The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X500-50S 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 SCJ63X500-50S delivers a robust 1559 N of push force at 0.5 MPa, making it a strong contender for mid-range automation tasks that demand a long 500 mm working stroke. Its single-rod, double-acting design is enhanced by a rear-cap adjusting screw, providing a generous 50 mm of field-adjustable stroke-end reduction for fine-tuning position without swapping the cylinder.
This model features a built-in magnet, allowing direct mounting of CMSG/DMSG/EMSG sensors for precise end-of-stroke detection. The 20 mm rod and PT1/4 ports handle flow efficiently, while the 28 mm air cushion decelerates the piston smoothly. With a body length A of 197 mm, it fits neatly into tie-rod mounting setups.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X500-50S |
|---|---|
| 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.
The 50 mm adjustable stroke lets commissioning engineers dial in the exact end-stop position after installation, compensating for stack-up tolerances in welded frames or assembled tooling without needing to re-machine mounting brackets.
On a packaging line, quickly adjust the push stroke for different box sizes. The rear screw provides a repeatable mechanical stop that is faster to change than reprogramming a servo axis for simple pusher or diverter functions.
In a woodworking or metalworking clamp, the 50 mm range allows operators to fine-tune the clamping depth to accommodate varying material thicknesses or to take up wear on clamp pads over time, ensuring consistent holding force.
Choose the SCJ63X500-50S when you need a 500 mm nominal stroke with the ability to dial back the end position by up to 50 mm on the machine. If your force requirement is lower, the SCJ50 series offers 982 N of push at 0.5 MPa; for a step up in power, the SCJ80 provides 2513 N. This adjustable-stroke unit is the right pick over a fixed-stroke SC when commissioning involves trial-and-error positioning or format changeovers.
For a direct replacement, match the 63 mm bore, 500 mm stroke, 50 mm adjust range, PT port thread, and the built-in magnet (-S). At this 500 mm stroke length, be mindful of side-loading on the 20 mm rod. If the application involves significant lateral force, consider pairing the cylinder with an external guide rail or switching to a guided cylinder to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
The push force is 1559 N at 0.5 MPa and 2805 N at the maximum operating pressure of 0.9 MPa. The pull force is slightly lower at 1402 N at 0.5 MPa due to the area of the 20 mm piston rod. The 50 mm adjust range does not change the cylinder's force output.
Yes, if you need the 50 mm field-adjustment feature. The SCJ63X500-50S shares the same bore, 500 mm nominal stroke, and PT1/4 ports as a fixed-stroke SC63X500. Ensure your mounting is compatible with the SCJ's slightly longer body length A of 197 mm and that you order the -S magnet option if your existing setup uses sensors.
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