The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X210-20 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 mm range without swapping the cylinder. Ø63mm bore, 210mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X210-20 delivers a push force of 1559 N at 0.5 MPa, scaling up to 2805 N at the 0.9 MPa maximum operating pressure, making it a capable mid-range actuator. Its rear-cap adjusting screw provides up to 20 mm of stroke-end reduction, allowing you to fine-tune the stopping position in the field without dismounting the cylinder or adding external hard stops.
This double-acting, single-rod cylinder uses a 20 mm diameter piston rod with an M16x1.5 thread and features a 28 mm air cushion for smooth deceleration. The PT1/4 port and tie-rod construction ensure straightforward integration, with a body length of 197 mm providing a compact footprint for the 210 mm nominal stroke.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X210-20 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 210 mm |
| Stroke adjustment | Up to 20 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. |
| ×210 | Nominal (maximum) stroke length in mm. |
| -20 | 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 actuator's end stop during initial machine build-out, dialing in the exact stroke length needed without swapping cylinders or machining custom stops.
Quickly adjust the push stroke for different product sizes on a packaging line, reducing downtime between format changes with a simple screw adjustment.
Take up mechanical play or compensate for tooling wear over time by incrementally adjusting the stroke end, maintaining consistent process quality.
For applications requiring slightly less force, stepping down to the 50 mm bore SCJ50 series reduces push force to 982 N at 0.5 MPa, while moving up to the 80 mm bore provides a substantial jump to 2513 N. If your application does not require field-adjustable stroke end position, the fixed-stroke SC63X210 is a direct dimensional alternative. A direct replacement must match the 63 mm bore, 210 mm nominal stroke, 20 mm adjust range, and PT port thread. For this 210 mm stroke, ensure the rod is adequately supported if significant side loads are present; an external guide or a guided cylinder is recommended to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, it generates 1559 N of push force and 1402 N of pull force. The maximum push force at 0.9 MPa is 2805 N, based on the full 63 mm bore area.
A rear-cap screw allows you to shorten the stroke end by up to 20 mm from the 210 mm nominal maximum. It is a direct functional upgrade for an SC63X210 if you need field adjustability, but the SCJ body is slightly longer to house the mechanism.
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