The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X40-10S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 10 mm range without swapping the cylinder. Ø63mm bore, 40mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X40-10S is a double-acting, single-rod pneumatic cylinder from AirTAC’s adjustable-stroke series, delivering 1559 N of push force at 0.5 MPa. A rear-cap adjusting screw provides up to 10 mm of fine stroke-end control, letting you dial in the exact stopping position without swapping the cylinder. The built-in magnet (suffix -S) allows barrel-mounted CMSG/DMSG/EMSG sensors for reliable end-of-stroke detection.
With a 20 mm piston rod, PT1/4 ports, and a 28 mm air cushion, this 63 mm bore unit handles rapid cycling while decelerating loads smoothly. Its body length A(SCJ) is 197 mm, making it a compact choice for space-constrained setups that still need the force of a mid-bore cylinder. The standard TPU seal works from -20 to +70 °C, and the PT threads ensure straightforward plumbing with common fittings.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X40-10S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 40 mm |
| Stroke adjustment | Up to 10 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. |
| ×40 | Nominal (maximum) stroke length in mm. |
| -10 | 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.
During machine setup, the 10 mm rear screw lets technicians micro-adjust the cylinder’s end stop to align with mating parts, eliminating the need to shim or reposition the entire actuator.
On packaging lines switching between box sizes, the adjustable stroke quickly resets the pusher’s travel to match the new carton width, reducing downtime between batches.
In clamping or pressing fixtures, the stroke-end screw can be advanced slightly over time to compensate for pad wear or material compression, maintaining consistent clamping force without replacing the cylinder.
Choose the SCJ63X40-10S when you need a 63 mm bore’s push force—1559 N at 0.5 MPa—and the ability to tweak the stroke end by up to 10 mm during commissioning or changeovers. If your force requirement drops closer to 982 N, the 50 mm bore SCJ50 series saves space and air consumption; stepping up to the 80 mm bore provides 2513 N for heavier loads. For applications where the stroke must never shift after setting, a fixed-stroke SC cylinder with an external stop may be a simpler, lower-cost alternative.
This model is a direct replacement for an existing AirTAC SCJ63X40-10S with PT ports, basic mounting, and a magnet. When ordering a replacement, match the bore, nominal stroke, 10 mm adjust range, and the -S magnet suffix. If you are adding mounting, the SCJ63 accepts FA front flange, LB foot, or TC centre trunnion kits (e.g., F-SC63TC), but not FB or CA/CB styles.
Adjustable-stroke checklist
A screw in the rear cap limits how far the piston retracts, shortening the effective stroke by up to 10 mm from the nominal 40 mm. It adjusts only the stroke end position—it does not change the cylinder’s force, speed, or the 1559 N push rating at 0.5 MPa.
Yes, it is a form-and-function match for any AirTAC SCJ63 with a 40 mm nominal stroke, 10 mm adjust range, PT ports, and the -S magnet option. Confirm your mounting style—this basic version has no bracket, so reuse your existing FA, LB, or TC mounting kit if needed.
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