The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X75-30 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø50mm bore, 75mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ50X75-30 delivers 982 N of push force at 0.5 MPa, placing it in a mid-range force class ideal for clamping and light pressing tasks. Its rear adjusting screw provides a 30 mm field-adjustable stroke end, allowing operators to fine-tune the cylinder's stopping position without removing it from the machine.
This single-rod, double-acting cylinder features a 20 mm piston rod and an adjustable air cushion for smooth deceleration. The body length A is 194 mm, and it uses a PT1/4 port. The adjustable range is particularly useful during commissioning or for taking up wear in tooling over time.
| Model | Airtac SCJ50 Standard Cylinder SCJ50X75-30 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 75 mm |
| Stroke adjustment | Up to 30 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. |
| ×75 | Nominal (maximum) stroke length in mm. |
| -30 | 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 30 mm rear screw adjustment lets technicians quickly dial in the exact stroke end position during initial machine setup without swapping cylinders or machining external stops.
On packaging lines, the adjustable stroke allows operators to compensate for different product sizes by fine-tuning the pusher's stopping point, reducing changeover time.
As gripper pads or tooling wear down over cycles, the stroke can be incrementally extended via the rear screw to maintain consistent contact and part quality.
Choose the SCJ50X75-30 when you need a 50 mm bore force class with the ability to dial in the stroke end position on the fly. If 982 N of push at 0.5 MPa is insufficient, stepping up to a 63 mm bore provides 1559 N. For a fixed, non-adjustable stroke, the standard SC series is a simpler alternative. This model is a direct replacement for any AirTAC SCJ50X75-30 with a PT port and basic mounting. For strokes over 300 mm, consider an external guide to protect the 20 mm rod from side loads.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 982 N and the pull force is 825 N. The maximum push force at the 0.9 MPa operating limit is 1767 N. The pull force is lower because the 20 mm rod reduces the effective piston area on the return stroke.
Yes, the SCJ50X75-30 has the same bore, nominal stroke, and mounting footprint as an SC50X75. The key difference is the rear adjusting screw, which makes the overall body length slightly longer. Ensure the 30 mm adjustment range fits your space envelope.
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