Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-75S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-75S 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 SAIJ125AX165-75S
The AirTAC SAIJ125X165-75-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 165 mm travel by up to 75 mm. This creates a highly flexible 90-165 mm usable stroke window, perfect for fine-tuning end positions during machine commissioning without swapping out the entire unit. It delivers a robust 6136 N push force at 0.5 MPa, utilizing a PT tapered port thread and an SUS420J2 stainless steel rod (code A) for enhanced durability.
Because this variant includes the -S magnet, it integrates seamlessly with AirTAC CMSE reed and DMSE electronic solid-state sensors housed in the dual-side extruded barrel grooves. The rear adjuster acts purely as a mechanical stop to set the retraction end-point and relies on the built-in air cushion for deceleration; it does not lock or hold the load without continuous live air pressure. For load-holding requirements, an external rod lock or related SAIL pneumatic lock cylinder is required.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-75S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-75S |
|---|---|
| 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 SAIJ125AX165-75S
| 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 SAIJ125AX165-75S Is Used
Machine Changeover
Quickly adapt to different product lengths on a packaging line by dialing the stroke back from 165 mm to 90 mm via the rear screw, eliminating the need to physically swap cylinders.
Heavy Forming Press
Leverage the 6136 N push force at 0.5 MPa for pressing and riveting operations, using the fine stroke adjustment to set precise bottoming depth without repositioning the entire fixture.
Variable End-Stop Positioning
Use the 75 mm adjustment window to vary the retraction end-point for delicate material handling, relying on the standard air cushion to smoothly decelerate the load at the newly set position.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX165-75S the Right Cylinder?
Selecting this 125 mm bore cylinder makes sense when your application demands high thrust—stepping up from a 100 mm bore raises push force from 3927 N to 6136 N at 0.5 MPa, while dropping down to an 80 mm bore would reduce it to 2513 N. The 75 mm adjustment range is exceptionally wide, allowing a single cylinder to accommodate multiple product sizes or changeovers on a packaging line without adding external stops. When integrating this model, specify the 125 mm bore, 165 mm stroke, 75 mm adjustment, PT port thread, and the -S magnet for sensor tracking.
Mounting options are limited to the SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR styles. Although the 165 mm stroke is under the 300 mm threshold where external guides become strictly necessary, the heavy 32 mm rod and M27x2 thread provide excellent side-load resistance. Remember that the adjustable stopper only trims the travel distance; it cannot brake or hold a load mechanically if air pressure is lost.
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 SAIJ125AX165-75S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. If pressure is increased to 0.7 MPa, the push force rises to 8590 N.
The rear adjuster screw allows you to mechanically shorten the effective stroke from its nominal 165 mm down to as little as 90 mm. This stopper sets the travel end-point for commissioning, but it does not lock the load without live air pressure.
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 SAIJ125AX165-75S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.