Airtac SCJ100 Standard Cylinder SCJ100X75-20S
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X75-20S 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, 75mm nominal stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Nominal stroke75 mm
- Stroke adjust-20 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X75-20S
The SCJ100X75-20S is a double-acting, single-rod pneumatic cylinder that puts field-adjustable stroke control into a robust 100 mm bore package. Its rear-cap adjusting screw lets you fine-tune the stroke end position by up to 20 mm without removing the cylinder, delivering a powerful 3927 N of push force at 0.5 MPa (7068 N at 0.9 MPa). The built-in magnet allows direct mounting of CMSG/DMSG/EMSG sensors for reliable end-of-stroke detection.
This model uses a 25 mm diameter piston rod and PT1/2 ports, with an adjustable air cushion that decelerates the load smoothly over a 29 mm cushion length. The tie-rod construction and TPU seals suit standard operating temperatures from -20 to +70 °C. The body length A for this SCJ is 245 mm, making it a compact solution for applications where you need to dial in the exact stopping position during commissioning or changeovers.
Airtac SCJ100 Standard Cylinder SCJ100X75-20S Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X75-20S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 75 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 SCJ100X75-20S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×75 | 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 SCJ100X75-20S Is Used
Commissioning & Setup
The 20 mm adjustment range allows engineers to precisely dial in the stroke end position during initial machine setup, compensating for minor assembly tolerances without needing to swap out the cylinder or add external hard stops.
Product Format Changeover
On packaging or sorting lines, the adjustable stroke lets operators quickly change the pusher or stopper position for different product sizes. The built-in magnet provides sensor feedback to confirm the new position is reached every cycle.
Wear Compensation
In clamping or pressing applications, the stroke can be incrementally extended over the cylinder's service life to compensate for wear on tooling or seals, maintaining consistent contact force without reprogramming the machine controller.
Is the Airtac SCJ100 Standard Cylinder SCJ100X75-20S the Right Cylinder?
Choose the SCJ100 when you need the force of a 100 mm bore—3927 N push at 0.5 MPa—with the ability to trim the stroke end on the machine. If your force requirement is lower, stepping down to an 80 mm bore (2513 N push) reduces air consumption and physical size. For higher force, the 125 mm bore offers 6136 N push. The adjustable stroke is ideal for fine-tuning end positions; if you need a fixed, repeatable stroke with no field adjustment, the standard SC series is a more economical choice.
This SCJ100X75-20S is a direct replacement for another AirTAC SCJ100 cylinder with a 75 mm nominal stroke, 20 mm adjust range, PT ports, basic mounting, and a magnet. For strokes of 300 mm or longer, be mindful of side-loading on the 25 mm rod. Use an external guide rail or switch to a guided cylinder if the load is not perfectly aligned with the rod axis.
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 SCJ100X75-20S FAQ
At 0.5 MPa, the push force is 3927 N and the pull force is 3681 N. The pull force is lower because the 25 mm piston rod reduces the effective area on the return stroke. At the maximum operating pressure of 1.0 MPa, the theoretical push force is 7854 N.
You must match the bore, nominal stroke, and adjustment range exactly for a direct replacement. The -20 suffix indicates a 20 mm adjustment range. A cylinder with a -30 or -50 suffix has a different rear screw and will not provide the same stroke-end setting. Also ensure the port thread (PT), mounting style, and magnet option (S) match your current setup.
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