The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X350-75 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. Ø50mm bore, 350mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ50X350-75 is a 50 mm bore double-acting single-rod cylinder with a field-adjustable stroke end. Its rear-cap screw provides a 75 mm adjustment range, letting you fine-tune the 350 mm nominal stroke without replacing the cylinder. The 20 mm diameter rod delivers 982 N of push force at 0.5 MPa and 1767 N at the 0.9 MPa maximum operating pressure.
This tie-rod cylinder uses PT1/4 ports and an M16x1.5 rod thread. The adjustable cushion is 21 mm long, and the SCJ body length is 194 mm. It handles speeds of 30-800 mm/s and is rated for a maximum standard stroke of 1200 mm for this bore size.
| Model | Airtac SCJ50 Standard Cylinder SCJ50X350-75 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 350 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, 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. |
| ×350 | 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 adjustment range lets technicians quickly dial in the exact end-stop position during machine commissioning, accommodating assembly tolerances without swapping parts.
On packaging lines, the adjustable stroke allows operators to reposition a stop gate or pusher for different box sizes, reducing changeover time between product runs.
In clamping or pressing fixtures, the screw can be advanced to take up mechanical wear on tooling or seals, maintaining consistent clamp force over the cylinder's service life.
Choose the SCJ50X350-75 when you need to dial in a mid-range stroke on a 50 mm bore platform. If your force requirement is lower, the 40 mm bore (879 N push at 0.7 MPa) saves space; for more force, step up to the 63 mm bore (2182 N push at 0.7 MPa). For a fixed, non-adjustable stroke, the standard SC series is a simpler alternative. This cylinder replaces any AirTAC SCJ50 with a 350 mm nominal stroke and a 75 mm adjustment range, matching PT ports and basic mounting. At this 350 mm stroke, ensure the rod is supported against side loads; if not, add an external guide rail.
Adjustable-stroke checklist
At 0.5 MPa, it delivers 982 N pushing and 825 N pulling. The push force increases to 1767 N at the maximum operating pressure of 0.9 MPa. The pull force is lower due to the single 20 mm rod reducing the piston area on the return stroke.
Yes, provided the bore (50 mm), port thread (PT1/4), and mounting style match. The SCJ50X350-75 offers a nominal 350 mm stroke that you can shorten by up to 75 mm via the rear screw, giving you flexibility a fixed-stroke SC cannot.
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