The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X200-50 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, 200mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X200-50 delivers a nominal 200 mm stroke with a rear-cap adjusting screw that lets you fine-tune the stroke end by up to 50 mm in the field—no cylinder swap needed for commissioning or format changes. Its 63 mm bore generates 1559 N of push force at 0.5 MPa (2805 N at 0.9 MPa), while the 20 mm piston rod and 28 mm air cushion handle deceleration smoothly.
This is a double-acting, single-rod tie-rod cylinder with PT1/4 ports and a standard TPU seal rated for -20 to +70 °C. The body length A(SCJ) is 197 mm, slightly longer than the fixed-stroke SC of the same bore to house the adjusting mechanism. It accepts the SCJ mounting subset: basic, FA front flange, LB foot, or TC centre trunnion with TCM1 bracket.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X200-50 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 200 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. |
| ×200 | 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.
Adjust the stroke end by up to 50 mm to accommodate different box heights or product sizes on a packaging line without changing the cylinder or adding mechanical stops.
Compensate for jaw or pad wear in a clamping station over time by dialling the rear screw to restore full clamping pressure at the correct end position.
Fine-tune the actuator end-stop during machine commissioning to dial in the exact stroke length needed, then lock the screw—no need to stock multiple fixed-stroke cylinders.
Choose the SCJ63 bore when your application needs push force around 1559 N at 0.5 MPa. If you require more force, step up to the SCJ80 bore (2513 N push at 0.5 MPa); if a smaller envelope is critical, the SCJ50 bore delivers 982 N. The 50 mm adjustable range on this model is ideal for machines that undergo periodic wear take-up or multi-format changeovers without external hard stops.
For a direct replacement, match the SCJ63 bore, 200 mm nominal stroke, -50 adjust range, PT1/4 port thread, and your mounting accessory (basic, FA, LB, or TC). At this 200 mm stroke, rod bending is typically not a concern, but if side loads are present in your application, consider adding an external guide rail or switching to a guided cylinder. When stroke length is fixed and never needs field adjustment, the standard SC63X200 is a simpler, cost-effective alternative.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N (reduced by the 20 mm rod area). At the maximum operating pressure of 0.9 MPa, push force reaches 2805 N. The theoretical maximum at 1.0 MPa is 318 kgf.
Yes, this is a genuine AirTAC SCJ63X200-50 with a 50 mm adjustable stroke range, PT1/4 ports, and basic mounting. For a drop-in replacement, confirm your existing cylinder has the same bore, nominal stroke, -50 adjust range, port thread, and mounting style (basic, FA, LB, or TC).
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