Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-40
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 85mm 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
- Stroke85 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-40
The AirTAC SAIJ100X85-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 45 to 85 mm, allowing you to dial back the nominal 85 mm stroke by up to 40 mm during commissioning. This bore size delivers 3927 N of push force at 0.5 MPa, making it well-suited for medium-to-heavy handling tasks.
This configuration uses a SUS304 stainless steel rod (option B) for superior corrosion resistance. It features PT tapered port threads and dual-sided sensor grooves. The adjustment stopper acts purely as a travel end-deceleration device, not a lock, so live air is required to maintain position.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-40 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 85 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 SAIJ100BX85-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×85 | 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 SAIJ100BX85-40 Is Used
Variable End Stops
Fine-tune the retract position on the fly to accommodate varying material thicknesses without mechanical retooling.
Product Changeover
Rapidly adjust the 45-85 mm travel window during production line format changes to handle different package dimensions.
Machine Setup
Dial in the exact end-of-stroke position during initial commissioning to prevent mechanical crashes and optimize cycle timing.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-40 the Right Cylinder?
Choose this adjustable-stroke model when your machine setup requires variable end stops or frequent product-size changeovers without swapping the physical cylinder. If you need less force, stepping down to an 80 mm bore yields 2513 N at 0.5 MPa. If you require load-holding without continuous air pressure, consider the SAIL (air-released lock) or BSAI (clamp-lock) series instead, as the SAIJ adjuster does not hold the load.
To match this ISO 15552 interchangeable cylinder, specify a 100 mm bore, 85 mm stroke, 40 mm adjustment range, PT G1/2 ports, and Basic/FA/LB/TC/FTC/TCM1/TCM2 mountings. No magnet is specified here, so CMSE or DMSE sensors cannot be used without adding the -S option.
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 SAIJ100BX85-40 FAQ
At a 0.5 MPa operating pressure, this 100 mm bore cylinder provides 3927 N of push force and 3681 N of pull force. At 0.7 MPa, the push force increases to 5497 N.
The rear adjuster screw lets you shorten the 85 mm nominal stroke by up to 40 mm, creating a 45-85 mm usable travel window. This allows precise end-position tuning at commissioning without adding external stops.
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