The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X90-75S 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.
This AirTAC SCJ63X90-75S is a double-acting, single-rod cylinder featuring a rear-cap adjusting screw that provides a 75 mm field-adjustable stroke-end range, allowing precise end-position tuning without replacing the cylinder. With a 63 mm bore, it delivers a push force of 1559 N at 0.5 MPa, making it a powerful and adaptable solution for applications requiring on-machine fine-tuning.
The cylinder uses a 20 mm diameter piston rod with an M16x1.5 thread and PT1/4 ports. Its integrated air cushion, with a 28 mm cushion length, ensures smooth deceleration. The built-in magnet (denoted by the 'S' suffix) enables direct mounting of CMSG/DMSG/EMSG sensors for reliable, non-contact position feedback.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X90-75S |
|---|---|
| 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.
Fine-tune the end-of-stroke position during machine commissioning to perfectly align with mating parts, eliminating the need for shims or custom end stops.
Quickly adjust the stroke length for different product sizes on a packaging line, reducing changeover time between batches without swapping out the cylinder.
Periodically adjust the stroke end to compensate for wear on gripper pads or tooling, maintaining consistent clamping force and product handling over the machine's life.
Select the SCJ63X90-75S when you need the force of a 63 mm bore cylinder (1559 N push at 0.5 MPa) but require the stroke end position to be variable up to 75 mm. If your force requirements are lower, stepping down to a 40 mm bore (628 N push at 0.5 MPa) can reduce size and air consumption. For applications needing a higher force, the 80 mm bore provides 2513 N of push force.
This adjustable-stroke model is ideal for commissioning and format changes. If your application requires a fixed, non-adjustable stroke, the standard SC63 series is a more economical choice. For a direct replacement, ensure the new cylinder matches the 63 mm bore, 90 mm nominal stroke, 75 mm adjustment range, PT port thread, basic mounting, and built-in magnet. For a pivoting motion, consider the TC center trunnion mounting option.
Adjustable-stroke checklist
At a standard operating pressure of 0.5 MPa, this cylinder provides a push force of 1559 N and a pull force of 1402 N. The maximum push force at 0.9 MPa is 2805 N. The pull force is lower due to the area of the 20 mm piston rod.
Yes, you can replace a fixed-stroke SC63 with this SCJ63X90-75S if you need the ability to adjust the stroke end. The mounting dimensions and port sizes are identical. Ensure you match the nominal stroke, port thread (PT), and order the model with the built-in magnet (S) if your application uses sensors.
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