The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X20-10H is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 10 mm range without swapping the cylinder. Ø50mm bore, 20mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ50X20-10H is a double-acting, single-rod pneumatic cylinder featuring a rear-cap adjusting screw that provides up to 10 mm of field-adjustable stroke-end control. This model is built with a 50 mm bore and a 20 mm rod, delivering a push force of 982 N at 0.5 MPa, making it a compact yet powerful solution for fine-tuning end positions in high-temperature environments.
Equipped with Viton (FKM) seals, this cylinder is rated for operation from 0 to +150 °C, far exceeding the standard -20 to +70 °C range. The 21 mm adjustable air cushion at both ends ensures smooth deceleration, while the PT1/4 port and M16x1.5 rod thread provide standard connectivity for integration into existing systems.
| Model | Airtac SCJ50 Standard Cylinder SCJ50X20-10H |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 20 mm |
| Stroke adjustment | Up to 10 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. |
| ×20 | Nominal (maximum) stroke length in mm. |
| -10 | 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 retract stroke end on a heated packaging sealer. The 10 mm adjustment screw allows operators to compensate for thermal expansion of tooling without replacing the cylinder, while Viton seals withstand the continuous high temperature.
Adjust the extend position of a hot-melt glue dispenser head. The 982 N push force at 0.5 MPa provides ample power for viscous material application, and the screw adjustment enables quick changeovers between different product heights.
Set the precise opening of a diverter gate on a curing oven conveyor. The field-adjustable stroke end allows for fine-tuning the gate angle to handle varying part sizes, with the FKM seals ensuring reliability in the sustained heat.
Choose the SCJ50X20-10H when you need to precisely dial in a short stroke end position in a hot environment without swapping the cylinder. If your force requirements are lower, the 40 mm bore SCJ series offers 628 N of push force at 0.5 MPa; for higher demands, the 63 mm bore steps up to 1559 N. This adjustable-stroke unit is ideal over a fixed-stroke SC when machine commissioning or thermal expansion requires on-the-fly end-point tuning.
For replacement, match this model directly with another SCJ50X20-10H to ensure identical bore, 20 mm nominal stroke, 10 mm adjustment range, PT ports, and Viton seals. If the application involves significant side loads, consider an external guide rail, as the tie-rod construction is not designed to bear lateral forces.
Adjustable-stroke checklist
As a single-rod cylinder, push and pull forces differ. At 0.5 MPa, it provides 982 N of push force and 825 N of pull force. The maximum push force at the 0.9 MPa operating limit is 1767 N.
Yes, if you need the 10 mm stroke-end adjustability and high-temperature Viton seals. It shares the same 50 mm bore, 20 mm nominal stroke, and PT1/4 ports as a fixed-stroke SC, but the SCJ body is slightly longer to house the rear adjusting mechanism. Ensure the added length fits your machine envelope.
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