The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X200-75S 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, 200mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X200-75S is a double-acting, single-rod pneumatic cylinder engineered for applications where the stroke end position must be fine-tuned on the machine. A rear-cap adjusting screw provides up to 75 mm of stroke reduction from the 200 mm nominal maximum, enabling quick commissioning changes without replacing the cylinder or adding external hard stops. The 20 mm piston rod and 28 mm air cushion deliver reliable deceleration for mid-range automation tasks.
At 0.5 MPa, this 63 mm bore unit generates 1559 N of push force and 1402 N on the pull stroke, making it a solid choice for pressing, clamping, and material handling. The integrated magnet (-S suffix) allows direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors along the tie-rod barrel for precise end-of-stroke detection. Its PT1/4 ports and standard TPU seals suit filtered-air systems operating from -20 to +70 °C.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X200-75S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 200 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. |
| ×200 | 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 screw adjustment lets technicians dial in the exact stroke end position during initial machine setup, eliminating the need to stock multiple fixed-stroke cylinders for trial-and-error integration.
Quickly adapt the cylinder's end stop for different product sizes on a packaging or assembly line. The rear screw adjustment is accessible without dismounting the cylinder, minimizing downtime between batches.
In high-cycle clamping fixtures, the adjustable stroke can be periodically shortened to compensate for jaw or pad wear, maintaining consistent clamping force without reprogramming the machine controller.
Choose the SCJ63X200-75S when you need a 63 mm bore's force class (1559 N push at 0.5 MPa) with the ability to dial in the stroke end point during setup or product changeover. If your load requires more force, stepping up to an 80 mm bore provides 2513 N of push; for a lighter, more compact solution, a 50 mm bore delivers 982 N. The adjustable stroke is ideal for commissioning trials, but if your application demands a fixed, repeatable stroke with no field adjustment, a standard SC63X200 fixed-stroke cylinder is a simpler alternative.
This model is a direct replacement for another AirTAC SCJ63X200-75S with PT ports, a basic mount, and a magnet. For strokes of 300 mm or longer, evaluate side-loading on the 20 mm rod; an external guide rail or switching to a guided cylinder assembly will protect the rod bearing and seals from premature wear.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, the cylinder produces 1559 N of push force and 1402 N of pull force. The maximum push force at the 0.9 MPa upper limit is 2805 N. The adjusting screw changes the stroke end position, not the force output.
Yes, if you need field-adjustable stroke end control. The SCJ63X200-75S matches the 63 mm bore and 200 mm maximum stroke of an SC63X200 but adds a 75 mm rear adjustment range. Ensure your mounting (basic in this case), port thread (PT), and sensor requirement (magnet -S) match your existing setup.
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