The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X80-40S 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 SCJ63X80-40S delivers a robust 1559 N of push force at 0.5 MPa from its 63 mm bore, making it a workhorse for applications needing mid-range pneumatic power. Its single 20 mm piston rod provides a solid 1402 N of pull force, and the rear adjusting screw allows you to fine-tune the stroke end by up to 40 mm, a real advantage during commissioning or format changes.
With a 28 mm air cushion at each end, it decelerates loads smoothly, and the integrated magnet lets you mount CMSG/DMSG sensors directly on the tie-rod barrel for reliable end-of-stroke sensing. The body length A is 197 mm, fitting neatly into constrained spaces.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X80-40S |
|---|---|
| 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.
Quickly adjust the end stop by up to 40 mm when a packaging machine switches between box sizes, eliminating manual change parts.
Fine-tune the pressing depth in a gluing or light assembly fixture to accommodate part tolerances without reprogramming.
During machine setup, technicians can iteratively adjust the stroke end to find the perfect actuator throw for a new process.
Choose the SCJ63X80-40S when you need to dial in a precise stroke end without swapping cylinders. If your force needs are lower, the 50 mm bore offers 982 N push; for heavier loads, the 80 mm bore steps up to 2513 N. For a fixed-stroke application, the standard SC series is a simpler alternative. When replacing this unit, match the 63 mm bore, 80 mm nominal stroke, 40 mm adjust range, PT ports, and the built-in magnet. For strokes over 300 mm, consider an external guide to protect the 20 mm rod from side loads.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, it produces 1559 N of push force and 1402 N of pull force. The push force is higher because the single rod reduces the piston area on the return side.
A rear screw sets the stroke end position within a 40 mm range. It is a direct replacement for an SCJ63 with the same stroke and adjust range. To replace a fixed-stroke SC, you must ensure the adjusted length fits your machine's cycle.
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