Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-50S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-50S 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 SAIJ100BX85-50S
The AirTAC SAIJ100X85-50-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel down to a 35-85 mm window. Delivering 3927 N of push force at 0.5 MPa, it handles heavy actuation tasks with precision. This variant includes a SUS304 stainless steel rod for superior corrosion resistance and a -S magnet for position sensing.
The rear stopper lets you fine-tune end positions at commissioning without adding external stops. This adjuster acts purely as a travel limiter and does not hold the load without live air; for position holding, consider SAIL or BSAI types. It supports speeds of 30-800 mm/s and uses a G1/2 port.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-50S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-50S |
|---|---|
| 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 SAIJ100BX85-50S
| 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 SAIJ100BX85-50S Is Used
Machine Setup Tuning
Dial in the exact 35-85 mm travel limit during machine commissioning to perfect end positions without machining new hard stops.
Product Size Changeover
Quickly adapt the cylinder stroke on packaging lines when switching product sizes, using the rear screw to shorten travel by up to 50 mm.
Heavy Assembly Pressing
Leverage the 3927 N push force at 0.5 MPa for heavy pressing tasks while relying on the SUS304 rod for corrosion resistance.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-50S the Right Cylinder?
Choose this 100 mm bore when 50 mm (982 N at 0.5 MPa) is insufficient for your push force requirements. The 50 mm adjustment range is ideal for product changeovers, allowing you to dial in the exact end-stop on the fly rather than swapping a fixed-stroke SAI cylinder. When matching ISO 15552 replacements, verify the 85 mm stroke, 50 mm adjustment, G1/2 port, PT thread, and -S magnet.
For any stroke over 300 mm, an external guide is recommended to manage side loads, though this 85 mm stroke is well within standard limits. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options.
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 SAIJ100BX85-50S FAQ
The rear adjuster acts as a mechanical stop that lets you shorten the 85 mm nominal stroke by up to 50 mm, providing a usable travel window of 35-85 mm. It only limits travel and does not lock the load without live air pressure.
At 0.5 MPa operating pressure, it provides 3927 N of push force and 3681 N of pull force. At 0.9 MPa, the push force increases to 7068 N.
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Standard models usually ship in 3-4 days.
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