Airtac SCJ100 Standard Cylinder SCJ100X275-75
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X275-75 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. Ø100mm bore, 275mm nominal stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Nominal stroke275 mm
- Stroke adjust-75 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X275-75
The SCJ100X275-75 is a double-acting, single-rod pneumatic cylinder from AirTAC, engineered with a rear-cap adjusting screw that provides a 75 mm field-adjustable stroke range. This allows you to fine-tune the stroke end position from the nominal 275 mm down to 200 mm directly on the machine, without swapping the cylinder or adding external hard stops. It delivers a substantial 3927 N of push force at 0.5 MPa, making it a powerful solution for heavy-duty positioning tasks.
This tie-rod cylinder features a 25 mm diameter piston rod, a PT1/2 port, and an M20x1.5 rod thread for robust mechanical connections. The built-in adjustable air cushion, with a 29 mm cushion length, ensures smooth deceleration of high-inertia loads at the end of the stroke. With a body length of 245 mm, it is designed for reliable, long-life operation in demanding industrial environments.
Airtac SCJ100 Standard Cylinder SCJ100X275-75 Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X275-75 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 275 mm |
| Stroke adjustment | Up to 75 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/2 |
| Rod thread | M20×1.5 |
| 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, 29 mm |
| Max stroke | Up to 1500 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 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 SCJ100 Standard Cylinder SCJ100X275-75
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×275 | 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 SCJ100 Standard Cylinder SCJ100X275-75 Is Used
Format Changeovers
Quickly adjust the end-stop for different product sizes on a packaging or palletizing line. The 75 mm range allows operators to switch between multiple formats without mechanical rework, minimizing downtime.
Clamping & Pressing
Fine-tune the final clamp position for workpieces with slight thickness variations. The screw adjustment compensates for material tolerances, ensuring consistent clamping pressure without crushing delicate parts.
Wear Compensation
In high-cycle stopper or diverter applications, use the adjusting screw to take up mechanical wear on contact surfaces over time. This maintains precise positioning accuracy and extends the service life of the tooling.
Is the Airtac SCJ100 Standard Cylinder SCJ100X275-75 the Right Cylinder?
Select the SCJ100X275-75 when your application requires a powerful, field-tunable stroke end for commissioning, format changes, or wear compensation. If your force requirements are lower, stepping down to the 63 mm bore (1559 N push at 0.5 MPa) can reduce size and cost. For higher force, the 125 mm bore offers 6136 N of push force. If your stroke length is fixed and will never need adjustment, the standard SC100X275 fixed-stroke cylinder is a more economical choice.
For this 275 mm stroke, be mindful of side-loading on the 25 mm rod. If the load is not guided externally, the bending moment can cause premature seal wear and rod deflection. In such cases, always use an external guide rail or consider a guided cylinder assembly. As a direct replacement, match this model to another SCJ100 with a 275 mm nominal stroke, 75 mm adjust range, PT1/2 ports, and the same basic mounting configuration.
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 SCJ100 Standard Cylinder SCJ100X275-75 FAQ
The theoretical push force at 0.5 MPa is 3927 N, and the pull force is 3681 N. The force is identical to a fixed-stroke SC100 cylinder of the same bore because the adjusting screw only changes the stroke end position, not the piston area or operating pressure.
No. The adjusting screw is strictly a mechanical stroke-end limiter and does not lock the piston rod. If air pressure is lost or the directional valve is centered, the piston will drift or drop. You must add an external rod lock or a pilot-operated check valve to hold a load safely without live pressure.
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