The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X200-40 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 mm range without swapping the cylinder. Ø63mm bore, 200mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X200-40 is a double-acting, single-rod pneumatic cylinder that integrates a rear-cap adjusting screw, giving you up to 40 mm of field-adjustable stroke-end control. With a 63 mm bore and 20 mm piston rod, it delivers 1559 N of push force at 0.5 MPa (2805 N at the 0.9 MPa maximum operating pressure), making it a solid mid-range actuator for tasks that need frequent end-stop tuning.
This tie-rod cylinder uses a PT1/4 port and an M16x1.5 rod thread, with a 28 mm air cushion at each end for smooth deceleration. The body length A is 197 mm, and the nominal 200 mm stroke is well within the 1500 mm maximum standard stroke for this bore. The adjustable screw only shifts the stroke end position—it does not alter the cylinder's force rating or speed capability.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X200-40 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 200 mm |
| Stroke adjustment | Up to 40 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. |
| -40 | 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.
On a packaging machine that runs multiple box sizes, the 40 mm adjustment range lets operators dial in the correct push-off stroke for each format without mechanical rework or swapping cylinders.
In a woodworking clamp that cycles thousands of times, the stroke-end screw can be advanced slightly over the tool's life to compensate for pad wear, maintaining consistent clamping pressure without replacing the actuator.
During machine build and runoff, the SCJ63X200-40 allows engineers to precisely set the end-of-stroke position for a transfer arm, eliminating the need to fabricate and shim hard stops.
Step up to an 80 mm bore (2513 N push at 0.5 MPa) if the 1559 N output of the SCJ63 is marginal for your load. For applications where the stroke is fixed after commissioning, a standard SC63X200 cylinder removes the adjustment mechanism and slightly shortens the overall length. The direct replacement match is another SCJ63 with a 200 mm nominal stroke and a 40 mm adjustment range, using PT ports and basic mounting.
At 200 mm of stroke, rod buckling is not a primary concern for axial loads, but if the application imposes a significant side load, add an external guide rail or switch to a guided cylinder to protect the rod bearing and seal.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N (the pull force is lower because the 20 mm rod reduces the piston area on the return side). At the maximum operating pressure of 0.9 MPa, the push force reaches 2805 N.
Yes, the mounting footprint and port locations are the same, but the SCJ body is slightly longer to house the rear adjustment screw. Ensure the extra length fits your machine envelope. The replacement must match the 200 mm nominal stroke, 40 mm adjust range, PT1/4 ports, and basic mounting style.
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