Airtac SAIJ125 Adjustable Cylinder SAIJ125X800-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X800-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 800mm 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.
- BoreØ125 mm
- Stroke800 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X800-100S
The AirTAC SAIJ125X800-100-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering robust performance for demanding pneumatic setups. It features a 125 mm bore generating 6136 N of pull force at 0.5 MPa, alongside an integrated magnet for position sensing. The extruded aluminum barrel includes sensor grooves on both sides, allowing direct mounting of CMSE reed and DMSE electronic switches without extra brackets.
This specific SKU provides a 700-800 mm usable travel window, allowing you to dial back the nominal 800 mm stroke by up to 100 mm during commissioning. It operates at 30-500 mm/s and utilizes a PT tapered port thread with a 32 mm carbon steel rod. The rear adjuster acts purely as a mechanical stop to fine-tune the end position; it does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X800-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X800-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 800 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 40 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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ125 Adjustable Cylinder SAIJ125X800-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×800 | 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 SAIJ125 Adjustable Cylinder SAIJ125X800-100S Is Used
Variable End-Stop Tuning
Dial in the exact retract distance within the 700-800 mm window during machine commissioning to accommodate different product sizes without external physical stops.
Product Changeover
Quickly adjust the effective stroke on packaging or processing lines when switching between item lengths, minimizing downtime and mechanical rework.
Heavy-Duty Positioning
Leverage the 125 mm bore's 6136 N pull force to move substantial masses into a precise end position while using DMSE solid-state sensors for confirmation.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X800-100S the Right Cylinder?
Choose this adjustable-stroke model when an installation requires exact end-position tuning without swapping out the entire cylinder or adding external stops. If your application needs less force, stepping down to an 80 mm bore yields 2268 N of pull at 0.5 MPa. Conversely, moving up to a 160 mm bore provides 9425 N of pull for heavier loads.
Because this unit features an 800 mm stroke, the 32 mm rod and M27x2 thread provide substantial rigidity, but an external guide is still recommended to prevent side-load damage over long unsupported travels. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR brackets. For applications requiring true load-holding without continuous air pressure, consider the SAIL or BSAI series instead of relying on the rear stopper.
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 SAIJ125 Adjustable Cylinder SAIJ125X800-100S FAQ
The rear adjusting screw allows you to mechanically shorten the effective travel from the nominal 800 mm down to 700 mm, creating a 700-800 mm usable window. This stopper only sets the end position and does not lock or hold the load without live air pressure.
At 0.5 MPa, this 125 mm bore cylinder generates 6136 N of pull force and 8590 N at 0.7 MPa. The included -S magnet enables position detection using AirTAC CMSE reed switches or DMSE electronic sensors mounted in the dual-side barrel grooves.
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