Airtac SAIJ100 Adjustable Cylinder SAIJ100BX850-40S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX850-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 850mm 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
- Stroke850 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX850-40S
The AirTAC SAIJ100X850-40-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 7068N push force at 0.9 MPa, utilizing a 25mm piston rod with an M20x1.5 thread and a G1/2 port. By turning the rear adjustment screw, you can trim the nominal 850mm stroke back by up to 40mm, creating an 810 to 850mm usable travel window for exact end-position calibration.
This specific SKU features a SUS304 stainless steel rod for superior corrosion resistance and includes a magnet (-S) for position sensing with AirTAC CMSE reed or DMSE electronic solid-state switches. The extruded aluminum barrel includes sensor grooves on both sides. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR options found on some other series.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX850-40S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX850-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 850 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 SAIJ100BX850-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×850 | 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 SAIJ100BX850-40S Is Used
Product Size Changeover
Quickly dial in the 810-850mm stroke window during production line changeovers to accommodate varying package lengths without changing hardware.
Machine Setup Calibration
Fine-tune the exact end-of-stroke position during initial commissioning using the rear screw, ensuring precise mechanical stops without external spacers.
Heavy Material Handling
Leverage the 7068N push force at 0.9 MPa to move heavy pallets or transfer bulky components along an external guide rail system.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX850-40S the Right Cylinder?
Choose this 100mm bore if you need more thrust than the 80mm version (which provides 4523N push at 0.9 MPa) but want to avoid the larger footprint of the 125mm cylinder. The adjustable stroke is ideal for machine setups requiring variable end stops or product-size changeovers, allowing you to fine-tune the travel distance at commissioning without swapping out the entire cylinder or adding external stops.
Because the stroke is 850mm, an external guide rail is strongly recommended to prevent side-loading damage to the rod seals, as long unsupported strokes can induce deflection. Remember that the rear adjuster acts only as a travel stop and works alongside the air cushions to decelerate the load; it does not hold the load without live air pressure. For true load-holding without continuous air, consider the SAIL (air-released lock) or BSAI (clamp-lock) series. To match this ISO 15552 replacement exactly, specify the 100mm bore, 850mm stroke, 40mm adjustment, PT tapered port, SUS304 (B) rod material, and the -S magnet.
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 SAIJ100BX850-40S FAQ
At an operating pressure of 0.9 MPa, this 100mm bore cylinder generates a push force of 7068N and a pull force of 3681N. The maximum thrust is 801 kgf at 1.0 MPa.
The rear adjuster screw allows you to shorten the nominal 850mm stroke by up to 40mm, providing an adjustable travel window of 810 to 850mm. The adjuster acts as a mechanical stop to set the end position and does not function as a lock to hold the load without air pressure.
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