Airtac SCJ100 Standard Cylinder SCJ100X275-20S
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X275-20S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 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-20 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X275-20S
The SCJ100X275-20S is a double-acting, single-rod pneumatic cylinder from AirTAC, featuring a rear-cap adjusting screw that provides up to 20 mm of field-adjustable stroke-end reduction. This allows precise fine-tuning of the piston's stopping position without replacing the cylinder or adding external hard stops, making it ideal for commissioning and format changeovers. With a 100 mm bore and a 25 mm diameter piston rod, it generates a substantial 3927 N of push force and 3681 N of pull force at 0.5 MPa, suitable for demanding clamping, pressing, and positioning tasks.
This model includes a built-in magnet (-S suffix), allowing direct mounting of CMSG/DMSG/EMSG reed or solid-state sensors on the tie-rod barrel for reliable, non-contact end-of-stroke detection. The standard PT 1/2 port threads and TPU seals provide a durable, cost-effective solution for filtered air systems operating from -20 to +70 °C. With a body length A of 245 mm and a 29 mm air cushion, it offers smooth deceleration for high-cycle applications.
Airtac SCJ100 Standard Cylinder SCJ100X275-20S Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X275-20S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 275 mm |
| Stroke adjustment | Up to 20 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 SCJ100X275-20S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×275 | Nominal (maximum) stroke length in mm. |
| -20 | 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 SCJ100X275-20S Is Used
End-Stop Fine-Tuning on Presses
The 20 mm adjustable stroke allows operators to precisely dial in the final pressing depth on an assembly press to compensate for part tolerance variations, ensuring consistent joint quality without reprogramming a servo drive.
Product Gate with Format Changeover
Ideal for a heavy-duty diverter gate on a conveyor line. The stroke can be quickly adjusted to handle different package widths during a product changeover, eliminating the need for mechanical stop changes and reducing downtime.
Commissioning a Clamping Station
During the commissioning of a new welding fixture, the adjustable stroke screw allows the integrator to set the exact clamp closure point to match the tooling, simplifying setup and avoiding the need to machine custom-length spacers.
Is the Airtac SCJ100 Standard Cylinder SCJ100X275-20S the Right Cylinder?
Choose the SCJ100X275-20S when your application demands a high-force actuator with the ability to tweak the stroke end position on the machine. If 3927 N of push force at 0.5 MPa is more than needed, stepping down to an 80 mm bore (2513 N push) can reduce air consumption and physical size. For applications requiring a fixed, non-adjustable stroke, the standard SC100X275-S is a simpler alternative. This cylinder is a direct dimensional replacement for another AirTAC SCJ100 with a 275 mm nominal stroke and 20 mm adjust range.
For a 275 mm stroke, the extended piston rod is susceptible to side loading and bending. To ensure long seal life and prevent rod damage, it is critical to guide the load externally with a linear rail or use a guided cylinder when the load is not perfectly aligned with the rod axis. The built-in magnet makes sensor integration straightforward for sequence control.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-20)
- ✓ 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 SCJ100X275-20S FAQ
The theoretical push force at 0.5 MPa is 3927 N, and the pull force is 3681 N. At the maximum operating pressure of 0.9 MPa, the push force reaches 7068 N. The force is determined by the bore size and air pressure; the stroke adjustment screw does not alter the cylinder's output force.
The SCJ has a rear-cap screw that allows you to shorten the stroke end position by up to 20 mm. This is a mechanical adjustment for the piston's stopping point, not a speed or force control. It is ideal for field adjustments, whereas a standard SC cylinder has a fixed, non-adjustable stroke length.
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