Airtac SAIJ125 Adjustable Cylinder SAIJ125X85-10S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X85-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm 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.
- BoreØ125 mm
- Stroke85 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X85-10S
The AirTAC SAIJ125X85-10-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 75 to 85 mm. Operating at 0.5 MPa, it generates 6136 N of push force and 5734 N of pull force, making it suitable for heavy-duty positioning tasks. The integrated -S magnet enables direct mounting of CMSE reed or DMSE electronic solid-state sensors along the dual side sensor grooves.
This model features a 32 mm carbon steel rod with an M27x2 thread, paired with 40 mm variable air cushions at both ends to manage kinetic energy. The rear stopper screw allows up to 10 mm of stroke reduction without swapping the cylinder, while the PT tapered port threads ensure a tight pneumatic seal at the G1/2 connection.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X85-10S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X85-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 85 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 SAIJ125X85-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | 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 SAIJ125 Adjustable Cylinder SAIJ125X85-10S Is Used
Product Changeover
Quickly dial in the 75-85 mm stroke window using the rear adjuster when switching a packaging line to a different carton depth, avoiding mechanical rebuilds.
Heavy Press Fit
Leverage the 6136 N push force at 0.5 MPa to seat heavy bearings, using the fine end-stop tuning to prevent over-travel and part damage.
Assembly Station Setup
Utilize the integrated -S magnet with DMSE sensors to confirm retraction, fine-tuning the 10 mm cushion and stopper window during initial machine commissioning.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X85-10S the Right Cylinder?
Choose this 125 mm bore when an 80 mm bore (providing 2513 N push at 0.5 MPa) lacks the thrust for moving heavy fixtures, but a 160 mm bore would be excessive. The 10 mm adjustable window is ideal for dialing in exact end positions during machine commissioning or product changeovers, eliminating the need to fabricate external stopper blocks. For applications requiring secure load holding without live air pressure, note that this adjuster acts solely as a travel stop; you should specify an AirTAC SAIL or BSAI locking cylinder instead.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 85 mm stroke, 10 mm adjustment range, G1/2 PT port, and the -S magnet requirement. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, deliberately omitting FB, CA, CB, and CR brackets. Operating speed ranges from 30 to 500 mm/s.
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 SAIJ125X85-10S FAQ
The rear adjuster acts as a mechanical stop that trims the effective travel. For this SAIJ125X85-10-S model, you can shorten the 85 mm nominal stroke by up to 10 mm, yielding a 75 to 85 mm usable window without altering the cylinder mount.
At 0.5 MPa, this 125 mm bore cylinder produces 6136 N of push force and 5734 N of pull force. If operated at 0.7 MPa, the push force increases to 8590 N.
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