Airtac SCJ100 Standard Cylinder SCJ100X80-20S
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X80-20S 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, 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 SCJ100X80-20S
The SCJ100X80-20S is a 100 mm bore double-acting single-rod cylinder with a rear adjusting screw, giving you up to 20 mm of field-adjustable stroke-end control. With a push force of 3927 N at 0.5 MPa and a pull force of 3681 N, it handles substantial linear loads while letting you fine-tune the end position without swapping the cylinder.
This model includes a built-in magnet, so you can directly mount CMSG/DMSG/EMSG reed or solid-state sensors on the tie-rod barrel for reliable end-of-stroke detection. The PT1/2 port, 25 mm rod, and 29 mm air cushion provide smooth deceleration, making it a versatile workhorse for industrial automation tasks that need both power and precise position adjustment.
Airtac SCJ100 Standard Cylinder SCJ100X80-20S Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X80-20S |
|---|---|
| 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 SCJ100X80-20S
| 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 SCJ100X80-20S Is Used
Commissioning & Setup
During machine commissioning, the 20 mm adjustment screw lets technicians quickly dial in the exact stroke end position for a 100 mm bore actuator, compensating for stack-up tolerances without needing to machine custom stops.
Format Changeover
On packaging lines, the SCJ100X80-20S can be re-adjusted for different box sizes or product formats. The 3927 N push force at 0.5 MPa provides ample power for case erectors or palletizing stops, and the built-in magnet confirms each cycle.
Wear Compensation
In high-cycle clamping or pressing fixtures, the stroke-end screw can be advanced over time to compensate for tooling or pad wear, maintaining consistent clamp force and part quality without reprogramming the machine controller.
Is the Airtac SCJ100 Standard Cylinder SCJ100X80-20S the Right Cylinder?
Choose the SCJ100 when your application needs the 3927 N push force at 0.5 MPa that this 100 mm bore delivers. If you can work with a lower force, the 80 mm bore SCJ80 provides 2513 N push and a smaller footprint. For higher force requirements, the 125 mm bore SCJ125 steps up to 6136 N push. This adjustable-stroke model is the right choice when you need to fine-tune the stroke end on the machine, but if your stroke is fixed and never needs adjustment, the standard SC100 fixed-stroke cylinder is a simpler, more cost-effective alternative.
For a direct replacement, match the 100 mm bore, 80 mm nominal stroke, and the 20 mm adjust range. Ensure the replacement has the same PT port thread, built-in magnet, and basic mounting. For strokes of 300 mm or more, be mindful of side loading on the 25 mm rod; an external guide or a guided cylinder is recommended to prevent rod bending and ensure long service 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 SCJ100X80-20S FAQ
The push force is 3927 N at 0.5 MPa and 7068 N at the maximum operating pressure of 0.9 MPa. The pull force on the retract stroke is slightly lower at 3681 N at 0.5 MPa, due to the area of the 25 mm piston rod.
A rear-cap screw lets you shorten the stroke end by up to 20 mm, so the 80 mm nominal stroke is the maximum. It is a drop-in replacement for an SC100 of the same bore and stroke if you need the field-adjustability, but the SCJ body is slightly longer. You must match the PT port thread and the built-in magnet option.
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