Airtac SCJ50 Standard Cylinder SCJ50X275-10
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X275-10 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, 275mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke275 mm
- Stroke adjust-10 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X275-10
The SCJ50X275-10 is a double-acting, single-rod pneumatic cylinder with a rear-cap adjusting screw that lets you shorten the stroke end by up to 10 mm. This field-adjustable feature is ideal for commissioning trials or format changeovers where the exact stopping position needs to be dialled in on the machine. With a 50 mm bore and a 20 mm piston rod, it delivers 982 N of push force at 0.5 MPa, making it a capable mid-range actuator for clamping, pressing, and diverting tasks.
The tie-rod body measures 194 mm in length and uses PT1/4 ports with an M16x1.5 rod thread. Its air cushion decelerates the piston over the final 21 mm of travel, protecting the end cap from impact. This model ships in a basic configuration with a TPU seal, suitable for standard operating temperatures from -20 to +70 °C.
Airtac SCJ50 Standard Cylinder SCJ50X275-10 Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X275-10 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 275 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.
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 SCJ50X275-10
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×275 | 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.
Where the Airtac SCJ50 Standard Cylinder SCJ50X275-10 Is Used
Commissioning & Setup
The 10 mm rear screw adjustment lets technicians fine-tune the end-stop position during machine commissioning without swapping cylinders or machining external hard stops.
Product Diverting
Use the adjustable stroke to perfectly align a diverter gate with different lane widths on a packaging conveyor, compensating for mechanical stack-up tolerances.
Wear Take-Up
Over time, tooling or gripper pads can wear. The adjusting screw provides a quick way to advance the stroke end and maintain consistent clamping pressure without reprogramming the machine.
Is the Airtac SCJ50 Standard Cylinder SCJ50X275-10 the Right Cylinder?
Step up to the 63 mm bore SCJ63X275-10 if you need more force—it provides 1559 N of push at the same 0.5 MPa pressure. For applications that do not require field adjustment of the stroke, the fixed-stroke SC50X275 is a simpler and more cost-effective alternative. If your load creates a significant side force, consider an external guide rail or a guided cylinder, as the 275 mm stroke on a 20 mm rod can be susceptible to bending under off-axis loads. This SCJ model is a direct dimensional replacement for another AirTAC SCJ50X275-10 with PT ports and basic mounting.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-10)
- ✓ 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 SCJ50X275-10 FAQ
At 0.5 MPa, the push force is 982 N and the pull force is 825 N. The pull force is lower because the 20 mm piston rod reduces the effective piston area on the return stroke.
Yes, the SCJ50X275-10 shares the same bore, rod, and port dimensions as the fixed-stroke SC50. The body is slightly longer to accommodate the adjusting screw, so ensure you have clearance at the rear cap. The stroke is adjustable down from the nominal 275 mm by up to 10 mm.
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