Airtac SCJ40 Standard Cylinder SCJ40X80-100S
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X80-100S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 100 mm range without swapping the cylinder. Ø40mm bore, 80mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke80 mm
- Stroke adjust-100 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X80-100S
The SCJ40X80-100S is a 40 mm bore double-acting single-rod cylinder with a rear adjusting screw that provides a generous 100 mm of field-adjustable stroke-end control, letting you fine-tune the 80 mm nominal stroke without swapping the unit. At 0.5 MPa it delivers 628 N push and 528 N pull, making it a strong contender for medium-force positioning tasks.
This model includes a built-in magnet (-S suffix) so CMSG/DMSG/EMSG reed or solid-state sensors clamp directly onto the tie-rod barrel for reliable end-of-stroke detection. The cylinder uses a 16 mm diameter rod, PT1/4 ports, and an M12x1.25 rod thread, with a 21 mm air cushion to decelerate the piston smoothly.
Airtac SCJ40 Standard Cylinder SCJ40X80-100S Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X80-100S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 80 mm |
| Stroke adjustment | Up to 100 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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, 21 mm |
| Max stroke | Up to 1200 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 SCJ40 Standard Cylinder SCJ40X80-100S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×80 | Nominal (maximum) stroke length in mm. |
| -100 | 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 SCJ40 Standard Cylinder SCJ40X80-100S Is Used
Commissioning & Setup
The 100 mm adjustment range lets technicians dial in the exact stroke end-stop during machine commissioning, accommodating stack-up tolerances without needing to machine custom spacers or order a new cylinder.
Product Changeover
On a packaging line running different box sizes, the stroke can be quickly shortened via the rear screw to match a new format, minimizing downtime between production runs.
Wear Compensation
In clamping or pressing fixtures, the adjustable stroke can be extended slightly over time to compensate for pad wear or tooling compression, maintaining consistent contact force.
Is the Airtac SCJ40 Standard Cylinder SCJ40X80-100S the Right Cylinder?
Step up to a 50 mm bore SCJ (982 N push at 0.5 MPa) if this 40 mm unit's 628 N push force is marginal for your load. For applications that do not require in-field stroke adjustment, the fixed-stroke SC series offers a simpler, more cost-effective alternative. If the 80 mm stroke introduces a side-load risk, consider an external guide rail or a guided cylinder to protect the rod bearing.
To replace this cylinder, match an SCJ with a 40 mm bore, 80 mm nominal stroke, 100 mm adjust range (-100), PT ports, basic mounting, and the -S magnet option. The F-SC40LB foot mount or F-SC40FA front flange can be added if a bracket is needed later.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-100)
- ✓ 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 SCJ40 Standard Cylinder SCJ40X80-100S FAQ
At the standard 0.5 MPa operating pressure, the cylinder produces 628 N of push force and 528 N of pull force. The push force is higher because the single rod reduces the piston area on the return side.
No. The rear adjusting screw only sets the physical stroke end position; it is not a locking device. If the load must be held in place without air pressure, you will need an external mechanical lock or a pilot-operated check valve.
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