The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X500-50 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, 500mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X500-50 is a double-acting, single-rod pneumatic cylinder with a 63 mm bore and a nominal 500 mm stroke, featuring a rear-cap adjusting screw that provides up to 50 mm of stroke-end reduction. This allows fine-tuning of the piston stop position on the machine without changing the cylinder or adding external hard stops. The 20 mm diameter piston rod and PT1/4 ports deliver a push force of 1559 N and a pull force of 1402 N at 0.5 MPa, making it suitable for medium-force applications requiring precise end-position adjustment.
The cylinder body length A is 197 mm plus the 500 mm stroke, and it includes an adjustable air cushion with a 28 mm cushion length to decelerate the piston smoothly. The SCJ63X500-50 is part of the AirTAC SCJ tie-rod series, built for reliable operation on 40 µm filtered air at pressures from 0.15 to 1.0 MPa. The adjusting screw sets the stroke end only; it is not a force or speed control device.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X500-50 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 500 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. |
| ×500 | 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 setup without swapping cylinders or machining custom stops. The 50 mm range allows quick optimization of the stroke for new tooling.
Adjust the stroke end to accommodate different product sizes on a packaging or material-handling line. Operators can dial in a new position in seconds using the rear screw.
Take up mechanical play or tooling wear over time by advancing the stroke end. This keeps the actuator working at peak precision without replacing components.
Choose the SCJ63X500-50 when you need a 500 mm stroke with the ability to shorten the end position by up to 50 mm in the field, such as for commissioning trials or format changeovers. If your application requires a fixed, non-adjustable stroke, the standard SC63X500 is a direct alternative with the same force output. For a higher force in the same adjustable format, step up to the SCJ80 bore, which provides 2513 N of push force at 0.5 MPa. For a lower force, the SCJ50 bore offers 982 N.
At a 500 mm stroke, be mindful of side loading on the 20 mm rod. If the load is not guided and applies a radial force, use an external guide rail or consider a guided cylinder to prevent rod bending and premature seal wear. For direct replacement, match an SCJ63 cylinder with a 500 mm nominal stroke, a 50 mm adjust range, PT ports, and the same basic mounting configuration.
Adjustable-stroke checklist
At the standard operating pressure of 0.5 MPa, the cylinder produces a push force of 1559 N and a pull force of 1402 N. The maximum push force at the 0.9 MPa operating limit is 2805 N.
Yes, if you no longer need the adjustable stroke feature, an SC63X500 fixed-stroke cylinder with the same bore, stroke, PT ports, and basic mounting is a direct dimensional and performance replacement. Ensure the mounting accessories match the SCJ subset (no FB or CA/CB).
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