The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X200-75 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 SCJ63X200-75 delivers a push force of 1559 N at 0.5 MPa and up to 2805 N at the maximum operating pressure of 0.9 MPa, making it a robust solution for mid-range industrial tasks. Its rear-cap adjusting screw provides a 75 mm stroke-end reduction range, allowing operators to fine-tune the piston stop position on the fly without removing the cylinder from the machine.
This double-acting, single-rod cylinder features a 20 mm diameter piston rod and a PT1/4 port, with an adjustable air cushion that decelerates the load over a 28 mm travel at each end. The tie-rod body construction has an overall length of 197 mm plus the 200 mm nominal stroke, offering a compact yet powerful package for applications needing frequent format changes.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X200-75 |
|---|---|
| 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 adjustable stroke allows engineers to quickly find the optimal end position for a new machine process without fabricating custom stops, slashing setup time during factory acceptance tests.
On a packaging line switching between box sizes, the rear screw can be turned to reposition the pusher stroke end by up to 75 mm, eliminating the need for mechanical stop changes or cylinder swaps.
In clamping or pressing fixtures, the stroke can be incrementally extended over time to compensate for tooling or pad wear, maintaining consistent clamping force without reprogramming the machine controller.
Choose the SCJ63X200-75 when you need to dial in a precise end position during commissioning or product changeovers. If your force requirement is lower, stepping down to the 50 mm bore SCJ series provides 982 N of push at 0.5 MPa; for higher demands, the 80 mm bore delivers 2513 N. This model is a direct replacement for an existing AirTAC SCJ63X200-75 with a PT port and basic mounting.
For this 200 mm stroke, the single-rod design is well-supported by the bore's guide bushings, but if your application introduces significant side loading, consider adding an external guide rail or switching to a guided cylinder to protect the rod and seals from premature wear. If the stroke never needs field adjustment, the fixed-stroke SC63X200 is a simpler and more cost-effective alternative.
Adjustable-stroke checklist
The push force is 1559 N at 0.5 MPa, 2182 N at 0.7 MPa, and 2805 N at 0.9 MPa. The pull force is slightly lower due to the 20 mm rod area, providing 1402 N at 0.5 MPa.
Yes, if you need the ability to adjust the stroke end. The SCJ63X200-75 matches the mounting footprint of an SC63 fixed-stroke cylinder but adds a rear adjusting screw. Ensure your machine has clearance for the slightly longer body length and that the 75 mm adjustment range covers your needs.
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