-stroke checklist
The push force is 1559 N at 0.5 MPa, 2182 N at 0.7 MPa, and 2805 N at the maximum operating pressure of 0.9 MPa. The pull force is slightly lower due to the 20 mm rod area, providing 1402 N at 0.5 MPa.
You can, provided the mounting and porting match. The SCJ63X550-100 has a body that is slightly longer than a fixed-stroke SC63 to house the adjusting screw. Ensure you have the extra clearance and that your application benefits from the 100 mm stroke-end adjustability.
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