Airtac SCJ100 Standard Cylinder SCJ100X75-20
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X75-20 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 SCJ100X75-20
The SCJ100X75-20 is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, letting you fine-tune the 75 mm nominal stroke by up to 20 mm using the rear-cap adjusting screw. With a 100 mm bore, it delivers 3927 N of push force at 0.5 MPa and a substantial 7068 N at the maximum operating pressure of 0.9 MPa, making it suitable for heavy pressing, clamping, and positioning tasks where the final stroke length must be dialled in precisely on the machine.
This cylinder uses a 25 mm diameter piston rod with an M20x1.5 thread and PT1/2 ports. The adjustable air cushion, with a 29 mm cushion length, decelerates the piston smoothly at the stroke end you set. The body length A(SCJ) is 245 mm, and the standard temperature range is -20 to +70 °C with the default TPU seals.
Airtac SCJ100 Standard Cylinder SCJ100X75-20 Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X75-20 |
|---|---|
| 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 SCJ100X75-20
| 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 SCJ100X75-20 Is Used
End-Stop Calibration
Dial in the precise stopping point for a heavy press tool during initial setup, using the 20 mm adjustment range to compensate for tooling tolerances without re-machining the mounting brackets.
Format Changeover
Quickly adjust the stroke end for different product sizes on a packaging or assembly line. The rear screw allows operators to shift the stroke from 55 mm to 75 mm in seconds to handle varying box heights.
Wear Compensation
Take up mechanical play or seal wear in a long-running clamping fixture. The adjustable stroke lets maintenance teams restore the full clamping force by slightly extending the stroke end, avoiding immediate cylinder replacement.
Is the Airtac SCJ100 Standard Cylinder SCJ100X75-20 the Right Cylinder?
Choose the SCJ100X75-20 when you need the 3927 N push force of a 100 mm bore but must fine-tune the stroke end during commissioning or changeover. If your force requirement is lower, stepping down to an 80 mm bore (2513 N push at 0.5 MPa) reduces air consumption and physical size. For a fixed, non-adjustable stroke, the standard SC series is a simpler alternative. If side loads are a concern with this 75 mm stroke, an external guide rail is recommended to protect the rod bearings.
This model is a direct replacement for an existing AirTAC SCJ100X75-20 with PT ports and basic mounting. When replacing, match the 100 mm bore, 75 mm nominal stroke, and the 20 mm adjustment range. For mounting, the SCJ100 accepts FA front flange, LB foot, or TC centre trunnion accessories (part codes F-SC100FA, F-SC100LB, F-SC100TC). A magnet option (-S) is not included on this unit.
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 SCJ100X75-20 FAQ
At 0.5 MPa, the push force is 3927 N and the pull force is 3681 N (the difference is due to the 25 mm single rod). At the maximum operating pressure of 0.9 MPa, the push force reaches 7068 N. These forces are identical to the fixed-stroke SC100 cylinder.
Yes, if you need the 20 mm field-adjustable stroke feature. The SCJ100X75-20 has the same 100 mm bore, port size (PT1/2), and mounting interfaces as the SC100. Ensure your machine can accommodate the slightly longer SCJ body length (A=245 mm) and that a 75 mm nominal stroke with 20 mm of adjustment covers your required motion range.
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