The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X80-40 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 mm range without swapping the cylinder. Ø63mm bore, 80mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X80-40 is a double-acting, single-rod pneumatic cylinder that puts fine stroke-end adjustment directly on the machine. Its rear-cap screw lets you shorten the effective stroke by up to 40 mm without removing the cylinder, making it a practical choice for commissioning trials or format changeovers where the exact stop position is dialled in on the fly. With a 20 mm piston rod and a 28 mm air cushion, it delivers controlled deceleration at both ends of the 80 mm nominal stroke.
At 0.5 MPa air pressure, this 63 mm bore cylinder generates a push force of 1559 N and a pull force of 1402 N, stepping up to 2805 N push at the maximum operating pressure of 0.9 MPa. The PT1/4 port and M16x1.5 rod thread keep connections straightforward, while the adjustable-stroke design eliminates the need for external hard stops. The body length A(SCJ) is 197 mm, slightly longer than the fixed-stroke version to house the adjustment mechanism.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X80-40 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 80 mm |
| Stroke adjustment | Up to 40 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. |
| ×80 | Nominal (maximum) stroke length in mm. |
| -40 | 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.
Dial in the exact end-stop position during new machine setup without swapping cylinders or machining hard stops. The 40 mm adjustment band covers typical bracket and tooling tolerance stack-ups.
Quickly adapt the stroke for different product sizes on a packaging or assembly line. Operators adjust the rear screw to switch between box heights or component lengths in seconds.
Take up mechanical play or seal compression over time in clamping and pressing fixtures. A simple turn of the screw restores the precise clamping position without disassembly.
Choose the SCJ63 when the 50 mm bore's 982 N push at 0.5 MPa is marginal for your load, but the 80 mm bore's 2513 N is oversized and heavier than needed. This 63 mm frame hits a practical mid-range force class for clamping, pressing, and positioning tasks. If your application never requires stroke length changes, the fixed-stroke SC63 is a simpler, lower-cost alternative. For a direct replacement, match the 63 mm bore, 80 mm nominal stroke, 40 mm adjust range, PT thread, and basic mounting; add the -S suffix if a magnet is needed for sensors.
Adjustable-stroke checklist
At 0.5 MPa, it provides 1559 N pushing force and 1402 N pulling force. The maximum push force at the 0.9 MPa operating limit is 2805 N. Pull force is lower because the rod reduces the effective piston area on the return stroke.
Yes, if you need the ability to fine-tune the stroke end position. The SCJ63X80-40 matches the SC63's 80 mm nominal stroke but adds a 40 mm rear adjustment range. Ensure your mounting and porting (PT1/4) are compatible, and note the body is slightly longer to house the screw mechanism.
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