Airtac SCJ100 Standard Cylinder SCJ100X120-75S
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X120-75S 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, 120mm nominal stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Nominal stroke120 mm
- Stroke adjust-75 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SCJ100 Standard Cylinder SCJ100X120-75S
The SCJ100X120-75 is a double-acting, single-rod pneumatic cylinder with a rear-cap adjusting screw that provides up to 75 mm of field-adjustable stroke-end control, letting you fine-tune the stopping position without changing the cylinder. With a 100 mm bore and a 25 mm rod, it delivers 3927 N of push force at 0.5 MPa and up to 7068 N at the maximum operating pressure of 0.9 MPa, making it a strong candidate for heavy-duty positioning tasks.
This model includes a built-in magnet, so reed or solid-state sensors (CMSG/DMSG/EMSG) can be clamped directly onto the tie-rod barrel for reliable end-of-stroke detection. The PT3/8 port and M20x1.5 rod thread are standard, and the adjustable air cushion decelerates the piston smoothly over the last 29 mm of travel, protecting the end cap during high-cycle operation.
Airtac SCJ100 Standard Cylinder SCJ100X120-75S Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X120-75S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 120 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 SCJ100X120-75S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×120 | 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 SCJ100X120-75S Is Used
Commissioning & Setup
During machine commissioning, the 75 mm adjustment screw allows engineers to dial in the exact end-of-stroke position for clamps or pushers without fabricating custom hard stops, speeding up the debug phase.
Format Changeover
On packaging lines that switch between box sizes, the adjustable stroke lets operators quickly reset the pusher stroke end to match a new product length, minimizing downtime between batches.
Wear Compensation
In high-cycle pressing or riveting stations, the stroke-end screw can be advanced slightly over time to compensate for tooling wear, maintaining consistent part contact without replacing the actuator.
Is the Airtac SCJ100 Standard Cylinder SCJ100X120-75S the Right Cylinder?
Step up to the 125 mm bore if your application demands more than 6136 N of push force at 0.5 MPa; step down to the 80 mm bore (2513 N push at 0.5 MPa) if the SCJ100 is overpowered for the load. Because the stroke is 120 mm, rod buckling is not a primary concern, but for any off-axis loading, an external guide or a guided cylinder should be used to protect the rod bearing. If you do not need the 75 mm stroke-end adjustment range, a fixed-stroke SC100X125 cylinder with the same port and magnet option is a direct drop-in replacement. For a genuine AirTAC SCJ100X120-75 replacement, match the 100 mm bore, 120 mm nominal stroke, 75 mm adjustment range, PT3/8 port, and the built-in magnet.
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 SCJ100X120-75S FAQ
At 0.5 MPa, the push force 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. Because it is a single-rod cylinder, the push force is always greater than the pull force due to the rod area.
Yes, if your existing cylinder has a 100 mm bore, a nominal stroke of at least 120 mm, a 75 mm adjustment range, a PT3/8 port, and a built-in magnet. The SCJ100X120-75 is a direct form-and-function replacement for an AirTAC SCJ100 of the same configuration. Always verify the mounting style matches your machine's brackets.
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