The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X20-10S 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, 20mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The AirTAC SCJ63X20-10S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end. A rear-cap adjusting screw provides up to 10 mm of fine-tuning for the stroke end position, making it ideal for commissioning, wear take-up, and format changeovers without swapping the cylinder. The 63 mm bore delivers 1559 N of push force at 0.5 MPa, driven by a 20 mm diameter piston rod.
This model includes a built-in magnet (-S suffix), allowing easy mounting of CMSG/DMSG/EMSG reed or solid-state sensors directly onto the tie-rod barrel for end-of-stroke detection. The cylinder features an adjustable air cushion (28 mm length) for smooth deceleration and uses PT1/4 ports with an M16x1.5 rod thread. Its body length A(SCJ) is 197 mm.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X20-10S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 20 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. |
| ×20 | 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.
The 10 mm rear adjustment screw allows operators to precisely dial in the final position of a tooling plate or stop, compensating for minor assembly variations during machine commissioning.
With the built-in magnet (-S), this cylinder simplifies the setup of pneumatic sequencing. The adjustable stroke lets you perfectly align the piston's end position with a CMSG sensor's optimal sensing point.
In clamping or pressing applications, the stroke can be incrementally extended over time to compensate for wear on contact pads or tooling, maintaining consistent clamping force without mechanical shims.
Choose the SCJ63X20-10S when you need a compact 20 mm nominal stroke with the ability to dial in the exact end position within a 10 mm range. If your force requirement is lower, the SCJ50 series offers 982 N of push force from a 50 mm bore. For applications needing a longer fixed stroke without adjustment, the standard SC63 cylinder is a more economical choice. A direct replacement must match the 63 mm bore, 20 mm nominal stroke, 10 mm adjust range, PT port thread, and the integrated magnet for sensor compatibility.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N. Because it is a single-rod cylinder, the push force is higher than the pull force. The maximum push force at the 0.9 MPa operating limit is 2805 N.
No. The adjusting screw only sets the stroke end position, and the air cushion only decelerates the piston. Neither feature acts as a mechanical lock or brake. If a load must be held without live air pressure, you will need an external rod brake or a pilot-operated check valve.
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