The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X90-75SLB 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, 90mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X90-75SLB is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, allowing operators to fine-tune the piston's stop position within a 75 mm range without dismounting the unit. This 63 mm bore model delivers a substantial 1559 N of push force at 0.5 MPa and 2805 N at the 0.9 MPa maximum operating pressure, making it a robust choice for applications requiring precise end-stop calibration.
This specific configuration includes a built-in magnet (S) for direct mounting of CMSG/DMSG/EMSG sensors and an LB-style axial foot mount (F-SC63LB) for secure surface installation. The 20 mm piston rod features an M16x1.5 male thread, and the cylinder body has a length A of 197 mm, with a 28 mm air cushion to decelerate the load smoothly at the end of its 90 mm nominal stroke.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X90-75SLB |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 90 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. |
| ×90 | 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.
The 75 mm adjusting screw lets technicians quickly dial in the exact stroke end position during initial machine setup, eliminating the need to swap out fixed-stroke cylinders or fabricate external hard stops.
In clamping or pressing fixtures, the adjustable stroke can be periodically shortened to compensate for wear on tooling or workpieces, maintaining consistent contact force without reprogramming the machine.
For packaging lines handling different box sizes, the stroke end can be quickly adjusted to match a new product width, enabling a fast mechanical changeover without complex automation.
Select this SCJ63 model when you need to dial in a stroke end position on the fly, such as during commissioning or for format changeovers, and the 75 mm adjustment range covers your variation. If the 1559 N push force at 0.5 MPa is insufficient, stepping up to the 80 mm bore provides 2513 N of push force; if it exceeds your requirement, the 50 mm bore offers 982 N. For a fixed, non-adjustable stroke, the standard SC63 cylinder is a direct alternative.
This cylinder is a direct replacement for another AirTAC SCJ63 with a 90 mm nominal stroke, a 75 mm adjustment range, PT ports, an LB foot mount, and a magnetic piston. The 90 mm stroke is well within the 1500 mm maximum standard stroke for this bore, so rod bending is not a primary concern here, but always ensure the load is guided if any side forces are present.
Adjustable-stroke checklist
A screw mechanism in the rear cap allows you to shorten the piston's stroke end by up to 75 mm. The 90 mm in the model code is the maximum nominal stroke. Turning the screw changes where the piston stops on the extend stroke, but it does not alter the cylinder's force or speed.
At the standard 0.5 MPa operating pressure, the push force is 1559 N and the pull force is 1402 N. The pull force is lower because the 20 mm piston rod reduces the effective area on the return side. At the maximum 0.9 MPa pressure, the push force reaches 2805 N.
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