Airtac SCJ100 Standard Cylinder SCJ100X35-20S
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X35-20S 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, 35mm nominal stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Nominal stroke35 mm
- Stroke adjust-20 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X35-20S
The SCJ100X35-20S is a 100 mm bore, double-acting single-rod cylinder that puts field-adjustable stroke control directly on the machine. Its rear-cap adjusting screw lets you shorten the stroke end by up to 20 mm without removing the cylinder, making commissioning and format changeovers far faster. At 0.5 MPa, the 25 mm rod delivers 3927 N of push force and 3681 N on the pull stroke, backed by a 29 mm air cushion for smooth deceleration.
This model includes a built-in magnet, 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 PT 1/2 ports keep flow paths generous for the 30-800 mm/s speed range. It is a genuine AirTAC tie-rod cylinder, not an ISO 15552 profile unit, so dimensional interchangeability is limited to another SCJ of the same configuration.
Airtac SCJ100 Standard Cylinder SCJ100X35-20S Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X35-20S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 35 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 SCJ100X35-20S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×35 | 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 SCJ100X35-20S Is Used
End-Stop Fine-Tuning
Use the 20 mm adjustment range to dial in the exact retract or extend stop position during machine commissioning, eliminating the need for shims or external hard stops on linear slides.
Product Format Changeover
Quickly adapt a diverter gate or pusher stroke for different box or pallet sizes on a packaging line. The rear screw adjusts the stroke end in seconds without unbolting the cylinder.
Wear Compensation
In clamping or pressing fixtures, the adjustable stroke can take up mechanical wear in the tooling or workpiece contact point over time, maintaining consistent clamp force without reprogramming a stop.
Is the Airtac SCJ100 Standard Cylinder SCJ100X35-20S the Right Cylinder?
Step up to the SCJ125 bore if your application needs more than the 3927 N push force this 100 mm bore provides at 0.5 MPa; the 125 bore delivers 6136 N push. Conversely, if space and force allow, the SCJ80 bore at 2513 N push is a more compact alternative. A fixed-stroke SC cylinder is the better pick when the stroke length is permanently fixed, as it eliminates the adjusting screw and is slightly shorter overall.
For a direct replacement, match an AirTAC SCJ100 with a 35 mm nominal stroke, a -20 mm adjust range, PT 1/2 ports, a basic mount, and the -S magnet. Because the nominal stroke is short, side-loading is rarely a concern, but always align the rod with the load axis to maximise seal and bearing life.
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 SCJ100X35-20S FAQ
At the standard 0.5 MPa operating pressure, push force is 3927 N and pull force is 3681 N. At the maximum operating pressure of 0.9 MPa, push force reaches 7068 N. The pull force is lower because the 25 mm rod reduces the effective piston area on the return stroke.
No. The SCJ is a standard double-acting cylinder and does not lock or hold position when air is exhausted or the valve is centred. The piston will drift or drop under load. If you need to hold a load without live pressure, you must add an external rod brake, a mechanical lock, or a pilot-operated check valve in the circuit.
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