Airtac SCJ50 Standard Cylinder SCJ50X75-75S
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X75-75S 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, 75mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke75 mm
- Stroke adjust-75 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X75-75S
The SCJ50X75-75S is a double-acting, single-rod pneumatic cylinder that puts stroke-end fine-tuning directly in your hands. Its rear-cap adjusting screw offers a full 75 mm of adjustment, letting you dial in the exact stop position from 0 to 75 mm without swapping the cylinder. With a 50 mm bore and 20 mm rod, it delivers 982 N of push force at 0.5 MPa, providing a robust 1767 N at the maximum operating pressure of 0.9 MPa.
This model includes a built-in magnet, coded by the 'S' suffix, so you can mount CMSG, DMSG, or EMSG sensors directly on the tie-rod barrel for reliable, non-contact position sensing. The standard TPU seals and PT ports keep it ready for general industrial air service. The body length A(SCJ) is 194 mm, and the adjustable air cushion helps manage end-of-stroke impacts across the 30-800 mm/s speed range.
Airtac SCJ50 Standard Cylinder SCJ50X75-75S Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X75-75S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 75 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 SCJ50X75-75S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×75 | 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 SCJ50X75-75S Is Used
Commissioning & Setup
Ideal for machine builders during initial commissioning, the 75 mm adjustment screw allows rapid fine-tuning of the actuator's end-stop to perfectly align tooling or stops without needing to machine custom spacers or reposition the entire cylinder.
Product Changeover
On packaging or sorting lines, the adjustable stroke enables quick mechanical format changes. Operators can easily reset the cylinder's stopping position to handle different box sizes or product widths, dramatically reducing downtime between batches.
Wear Compensation
In high-cycle clamping or pressing operations, the stroke-end screw can be periodically advanced to compensate for wear on gripper pads or tooling surfaces, maintaining consistent clamping force and part quality over the life of the consumables.
Is the Airtac SCJ50 Standard Cylinder SCJ50X75-75S the Right Cylinder?
Choose the SCJ50X75-75S when your application demands a 75 mm field-adjustable stroke from a compact 50 mm bore platform. If your force requirement is lower, stepping down to the 40 mm bore SCJ series reduces push force to 628 N at 0.5 MPa, saving space and air consumption. For higher force, the 63 mm bore provides a significant jump to 1559 N. If you do not need stroke adjustability, the fixed-stroke SC series is a simpler, more cost-effective alternative. A direct replacement must match the 50 mm bore, 75 mm nominal stroke, 75 mm adjustment range, PT ports, and the integrated magnet for sensor compatibility.
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 SCJ50X75-75S FAQ
As a single-rod cylinder, push and pull forces are different. At 0.5 MPa, the push force is 982 N and the pull force is 825 N. At the maximum operating pressure of 0.9 MPa, the push force increases to 1767 N. The adjusting screw only changes the stroke end position and does not alter the cylinder's force output.
The rear-cap screw mechanically limits how far the piston can extend, giving you a variable stroke end-stop within a 0-75 mm range from the full 75 mm nominal stroke. It is a position limiter, not a lock. If air pressure is lost, the rod can be pushed back. For load holding without pressure, you must add an external rod lock or a pilot-operated check valve.
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