Airtac SCJ50 Standard Cylinder SCJ50X225-30S
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X225-30S 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, 225mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke225 mm
- Stroke adjust-30 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X225-30S
The SCJ50X225-30S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, letting you fine-tune the stop position by up to 30 mm without swapping the unit. Its 50 mm bore and 20 mm rod deliver a push force of 982 N at 0.5 MPa, rising to 1767 N at the 0.9 MPa maximum operating pressure, making it a strong mid-range actuator.
This model includes a built-in magnet, so standard CMSG/DMSG/EMSG reed or solid-state sensors clamp directly onto the tie-rod barrel for end-of-stroke detection. The body length A is 194 mm plus stroke, with an adjustable air cushion to decelerate the piston smoothly.
Airtac SCJ50 Standard Cylinder SCJ50X225-30S Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X225-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 225 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.
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 SCJ50X225-30S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×225 | 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.
Where the Airtac SCJ50 Standard Cylinder SCJ50X225-30S Is Used
Commissioning Fine-Tuning
Dial in the exact stop position during initial machine setup without needing to fabricate custom hard stops or swap cylinders.
Format Changeover
Quickly adjust the stroke end to handle different product sizes on a packaging or sorting line, reducing downtime between batches.
Wear Compensation
Take up mechanical play in a clamping or pressing fixture over time by advancing the rear screw, maintaining consistent tool contact.
Is the Airtac SCJ50 Standard Cylinder SCJ50X225-30S the Right Cylinder?
For a step up in force, the 63 mm bore SCJ offers 1559 N push at 0.5 MPa. If a fixed stroke is acceptable and the adjustment range is not needed, the standard SC50X225 is a direct alternative. When replacing, match the 50 mm bore, 225 mm nominal stroke, 30 mm adjust range, PT port thread, and the built-in magnet. For strokes over 200 mm, ensure the rod is guided externally if significant side loads are present to prevent bending.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-30)
- ✓ 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 SCJ50X225-30S FAQ
At 0.5 MPa air pressure, the push force is 982 N and the pull force is 825 N. At the maximum operating pressure of 0.9 MPa, push force reaches 1767 N.
A screw in the rear cap sets the stroke end position. You can shorten the 225 mm nominal stroke by up to 30 mm in the field, giving an effective range of 195-225 mm without changing the cylinder.
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Related AirTAC SCJ Adjustable-Stroke Cylinders
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