Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-30
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-30 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 SAIJ100BX85-30
The AirTAC SAIJ100X85-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the end position without adding external stops. It provides a usable travel window of 55 to 85 mm, letting you dial back the nominal 85 mm stroke by up to 30 mm during commissioning or product changeovers. Built with an extruded aluminum barrel and a SUS304 stainless steel rod, it delivers a robust 3927 N push force at 0.5 MPa.
This model uses PT tapered port threads and omits the FB, CA, CB, and CR mounting accessories, offering a focused set of Basic, FA, LB, TC, FTC, TCM1, and TCM2 attachments. The rear adjuster acts purely as a mechanical stop to set the travel end and does not hold the load without live air pressure. For load-holding requirements, an external pilot-operated check valve or the AirTAC SAIL lock cylinder is recommended.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-30 Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-30 |
|---|---|
| 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 SAIJ100BX85-30
| 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 SAIJ100BX85-30 Is Used
Machine Setup Commissioning
Dial in the exact retract position within the 55-85 mm window during initial machine commissioning without machining custom spacers.
Product Size Changeover
Quickly adapt the end-stop for different product sizes running on the same line, using the 30 mm adjustment range to accommodate varying part widths.
Variable End-Stop Positioning
Provide precise mechanical end-position tuning for a press or clamping station, relying on the 3927 N thrust to secure the workpiece.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX85-30 the Right Cylinder?
Choose this 100 mm bore when your application requires higher thrust than a neighbouring 80 mm bore (which provides 2513 N push at 0.5 MPa) but does not need the massive 6136 N output of a 125 mm cylinder. The adjustable stroke is selected over a fixed SAI cylinder when a machine requires variable end-stops or precise end-position tuning at setup without physically swapping the actuator. To match this exact configuration, specify a 100 mm bore, 85 mm stroke, 30 mm adjustment, PT ports, SUS304 rod, and no magnet.
Although the 25 mm rod and M20x1.5 rod thread handle substantial side loads, the relatively short 85 mm stroke keeps internal bearing stress low. Remember that the rear screw stopper and the variable air cushions at both ends only decelerate the travel end; they do not function as a brake or 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 SAIJ100BX85-30 FAQ
At a 0.5 MPa operating pressure, this 100 mm bore cylinder generates 3927 N of push force and 3681 N of pull force. At 0.7 MPa, the push force increases to 5497 N.
The rear adjusting screw acts as a mechanical stopper, allowing you to shorten the effective stroke from its 85 mm nominal length down to as little as 55 mm. This provides a 55-85 mm usable travel window for fine-tuning the end position without replacing the cylinder.
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