The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X100-50H 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. Ø50mm bore, 100mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ50X100-50H is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, built for hot environments. Its 50 mm bore generates 982 N of push force at 0.5 MPa, while the rear adjusting screw provides up to 50 mm of stroke-end reduction, letting you fine-tune the piston stop without swapping the cylinder.
This variant is fitted with Viton (FKM) seals, extending the operating temperature range to 0–150 °C for reliable performance in high-heat applications. The 20 mm diameter piston rod and 21 mm air cushion ensure smooth deceleration, and the PT1/4 port thread matches standard AirTAC fittings. The body length A(SCJ) is 194 mm.
| Model | Airtac SCJ50 Standard Cylinder SCJ50X100-50H |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 100 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, 21 mm |
| Max stroke | Up to 1200 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 | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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. |
|---|---|
| 50 | Bore size in mm. |
| ×100 | 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.
The 50 mm adjustment range allows engineers to rapidly test and set the optimal stroke end for material handling clamps operating inside ovens or near heat-sealing bars, where the Viton seals handle the sustained 150°C ambient temperature.
Ideal for adjusting the stop position of a pusher on a packaging line that runs hot-fill products. The SCJ50X100-50H lets operators dial in the new stroke for a different box size in seconds without tools, minimizing downtime during product changeovers.
In a laminating press where platens wear over time, the adjustable stroke compensates for the material thickness change. The Viton seals ensure the cylinder body withstands conducted heat from the platens, maintaining a consistent 982 N clamping force.
Choose the SCJ50X100-50H when you need a mid-range force actuator that can be dialed in precisely on the machine. If your load requires more push, step up to the 63 mm bore, which delivers 1559 N at 0.5 MPa; for a lighter, more compact solution, the 40 mm bore provides 628 N. If the stroke never needs adjustment, the fixed-stroke SC50X100 is a simpler, cost-effective alternative.
This cylinder is a direct replacement for another AirTAC SCJ50X100-50H with PT ports, basic mounting, and Viton seals. For strokes of 100 mm, the standard rod bearing handles most axial loads, but if the application introduces significant side force, consider an external guide rail to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 982 N and the pull force is 825 N, due to the 20 mm single rod reducing the piston area on the return stroke. The maximum theoretical push force at 1.0 MPa is 200 kgf. The 50 mm stroke adjustment screw does not alter the force output.
It can physically replace an SC50 of the same bore, but the SCJ body is slightly longer to house the adjustment mechanism. It is a direct functional replacement only if you need the adjustable stroke feature. Ensure your mounting and porting (PT1/4) match, and note this H-suffix model uses Viton seals for high-temperature operation.
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