Airtac SAIJ100 Adjustable Cylinder SAIJ100BX850-50S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX850-50S 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 SAIJ100BX850-50S
The AirTAC SAIJ100X850-50-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 850 mm travel by up to 50 mm for an exact 800-850 mm usable window. It delivers substantial thrust, pushing 7068 N at 0.9 MPa, making it suitable for heavy-duty positioning tasks. The extruded aluminum barrel features sensor grooves on both sides, and this specific SKU includes a magnet (-S) for use with AirTAC CMSE reed and DMSE electronic solid-state switches.
This model is built with a SUS304 stainless steel rod (code B) for superior corrosion resistance and features PT tapered port threads. The rear adjuster acts purely as a mechanical stop to fine-tune the end position during commissioning or product changeovers without swapping the cylinder. It is not a locking device and cannot hold a load without continuous live air pressure.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX850-50S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX850-50S |
|---|---|
| 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 SAIJ100BX850-50S
| 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 SAIJ100BX850-50S Is Used
Variable Product Changeover
Dial in the 800-850 mm end-stop during format size changes on a packaging line without physically swapping out the entire actuator.
Heavy-Duty Positioning
Leverage the 7068 N push force at 0.9 MPa to shift heavy pallets or chassis into exact alignment before a secondary operation.
Commissioning Fine-Tuning
Trim the rear travel by up to 50 mm to perfectly time the machine sequence and avoid mechanical hard crashes during initial setup.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX850-50S the Right Cylinder?
Choose this 100 mm bore when you need higher output force than a neighboring 80 mm cylinder can provide (which pushes 4523 N at 0.9 MPa), but without stepping up to the larger 125 mm size. The adjustable stroke is ideal for production lines running variable product sizes, letting you shift the end-stop on the fly rather than adding external stops or buying a fixed-stroke SAI cylinder. For a true ISO 15552 replacement, match the 100 mm bore, 850 mm stroke, 50 mm adjustment code, PT port thread, and the -S magnet requirement.
Because the 850 mm stroke is long and the 25 mm rod is supporting a heavy load, an external guide is highly recommended to prevent excessive side-loading and premature seal wear. Remember that the rear adjuster and air cushions only manage deceleration; if the application requires the load to be held in place without live air, you must use an external rod lock, a pilot-operated check valve, or switch to an AirTAC SAIL or BSAI locking cylinder.
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 SAIJ100BX850-50S FAQ
At an operating pressure of 0.9 MPa, this 100 mm bore cylinder provides a push force of 7068 N and a pull force of 3681 N. It can reach a maximum push force of 801 kgf at 1.0 MPa.
The rear adjusting screw acts as a mechanical stop that shortens the effective travel from the nominal 850 mm down to a minimum of 800 mm. It sets the end position but does not lock the load without live air pressure.
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