The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X100-75S 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, 100mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X100-75S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, letting you fine-tune the stop position by up to 75 mm using the rear-cap screw. With a 63 mm bore, it delivers 1559 N of push force at 0.5 MPa and 2805 N at 0.9 MPa, making it a strong mid-range actuator for tasks that need precise mechanical setup.
This model includes a built-in magnet (-S suffix), so you can clamp CMSG, DMSG, or EMSG reed or solid-state sensors directly onto the tie-rod barrel for reliable end-of-stroke detection. It uses a 20 mm piston rod with M16x1.5 threads, PT1/4 ports, and a 28 mm air cushion to decelerate the piston quietly. The body length A(SCJ) is 197 mm, slightly longer than a fixed-stroke SC of the same bore to accommodate the adjusting mechanism.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X100-75S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 100 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. |
| ×100 | 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 actuator end-stop during machine commissioning without changing hard stops or cylinder mounts. The 75 mm screw adjustment lets technicians quickly dial in the exact stroke needed for a new tooling setup.
On packaging or labelling lines, adjust the stroke end to accommodate different product sizes. The SCJ63X100-75S eliminates the need to stock multiple fixed-stroke cylinders for short-run format changes.
Compensate for mechanical wear in clamping or pressing fixtures over time. The adjustable rear screw lets operators restore the precise end position without disassembling the linkage, reducing downtime.
Choose the SCJ63 when your application needs around 1559 N of push at standard shop air and you value the ability to dial in the stroke end during commissioning or changeovers. If you need more force, the SCJ80 delivers 2513 N push at 0.5 MPa; for a lighter, more compact solution, the SCJ50 provides 982 N. The -75 adjustment range is ideal for setups requiring a broad tuning window without swapping cylinders.
For a direct replacement, match the 63 mm bore, 100 mm nominal stroke, 75 mm adjust range, PT port thread, and the built-in magnet. The SCJ series uses a subset of SC mounting accessories—this basic configuration has no bracket, but you can add an FA front flange (F-SC63FA), LB foot mount (F-SC63LB), or TC centre trunnion (F-SC63TC with TCM1 bracket) later. If your stroke is fixed and never needs field adjustment, the standard SC63X100 is a simpler, slightly shorter alternative.
Adjustable-stroke checklist
Because it is a single-rod cylinder, push and pull forces differ. At 0.5 MPa, push force is 1559 N and pull force is 1402 N. At the maximum operating pressure of 0.9 MPa, push force reaches 2805 N. The rear adjusting screw only changes the stroke end position, not the force output.
Yes, if you need the adjustable-stroke feature. The SCJ63 shares the same mounting footprint and port sizes as the fixed-stroke SC63. Ensure you match the 100 mm nominal stroke and PT1/4 ports. The SCJ body is slightly longer (197 mm) to house the adjusting screw, so verify you have clearance at the rear cap.
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