Airtac SCJ100 Standard Cylinder SCJ100X80-20
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X80-20 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, 80mm nominal stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Nominal stroke80 mm
- Stroke adjust-20 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X80-20
The SCJ100X80-20 is a double-acting, single-rod pneumatic cylinder from the AirTAC SCJ adjustable-stroke family, featuring a rear-cap screw that lets you shorten the stroke end by up to 20 mm in the field. With a 100 mm bore and 25 mm rod, this tie-rod unit delivers a substantial 3927 N of push force at 0.5 MPa (7068 N at the 0.9 MPa maximum operating pressure), making it a workhorse for pressing, clamping, and positioning tasks where the final stop point needs fine-tuning during commissioning or changeover.
Its PT1/2 ports and M20x1.5 rod thread keep connections robust, while the built-in 29 mm adjustable air cushion decelerates the piston smoothly at both ends. The body length A for this SCJ model is 245 mm, and the standard stroke ceiling for the 100 mm bore is 1500 mm, so this 80 mm nominal stroke is well within the standard range.
Airtac SCJ100 Standard Cylinder SCJ100X80-20 Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X80-20 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 80 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 SCJ100X80-20
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×80 | 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 SCJ100X80-20 Is Used
Commissioning & Setup
Fine-tune the end position of a heavy pressing station during initial machine build-out without machining new stops or swapping cylinders.
Product Format Changeover
Quickly adjust a stop gate or diverter arm's travel for different box sizes on a packaging line, minimizing downtime between batches.
Wear Compensation
Take up mechanical play in a clamping fixture over time by slightly extending the effective stroke, maintaining consistent clamping force without replacing parts.
Is the Airtac SCJ100 Standard Cylinder SCJ100X80-20 the Right Cylinder?
Choose the SCJ100X80-20 when you need the high force of a 100 mm bore (3927 N push at 0.5 MPa) but also require the ability to dial in the stroke end precisely during setup. If your force needs are lower, stepping down to the 80 mm bore (2513 N push) saves space and air consumption; if you need more, the 125 mm bore offers 6136 N push. This adjustable-stroke model is the right pick over a fixed-stroke SC when the machine's end-stop position is not yet final or may change with tooling wear. For a direct replacement, match the 100 mm bore, 80 mm nominal stroke, 20 mm adjust range, PT port thread, and basic mounting style. If your application involves significant side loading, consider an external guide rail or a guided cylinder to protect the rod and bearings.
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 SCJ100X80-20 FAQ
At 0.5 MPa, the push force is 3927 N and the pull force is 3681 N (reduced due to the 25 mm rod area). At the maximum operating pressure of 0.9 MPa, the push force reaches 7068 N.
A rear-cap screw sets the stroke end position, shortening the nominal 80 mm stroke by up to 20 mm. It does not change the cylinder's force. You can replace a fixed-stroke SC100X80 with this SCJ100X80-20 if you need the adjustability, provided the port (PT1/2), mounting, and magnet options match your current setup.
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