Airtac SCJ50 Standard Cylinder SCJ50X275-50S
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X275-50S 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, 275mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke275 mm
- Stroke adjust-50 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X275-50S
The SCJ50X275-50S is a double-acting, single-rod pneumatic cylinder with a 50mm bore and a nominal stroke of 275mm, featuring a rear-cap adjusting screw that provides a 50mm field-adjustable range for fine-tuning the stroke end position. With a 20mm diameter piston rod and PT1/4 ports, this model delivers a push force of 982 N at 0.5 MPa, scaling up to 1767 N at the maximum operating pressure of 0.9 MPa, making it a robust mid-range actuator for applications requiring precise end-stop calibration.
This -S variant includes a built-in magnet, allowing direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors along the tie-rod barrel for reliable end-of-stroke detection without additional brackets. The body length A is 194 mm, and the adjustable cushion provides smooth deceleration. The stroke is well within the 1200 mm maximum standard limit for this bore, so it is available as a standard catalog item.
Airtac SCJ50 Standard Cylinder SCJ50X275-50S Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X275-50S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 275 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.
Theoretical Output Force (Ø50mm)
| 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.
Model Code: Airtac SCJ50 Standard Cylinder SCJ50X275-50S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×275 | 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.
Where the Airtac SCJ50 Standard Cylinder SCJ50X275-50S Is Used
Commissioning & Setup
Ideal for machine builders who need to fine-tune the actuator's end position during initial setup without swapping cylinders or machining custom stops, saving hours of mechanical adjustment.
Format Changeovers
Enables quick stroke adjustments on packaging or assembly lines when switching between product sizes, allowing operators to reset the stop position with a simple screw adjustment rather than a full cylinder change.
Wear Compensation
Useful in material handling pushers or stoppers where mechanical wear can shift the stop point over time; the 50mm adjustment range lets technicians easily restore the precise stroke end without downtime.
Is the Airtac SCJ50 Standard Cylinder SCJ50X275-50S the Right Cylinder?
Select the SCJ50X275-50S when your application requires a mid-force actuator with the ability to dial in the stroke end position during commissioning or changeovers, eliminating the need for external hard stops. If you need more force, stepping up to the 63mm bore SCJ63 series provides a push force of 1559 N at 0.5 MPa. For applications where the stroke is fixed and never needs field adjustment, the standard SC50 series offers a more economical fixed-stroke alternative. As a direct replacement, match the 50mm bore, 275mm nominal stroke, 50mm adjust range, PT port thread, basic mounting, and the -S magnet option. For strokes over 300mm, consider an external guide or a guided cylinder to manage potential side loads and prevent rod bending.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-50)
- ✓ Required force at your working pressure
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Set the rear adjusting screw, then lock it before running.
- check Adjust end cushion screws for smooth stops.
- check Use SCJ mounting accessory (FA / LB / TC / TCM1).
- check Installation by qualified personnel per AirTAC docs.
Airtac SCJ50 Standard Cylinder SCJ50X275-50S FAQ
The push force is 982 N at 0.5 MPa and reaches 1767 N at the maximum operating pressure of 0.9 MPa. The pull force is lower due to the single 20mm rod, providing 825 N at 0.5 MPa.
No, like all standard pneumatic cylinders, the SCJ50X275-50S will not hold its position when air pressure is removed or the valve is centered. The piston can drift or drop. To hold a load safely without live pressure, you must add a mechanical lock, an external rod brake, or a pilot-operated check valve in the circuit.
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