Airtac SCJ100 Standard Cylinder SCJ100X70-10S
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X70-10S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 10 mm range without swapping the cylinder. Ø100mm bore, 70mm nominal stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Nominal stroke70 mm
- Stroke adjust-10 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X70-10S
The SCJ100X70-10S is a 100 mm bore, double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end. Its rear-cap screw provides a 10 mm adjustment range, letting you fine-tune the 70 mm nominal stroke for commissioning or format changes without replacing the unit. At 0.5 MPa, 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), allowing direct mounting of CMSG/DMSG/EMSG sensors along the tie-rod barrel for reliable end-of-stroke detection. The standard PT1/2 ports and TPU seals suit general industrial air service from -20 to +70 °C, and the 29 mm air cushion decelerates the piston quietly at each end of travel.
Airtac SCJ100 Standard Cylinder SCJ100X70-10S Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X70-10S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 70 mm |
| Stroke adjustment | Up to 10 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 SCJ100X70-10S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×70 | Nominal (maximum) stroke length in mm. |
| -10 | 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 SCJ100X70-10S Is Used
Commissioning & Setup
The 10 mm rear screw adjustment allows technicians to dial in the exact retract end position during initial machine setup, compensating for minor stack-up tolerances in the tooling.
Wear Compensation
In high-cycle clamping or pressing fixtures, the adjustable stroke can be used to take up mechanical wear on contact surfaces over time, maintaining consistent clamping force without shims.
Format Changeover
For packaging or assembly lines running multiple product sizes, operators can quickly adjust the stroke end stop to suit a new format, reducing changeover time compared to swapping fixed-stroke cylinders.
Is the Airtac SCJ100 Standard Cylinder SCJ100X70-10S the Right Cylinder?
Choose the SCJ100 bore when your application needs around 3927 N of push force at standard 0.5 MPa plant air. If you can work with less force, stepping down to an 80 mm bore saves space and air consumption while still providing 2513 N of push. For fixed-stroke applications where no end-position tuning is required, the standard SC100 cylinder is a simpler, cost-effective alternative. A direct replacement must match the 100 mm bore, 70 mm nominal stroke, 10 mm adjust range, PT port thread, and the integrated magnet.
At this 70 mm stroke, rod side-loading is not a primary concern, but for strokes exceeding 300 mm or applications with significant lateral forces, add an external guide unit or consider a guided cylinder to protect the rod bearing from bending moments.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-10)
- ✓ 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 SCJ100X70-10S FAQ
The theoretical push force at 0.5 MPa is 3927 N, and the pull force is 3681 N (due to the 25 mm rod area). At the maximum operating pressure of 1.0 MPa, the push force reaches 7068 N. Always apply a safety factor for real-world dynamic loads.
A screw in the rear cap limits how far the piston can retract, shortening the stroke end by up to 10 mm. This is a mechanical end-stop adjustment only. The cylinder does not lock or hold position when air pressure is lost; an external rod brake or pilot-operated check valve is required for load holding.
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