Airtac SAIJ125 Adjustable Cylinder SAIJ125X85-20
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X85-20 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 SAIJ125X85-20
The AirTAC SAIJ125X85-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 65 to 85 mm, allowing you to dial back the nominal 85 mm stroke by up to 20 mm during commissioning. Built with a robust 32 mm carbon steel rod and PT tapered port threads, it delivers 6136 N of push force at 0.5 MPa.
This adjustable model omits the FB, CA, CB, and CR mounts, offering a focused set of attachments including Basic, FA, LB, TC, FTC, TCM1, and TCM2. The extruded aluminum barrel includes dual sensor grooves for positioning switches, though standard CMSE reed or DMSE electronic sensors require a magnet option to function.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X85-20 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X85-20 |
|---|---|
| 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 SAIJ125X85-20
| 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 SAIJ125X85-20 Is Used
Machine Changeover
Fine-tune the 65-85 mm retract position during product size changes without swapping hardware.
High-Force Positioning
Leverage 6136 N of thrust to move heavy assemblies into an adjustable final end-stop.
Assembly Line Setup
Dial in the exact clamping distance during initial commissioning to perfect downstream operations.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X85-20 the Right Cylinder?
Select this 125 mm bore cylinder when an application demands high thrust (6136 N at 0.5 MPa) alongside variable end-stop positioning. If you need less force, stepping down to an 80 mm bore yields 2513 N. Choose the SAIJ adjustable version over a fixed SAI when you need to fine-tune the retract position on product changeovers without adding external stops.
For any load-holding requirements, note that the rear adjuster acts only as a travel stop and does not lock the rod without live air pressure. In those cases, an external pilot-operated check valve or a related SAIL lock cylinder is required. To replace an ISO 15552 cylinder, match the 125 mm bore, 85 mm stroke, 20 mm adjustment, PT port, and mounting interface.
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 SAIJ125X85-20 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force.
The rear adjuster acts as a travel stop, letting you shorten the 85 mm nominal stroke by up to 20 mm, creating a 65-85 mm usable window. It does not lock the load without live air.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SAI Cylinders
Request a Quote for Airtac SAIJ125 Adjustable Cylinder SAIJ125X85-20
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.