Airtac SCJ100 Standard Cylinder SCJ100X250-75S
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X250-75S 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. Ø100mm bore, 250mm nominal stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Nominal stroke250 mm
- Stroke adjust-75 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X250-75S
The SCJ100X250-75S is a 100 mm bore, double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end. Its rear-cap screw provides up to 75 mm of stroke-end retraction, letting you fine-tune the stop position without changing the cylinder body. At a standard 0.5 MPa air supply, it delivers 3927 N of push force and 3681 N on the pull stroke, driven through a 25 mm diameter piston rod.
This model includes a built-in magnet (-S suffix), so standard CMSG, DMSG, or EMSG reed and solid-state sensors clamp directly onto the tie-rod barrel for reliable end-of-stroke sensing. The body length A is 245 mm, and the adjustable air cushion decelerates the piston smoothly at both ends. It uses a PT1/2 port and an M20x1.5 rod thread, suiting it for heavy linear positioning tasks where the stroke length needs periodic tweaking.
Airtac SCJ100 Standard Cylinder SCJ100X250-75S Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X250-75S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 250 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 SCJ100X250-75S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×250 | 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 SCJ100X250-75S Is Used
Commissioning & Setup
The 75 mm adjustable stroke range lets technicians dial in the exact stop position during machine commissioning without swapping cylinders or machining external hard stops, saving hours of setup time.
Product Format Changeover
On packaging or assembly lines handling multiple product sizes, operators can quickly adjust the cylinder's end-of-stroke to match a new box height or component position, reducing changeover downtime.
Wear Compensation
In high-cycle pressing or clamping fixtures, the stroke-end screw can be advanced slightly over time to compensate for tooling wear or material compression, maintaining consistent clamp force without reprogramming.
Is the Airtac SCJ100 Standard Cylinder SCJ100X250-75S the Right Cylinder?
Choose the SCJ100 when your application needs roughly 4000 N of push force at standard line pressure. If you need more force, step up to the SCJ125, which offers 6136 N of push at 0.5 MPa. For lower force requirements, the SCJ80 provides 2513 N. The adjustable stroke is ideal for commissioning and format changes, but if your stroke is fixed and never needs field adjustment, the standard SC100 fixed-stroke cylinder is a more economical choice. For a drop-in replacement, match the 100 mm bore, 250 mm nominal stroke, 75 mm adjust range, PT port thread, and the -S magnet option.
At a 250 mm stroke, the piston rod is extended significantly. If your load applies a side force or is guided imprecisely, consider an external guide rail or switching 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 SCJ100 Standard Cylinder SCJ100X250-75S FAQ
The push force is 3927 N at 0.5 MPa, 5497 N at 0.7 MPa, and reaches 7068 N at the maximum operating pressure of 0.9 MPa. The pull force is slightly lower due to the 25 mm rod area, providing 3681 N at 0.5 MPa. The theoretical maximum force at 1.0 MPa is 801 kgf.
Yes, if you need the adjustable stroke feature. The SCJ100X250-75S shares the same 100 mm bore, PT1/2 ports, and mounting accessories as the SC100. Ensure your machine can accommodate the slightly longer body length A of 245 mm for the SCJ, and that the 75 mm stroke adjustment range covers your required stroke variation.
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