Airtac SAIJ100 Adjustable Cylinder SAIJ100X850-40S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100X850-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 850mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ100 mm
- Stroke850 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100X850-40S
The AirTAC SAIJ100X850-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 810-850 mm, letting you dial in the exact end position during commissioning without adding external stops. Driven by a 25 mm carbon steel rod with an M20x1.5 thread, it delivers 5497 N of push force at 0.7 MPa.
This model includes a magnetic piston (-S) for position sensing with AirTAC CMSE reed or DMSE electronic switches. It uses a G1/2 port and relies on a 36 mm air cushion at both ends to decelerate the load. The rear adjuster acts purely as a travel stop, so it will not hold the load without live air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100X850-40S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100X850-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 850 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| 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, 36 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
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 | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ100 Adjustable Cylinder SAIJ100X850-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×850 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ100 Adjustable Cylinder SAIJ100X850-40S Is Used
Product Changeover
Fine-tune the 810-850 mm travel window during line changeovers to accommodate different product lengths without swapping hardware.
Machine Setup
Dial in the exact retract stop during initial commissioning to perfect end-of-stroke positioning and avoid mechanical hard stops.
Variable End Stops
Adjust the rear screw to set precise product push-off distances on a conveyor without repositioning the cylinder mount.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100X850-40S the Right Cylinder?
Select this 100 mm bore when you need substantial thrust—5497 N at 0.7 MPa—combined with variable end-position tuning. If your application requires less force, stepping down to an 80 mm bore yields 3518 N at 0.7 MPa. Choose the SAIJ adjustable-stroke format over a fixed SAI cylinder when you need fine end-position tuning during product changeovers.
With an 850 mm stroke, the 25 mm rod needs external guidance to prevent side-load damage. For ISO 15552 replacement matching, specify the 100 mm bore, 850 mm stroke, 40 mm adjustment, G1/2 PT ports, and the -S magnet. The mounting set is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2. For load-holding without live pressure, use an external rod lock or pilot-operated check valve.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ100 Adjustable Cylinder SAIJ100X850-40S FAQ
At 0.7 MPa operating pressure, this 100 mm bore cylinder provides 5497 N of push force and 5198 N of pull force. At the maximum 1.0 MPa pressure, it achieves 7068 N of push force.
The rear adjuster screw lets you shorten the 850 mm nominal stroke by up to 40 mm, creating a usable travel window between 810 and 850 mm. It functions as a mechanical stop and does not lock the load without air pressure.
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