Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-20S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-20S 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 SAIJ100BX85-20S
The AirTAC SAIJ100X85-20-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling you to dial back the 85 mm nominal travel by up to 20 mm. This yields a precise 65-85 mm usable end-position window at commissioning without swapping the hardware. Delivering 3927 N of push force at 0.5 MPa, it handles heavy positioning tasks with ease.
This variant features a SUS304 stainless steel rod for superior corrosion resistance and pairs with PT tapered port threads. It includes a magnet (-S) for position sensing, supporting AirTAC CMSE reed and DMSE solid-state switches mounted in the dual-side sensor grooves. The rear adjuster acts purely as a travel stop and relies on the integrated air cushions for end-of-stroke deceleration; it does not hold the load without live air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-20S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-20S |
|---|---|
| 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 SAIJ100BX85-20S
| 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 SAIJ100BX85-20S Is Used
Product Changeovers
Dial in the 65-85 mm travel window on the rear stopper to accommodate varying package sizes on the fly without changing the cylinder.
Machine Setup Tuning
Fine-tune the end position during commissioning to perfect the stroke, eliminating the need to bolt on external physical stops.
Heavy Forming Stops
Leverage the 3927 N push force for heavy pressing or forming tasks while using the built-in air cushions to decelerate the load.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-20S the Right Cylinder?
Select this 100 mm bore cylinder when an application requires substantial thrust (3927 N push at 0.5 MPa) alongside variable end-stop positioning. If your setup demands less force, stepping down to an 80 mm bore yields 2513 N push force; if more is needed, a 125 mm bore provides 6136 N. Choose the adjustable SAIJ over a fixed-stroke SAI when you need fine-tuning during machine setup or product changeovers rather than machining external stops.
To replace an ISO 15552 cylinder, match the 100 mm bore, 85 mm stroke, 20 mm adjustment range, PT G1/2 port, and the -S magnet. The SAIJ mounting set is restricted to Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, CR). For load-holding without live air, consider the SAIL (air-released lock) or BSAI (clamp-lock) instead of relying on the adjuster.
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 SAIJ100BX85-20S FAQ
At 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 20 mm, creating a 65-85 mm adjustable travel window. This stopper only sets the end position and decelerates the load; it does not lock or hold the load without continuous air pressure.
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