The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X140-75SLB is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 75 mm range without swapping the cylinder. Ø63mm bore, 140mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X140-75S is a 63 mm bore double-acting single-rod cylinder whose rear-cap adjusting screw lets you shorten the stroke end by up to 75 mm without replacing the unit. With a 20 mm rod and PT1/4 ports, it delivers 1559 N of push force at 0.5 MPa and up to 2805 N at 0.9 MPa, suiting medium-force positioning tasks where the stroke must be dialled in precisely.
This model includes a built-in magnet for CMSG/DMSG/EMSG sensors and an LB foot mount (order F-SC63LB) for rigid surface mounting. The 28 mm air cushion decelerates the piston smoothly, and the 197 mm body length A(SCJ) keeps the package compact for its force class.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X140-75SLB |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 140 mm |
| Stroke adjustment | Up to 75 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. |
| ×140 | Nominal (maximum) stroke length in mm. |
| -75 | 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 end position during machine commissioning without swapping cylinders. The 75 mm adjustment range lets technicians dial in the exact stroke needed for a new fixture or tool.
On packaging or assembly lines, quickly adjust the stroke end to accommodate different product sizes or formats. The rear screw makes format changeovers fast and repeatable.
Take up mechanical wear in grippers, clamps, or stops over time. The adjustable stroke end compensates for pad wear or tooling drift without disassembling the actuator.
Choose the SCJ63 when you need field-adjustable stroke in the 63 mm bore class; its 1559 N push at 0.5 MPa handles most clamping and pressing tasks. If you need more force, step up to the 80 mm bore (2513 N push at 0.5 MPa); for lighter, faster cycling, the 50 mm bore (982 N) may suffice. If your application never requires stroke adjustment, the fixed-stroke SC63 is a simpler, lower-cost alternative.
For replacement, match an SCJ63 with 140 mm nominal stroke, 75 mm adjust range, PT ports, LB foot mount, and magnet (-S suffix). At 140 mm stroke, rod bending is not a primary concern, but if side loads are present, add an external guide rail or consider a guided cylinder.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 1559 N and pull force is 1402 N. At the maximum operating pressure of 1.0 MPa, push reaches 3118 N and pull 2804 N. The single-rod design means push force always exceeds pull force.
Yes, if you need field-adjustable stroke. Match the 63 mm bore, 140 mm nominal stroke, PT1/4 ports, and LB foot mount. The SCJ adds a rear adjusting screw that shortens the stroke end by up to 75 mm, so ensure you have clearance for the slightly longer body (197 mm A dimension).
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.