Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-20S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 165mm 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
- Stroke165 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-20S
The AirTAC SAIJ125X165-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 6136N of push force and 5734N of pull force at 0.5 MPa, providing robust actuation for heavy-duty tooling. The built-in magnet enables position sensing across both sensor grooves using AirTAC CMSE reed and DMSE electronic switches.
This specific SKU features a 165 mm nominal stroke paired with a 20 mm adjustment screw, creating a usable travel window of 145 to 165 mm. This allows operators to dial in the exact retract end-position during commissioning or product changeover without adding external stops. The adjuster acts purely as a mechanical travel stop and does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-20S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 165 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 SAIJ125X165-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×165 | 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 SAIJ125X165-20S Is Used
Product Changeover
Dial in the 145-165mm retract position precisely when switching product sizes on a packaging line, eliminating the need to swap cylinders or bolt on external mechanical stops.
Heavy Tooling Actuation
Leverage the 6136N push force at 0.5MPa to move heavy stamping dies or large clamps, using the fine adjustment to set the exact resting position.
End-Position Tuning
Fine-tune the end-of-stroke location during machine commissioning to align heavy fixtures perfectly, using the rear stopper rather than repositioning the entire cylinder assembly.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X165-20S the Right Cylinder?
Selecting this 125 mm bore model makes sense when your application requires substantial thrust—stepping down to an 80 mm bore yields 2513N at 0.5 MPa, which is often insufficient for heavier jigs. The 145-165 mm adjustable window is ideal for production lines running multiple product sizes, allowing rapid end-stop tuning instead of physically swapping out fixed-stroke SAI cylinders. For any load-holding requirements without continuous air pressure, this standard adjuster is not a lock; you should instead specify a SAIL or BSAI series cylinder.
Because this configuration features a 32 mm carbon steel rod with an M27x2 thread and a 165 mm stroke, it handles moderate side loads well, though any long, unsupported tooling should still use an external guide. It is dimensionally interchangeable per ISO 15552 and uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB, CA, CB, and CR brackets. It features PT tapered port threads and a speed range of 30-500 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 SAIJ125X165-20S FAQ
The rear adjusting screw allows you to shorten the effective stroke by up to 20 mm, providing a usable travel window of 145 to 165 mm. This mechanical stopper sets the retract end-position but does not lock or hold the load without continuous air pressure.
At a 0.5 MPa operating pressure, this cylinder provides 6136N of push force and 5734N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 1251 kgf of push force.
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 SAIJ125X165-20S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.