The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X75-30S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø63mm bore, 75mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The AirTAC SCJ63X75-30S is a double-acting, single-rod pneumatic cylinder that delivers 1559 N of push force at 0.5 MPa, stepping up to 2805 N at the maximum operating pressure of 0.9 MPa. Its key feature is a rear-cap adjusting screw that provides a 30 mm field-adjustable range, allowing you to fine-tune the stroke end position without removing the cylinder from the machine.
This model includes a built-in magnet (-S suffix), enabling direct mounting of CMSG/DMSG/EMSG sensors along the tie-rod barrel for reliable, non-contact position sensing. With a 20 mm piston rod, PT1/4 ports, and a 28 mm air cushion, it is built for precise, repeatable end-stop adjustment in dynamic automation tasks.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X75-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 75 mm |
| Stroke adjustment | Up to 30 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. |
| ×75 | Nominal (maximum) stroke length in mm. |
| -30 | 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 stroke end position during initial machine setup using the 30 mm adjustment screw, eliminating the need for shims or custom hard stops.
Quickly adapt the stroke length for different product sizes on a packaging or sorting line, reducing downtime between batches without swapping the cylinder.
Adjust the stroke end to compensate for mechanical wear in grippers or tooling over time, maintaining consistent part contact without reprogramming the controller.
Choose the SCJ63 bore when your application requires a push force between the 1559 N of this 63 mm cylinder and the 982 N of the smaller SCJ50. If you need more force, the SCJ80 bore provides 2513 N of push at the same 0.5 MPa pressure. This adjustable-stroke model is ideal when you anticipate needing to change the stroke end position during commissioning or for different product runs; for a fixed, non-adjustable stroke, the standard SC63 cylinder is a simpler, more cost-effective alternative. A direct replacement must match the 63 mm bore, 75 mm nominal stroke, 30 mm adjust range, PT port thread, and the built-in magnet.
Adjustable-stroke checklist
A screw in the rear cap acts as an internal, adjustable end-stop for the piston. Turning the screw changes the retracted position of the piston rod, allowing you to shorten the stroke by up to 30 mm from its nominal 75 mm maximum. It sets the stroke end position and does not adjust the cylinder's speed or force.
At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N. The pull force is lower because the rod reduces the effective piston area on the return stroke. At the maximum operating pressure of 0.9 MPa, the push force increases to 2805 N.
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