Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-75S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-75S 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 SAIJ100BX85-75S
The AirTAC SAIJ100X85-75-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, featuring a 100mm bore and an 85mm nominal stroke. By turning the rear screw, you can trim the stroke back by up to 75mm, creating a highly versatile 10-85mm usable travel window for precise end-position tuning during commissioning. It delivers 3927N of push force at 0.5 MPa and uses a SUS304 stainless steel rod for superior corrosion resistance.
This adjustable design eliminates the need to swap cylinders or bolt on external stops when product sizes change on a line. It includes a magnet for CMSE reed and DMSE electronic sensors, which mount cleanly into the extruded aluminum barrel's dual sensor grooves. The rear adjuster acts solely as a travel stop to set deceleration, meaning it will not hold a load without live air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-75S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-75S |
|---|---|
| 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 SAIJ100BX85-75S
| 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 SAIJ100BX85-75S Is Used
Product Changeover Tuning
Dial in the 10-85mm travel window during format changes on packaging lines, setting exact retract distances for varying package sizes without swapping hardware.
Adjustable End-Stop Machining
Fine-tune the retract position during machine commissioning to perfectly seat parts, using the rear stopper instead of relying on hard external fixtures.
Variable Stroke Clamping
Adapt clamping force and travel for different workpiece heights on an automated line, leveraging the 3927N push force and 75mm adjustment range.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-75S the Right Cylinder?
Choose this 100mm bore model when an application demands high thrust (3927N at 0.5 MPa) alongside variable end-stops. If you need less force, stepping down to an 80mm bore yields 2513N of push force at 0.5 MPa, whereas moving up to a 125mm bore provides 6136N. The wide 10-85mm adjustment window makes this SKU ideal for machines running multiple product sizes, allowing operators to fine-tune the retract distance on the fly instead of maintaining a stock of fixed-stroke SAI cylinders.
When matching an ISO 15552 replacement, verify the 100mm bore, 85mm stroke, 75mm adjustment range, PT tapered port threads, and the -S magnet option. The 25mm rod diameter and M20x1.5 rod thread provide robust resistance to side loading. However, because the usable stroke can extend up to 85mm, an external guide is still recommended for heavy loads. For load-holding without live pressure, select a SAIL or BSAI cylinder instead, as the SAIJ adjuster is not a lock.
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 SAIJ100BX85-75S FAQ
The rear adjuster screw acts as a mechanical stop that can trim the nominal 85mm stroke back by up to 75mm, providing a usable travel window of 10-85mm. It sets the end position and deceleration point but does not lock or hold the load without continuous air pressure.
At a 0.5 MPa operating pressure, the SAIJ100X85-75-S generates 3927N of push force and 3681N of pull force. It can reach up to 7068N of push force at 0.9 MPa.
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