Airtac SCJ50 Standard Cylinder SCJ50X225-100
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X225-100 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 100 mm range without swapping the cylinder. Ø50mm bore, 225mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke225 mm
- Stroke adjust-100 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X225-100
The SCJ50X225-100 is a double-acting, single-rod pneumatic cylinder that delivers 982 N of push force at 0.5 MPa, making it a capable mid-range actuator for industrial tasks. Its defining feature is the rear-cap adjusting screw, which allows the stroke end position to be shortened by up to 100 mm, giving technicians a 100 mm field-adjustable window to fine-tune the stopping point without removing the cylinder from the machine.
This 50 mm bore model uses a 20 mm diameter piston rod and PT1/4 ports, with a 21 mm air cushion at each end to decelerate the piston smoothly. The body length A(SCJ) is 194 mm, and the maximum standard stroke for this bore is 1200 mm, so the requested 225 mm stroke is well within the standard range. Operating pressure spans 0.15–1.0 MPa, and the standard TPU seal suits ambient temperatures from -20 to +70 °C.
Airtac SCJ50 Standard Cylinder SCJ50X225-100 Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X225-100 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 225 mm |
| Stroke adjustment | Up to 100 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 SCJ50X225-100
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×225 | Nominal (maximum) stroke length in mm. |
| -100 | 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 SCJ50X225-100 Is Used
Commissioning & Setup
The 100 mm adjust range lets commissioning engineers precisely set the stroke end for a new machine without fabricating custom hard stops, saving hours of mechanical rework.
Format Changeover
On a packaging line, operators can quickly adjust the push stroke for different box sizes by turning the rear screw, eliminating the need to swap cylinders between production runs.
Wear Compensation
In clamping or pressing fixtures, the adjustable stroke can be gradually extended to compensate for tooling wear or material thickness variations, maintaining consistent clamping force over time.
Is the Airtac SCJ50 Standard Cylinder SCJ50X225-100 the Right Cylinder?
Choose the SCJ50X225-100 when you need a stroke that can be dialed in on-site, such as during commissioning or after a format change. If 982 N of push force at 0.5 MPa is insufficient, stepping up to a 63 mm bore provides 1559 N of push force, while a step down to 40 mm bore offers 628 N. For applications that do not require stroke adjustability, the fixed-stroke SC50 series is a simpler, cost-effective alternative.
This model is a direct dimensional replacement for another AirTAC SCJ50 cylinder with a 225 mm nominal stroke and 100 mm adjust range, provided the port thread (PT) and basic mounting match. At this stroke length, ensure the rod is not subjected to significant side loads; if lateral forces are present, add an external linear guide or consider a guided cylinder to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-100)
- ✓ 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 SCJ50X225-100 FAQ
At 0.5 MPa, the cylinder generates 982 N of push force and 825 N of pull force. At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 1963 N. The push force is higher because the single rod reduces the effective piston area on the pull side.
Yes, this SCJ50X225-100 is a direct replacement for any AirTAC SCJ50 cylinder with a 225 mm nominal stroke and a 100 mm adjustable range, provided the mounting style and port thread (PT) are the same. The adjustable stroke end is set by the rear screw and does not alter the cylinder's envelope dimensions.
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