Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-40S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-40S 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 SAIJ100BX85-40S
The AirTAC SAIJ100X85-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that trims the nominal 85 mm travel back by up to 40 mm, yielding a precise 45-85 mm usable window. Delivering 3927 N of push force at 0.5 MPa, it handles heavy loads while allowing on-the-fly end-position tuning during commissioning without swapping cylinders.
This SKU is built with a SUS304 stainless steel rod for superior corrosion resistance and includes a magnet for CMSE and DMSE sensors. The extruded aluminum barrel provides dual sensor grooves, and fluid is supplied via PT tapered G1/2 ports. The rear screw acts purely as a travel stop to set deceleration, not as a lock to hold the load without live air.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-40S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-40S |
|---|---|
| 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 SAIJ100BX85-40S
| 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 SAIJ100BX85-40S Is Used
Product Changeover
Dial in the 45-85 mm travel window instantly on the rear screw when switching between part sizes on a machining line, avoiding manual stop repositioning.
Heavy Clamping
Leverage 3927 N of push force at 0.5 MPa to secure heavy workpieces, using the fine stroke adjustment to prevent over-travel and crush damage.
Assembly Pressing
Press bearings or pins to an exact depth, using the SUS304 rod in humid environments and CMSE/DMSE sensors to confirm the adjusted end position.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-40S the Right Cylinder?
Select this 100 mm bore when a 63 mm bore (1559 N push at 0.5 MPa) is insufficient for moving heavy fixtures, but an 80 mm bore (2513 N) leaves no margin. The 40 mm adjustment range is ideal for machines requiring variable end-stops during product changeovers, avoiding the need to bolt on external stops or buy a fixed-stroke SAI cylinder. For true load-holding without continuous air pressure, integrate an external rod lock or select a SAIL or BSAI model.
To match this ISO 15552 dimensionally interchangeable cylinder, confirm the 100 mm bore, 85 mm stroke, 40 mm adjustment, PT G1/2 port, and the -S magnet. Mounting is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR brackets.
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 SAIJ100BX85-40S 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 acts as a mechanical stop, allowing you to shorten the 85 mm nominal stroke by up to 40 mm, creating a 45-85 mm usable travel window. It only sets the end position and does not lock the load without live air pressure.
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