Airtac SCJ50 Standard Cylinder SCJ50X65-75S
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X65-75S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 75 mm range without swapping the cylinder. Ø50mm bore, 65mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke65 mm
- Stroke adjust-75 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X65-75S
The SCJ50X65-75S is a double-acting, single-rod tie-rod cylinder with a field-adjustable stroke end, delivering 982 N of push force at 0.5 MPa. Its 75 mm rear adjusting screw lets you fine-tune the stroke end position without removing the cylinder, making it ideal for commissioning trials, format changeovers, or taking up mechanical wear. The 20 mm piston rod and PT1/4 ports handle standard pneumatic flows, while the adjustable air cushion decelerates the load smoothly.
This model includes a built-in magnet (-S suffix), so you can directly mount CMSG/DMSG/EMSG reed or solid-state sensors on the barrel for end-of-stroke detection. With a body length of 194 mm (A dimension) and a maximum standard stroke of 1200 mm for the 50 bore family, it fits compact machine layouts. The 65 mm nominal stroke sits well within standard limits, ensuring off-the-shelf availability.
Airtac SCJ50 Standard Cylinder SCJ50X65-75S Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X65-75S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 65 mm |
| Stroke adjustment | Up to 75 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 SCJ50X65-75S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×65 | Nominal (maximum) stroke length in mm. |
| -75 | 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 SCJ50X65-75S Is Used
Commissioning & Setup
Fine-tune the end position during machine commissioning without swapping cylinders or machining external hard stops, saving hours of mechanical work.
Format Changeovers
Quickly adjust the stroke for different product sizes on packaging or assembly lines by turning the rear screw, eliminating the need for multiple fixed-stroke cylinders.
Wear Compensation
Take up mechanical play or tooling wear over time by incrementally adjusting the stroke end, maintaining precise positioning without replacing components.
Is the Airtac SCJ50 Standard Cylinder SCJ50X65-75S the Right Cylinder?
Choose the SCJ50X65-75S when you need a mid-range force actuator with the flexibility to adjust the stroke end by up to 75 mm on the machine. If your application requires more force, step up to the 63 mm bore (1559 N push at 0.5 MPa); for a lighter, more compact solution, the 40 mm bore (628 N push) may suffice. This adjustable-stroke model is the right pick over a fixed-stroke SC when your end-stop position is not yet finalised or needs periodic tweaking.
For replacement, match this unit with another AirTAC SCJ adjustable-stroke cylinder of 50 mm bore, 65 mm nominal stroke, and a 75 mm adjust range (-75), with PT port thread and a built-in magnet (-S). If the rod is exposed to side loads, consider an external guide rail or switch to 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 (-75)
- ✓ 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 SCJ50X65-75S FAQ
At 0.5 MPa, it provides 982 N of push force and 825 N of pull force. At the maximum operating pressure of 0.9 MPa, the push force reaches 1767 N. The pull force is lower due to the area of the 20 mm piston rod.
A rear-cap screw sets the stroke end position within a 75 mm range, shortening the 65 mm nominal stroke. This is a mechanical end-stop adjustment, not a locking device. The cylinder will not hold its position if air pressure is lost; an external rod brake or pilot-operated check valve is required for load holding.
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