The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X200-20S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 mm range without swapping the cylinder. Ø63mm bore, 200mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X200-20S is a double-acting, single-rod pneumatic cylinder that puts field-adjustable stroke control directly on the machine. With a 63 mm bore and a nominal 200 mm stroke, its rear-cap adjusting screw lets you shorten the stroke end by up to 20 mm—ideal for commissioning trials, format changeovers, or taking up wear without swapping the cylinder. The built-in magnet (-S suffix) allows CMSG/DMSG/EMSG sensors to clamp directly onto the tie-rod barrel for reliable end-of-stroke detection.
At 0.5 MPa, this cylinder delivers 1559 N of push force and 1402 N on the pull stroke, backed by a 28 mm air cushion at each end for smooth deceleration. The 20 mm hard-chrome piston rod uses an M16x1.5 thread, and the PT1/4 ports keep plumbing simple. Its tie-rod construction means it is not an ISO 15552 profile cylinder; for dimensional interchange, match another AirTAC SCJ of the same bore, stroke, and adjust range.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X200-20S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 200 mm |
| Stroke adjustment | Up to 20 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. |
| -20 | 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 without draining the air system. The 20 mm adjustment range lets technicians dial in the exact stopping point for a new tool or fixture.
Quickly adapt a packaging or assembly line to a new product size. The rear screw adjusts the stroke end for different box heights or part depths, reducing changeover time versus swapping fixed-stroke cylinders.
In high-cycle clamping or pressing applications, use the adjusting screw to take up mechanical wear on tooling or seals over time, maintaining consistent clamping force without replacing the actuator.
Choose the SCJ63X200-20S when you need to fine-tune the stroke end position on a 63 mm bore platform without adding external hard stops. If your force requirement is lower, the SCJ50 series provides 982 N push at 0.5 MPa; for more force, the SCJ80 steps up to 2513 N. Because this is a single-rod cylinder, always verify that the 1402 N pull force is adequate for your retraction load. For a fixed-stroke application where the adjust screw is not needed, the standard SC63X200 is a direct alternative. To replace this unit, match the bore, 200 mm nominal stroke, 20 mm adjustment range, PT ports, basic mounting, and the magnet option. For strokes of 200 mm or more, ensure the rod is guided externally if significant side loads are present, or consider a guided cylinder to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
At the standard operating pressure of 0.5 MPa, this 63 mm bore cylinder generates 1559 N of push force and 1402 N of pull force. At its maximum operating pressure of 1.0 MPa, the push force reaches 2805 N. The adjustable stroke screw does not alter these force values.
A rear-cap screw mechanically limits the piston's stroke end by up to 20 mm, providing field-adjustable positioning. Choose the SCJ when you need to fine-tune the stroke on the machine for setup, changeover, or wear compensation. If your stroke length is fixed and will never need adjustment, the standard SC series is the simpler, more cost-effective choice.
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