The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X50-50SH is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø63mm bore, 50mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X50-50SH is a double-acting, single-rod pneumatic cylinder with a 63 mm bore and a 50 mm nominal stroke, featuring a rear-cap adjusting screw that provides a 50 mm field-adjustable range. This allows precise, tool-free setting of the stroke end position during commissioning or changeovers. It delivers a push force of 1559 N at 0.5 MPa and a pull force of 1402 N, using a 20 mm diameter piston rod with an M16x1.5 thread.
This model is built with Viton (FKM) seals, extending its operating temperature range from 0 to +150 °C, making it suitable for hot or aggressive environments where standard TPU seals would degrade. A built-in magnet allows for direct mounting of CMSG/DMSG/EMSG sensors on the tie-rod barrel for reliable end-of-stroke detection. The cylinder body length A is 197 mm, and it features an adjustable air cushion of 28 mm for smooth deceleration.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X50-50SH |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 50 mm |
| Stroke adjustment | Up to 50 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. |
| ×50 | Nominal (maximum) stroke length in mm. |
| -50 | 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 stop position during initial machine setup without remounting the cylinder, using the 50 mm adjustment range to dial in the exact stroke required for a new tooling fixture.
Operate reliably in ovens, autoclaves, or near heat sources up to 150°C. The Viton seals maintain integrity in hot environments where standard cylinders would fail, ideal for textile or food processing equipment.
In high-cycle clamping or pressing operations, the adjustable stroke can be periodically tweaked to compensate for mechanical wear on tooling or workpieces, maintaining consistent clamping force and product quality over time.
Choose the SCJ63X50-50SH when you need a robust 63 mm bore cylinder with the flexibility to fine-tune its stroke end by up to 50 mm on the machine. If your force requirement is lower, stepping down to a 50 mm bore (982 N push at 0.5 MPa) can reduce size and air consumption. For applications needing a fixed, non-adjustable stroke, the standard SC63X50 is a more economical choice. This cylinder is a direct replacement for another AirTAC SCJ63X50-50SH with a magnet, Viton seals, and PT ports.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, the cylinder provides a push force of 1559 N and a pull force of 1402 N. The maximum push force at the 1.0 MPa operating limit is 2805 N. The pull force is lower due to the area of the 20 mm piston rod.
A screw mechanism in the rear cap allows you to shorten the stroke end by up to 50 mm. The 50 mm in the model code is the nominal maximum stroke. Turning the screw sets a mechanical stop for the piston, letting you field-adjust the stroke without changing the cylinder or adding external hard stops.
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