Airtac SAIJ125 Adjustable Cylinder SAIJ125X80-50
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X80-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 80mm 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
- Stroke80 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X80-50
The AirTAC SAIJ125X80-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that trims the nominal 80 mm travel back by up to 50 mm. This yields a highly flexible 30-80 mm usable travel window, allowing you to dial in exact end positions during commissioning without swapping out the unit. It delivers a robust 6136 N push force at 0.5 MPa, making it ideal for heavy positioning tasks.
This model incorporates a 32 mm carbon steel piston rod and a PT tapered port thread. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic sensors. The rear adjuster acts purely as a mechanical stop for end-position tuning, not a load-holding lock.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X80-50 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X80-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 80 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 SAIJ125X80-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×80 | 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 SAIJ125X80-50 Is Used
Variable End-Stop Positioning
Dial in precise end positions within the 30-80 mm travel window to accommodate varying product sizes without physically remounting the actuator.
Machine Changeover Setup
Quickly fine-tune the rear stopper during product line changeovers to establish new end-of-stroke limits rapidly and safely.
Heavy-Duty Forming
Leverage the 6136 N push force at 0.5 MPa for pressing or forming operations that require exact, field-adjustable stroke depths.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X80-50 the Right Cylinder?
Select this 125 mm bore cylinder when an application requires substantial force—6136 N push at 0.5 MPa—along with variable end-stop positioning. If you need less force, stepping down to an 80 mm bore yields 2513 N push. The 50 mm adjustment range is perfect for product-size changeovers on a line, providing a 30-80 mm travel window without adding external stops. To replace an ISO 15552 cylinder, match the 125 mm bore, 80 mm stroke, PT tapered ports, and the chosen mounting set.
Because the nominal stroke is 80 mm, side-load risks are minimal, though the 32 mm rod handles standard loads well. Remember that the SAIJ mounting set is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. For applications requiring the load to be held without live air pressure, you must use an external rod lock or pilot-operated check valve, as the SAIJ rear adjuster is only a travel stop.
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 SAIJ125X80-50 FAQ
At an operating pressure of 0.5 MPa, this 125 mm bore cylinder generates 6136 N of push force and 5734 N of pull force. It can reach a maximum push force of 11045 N at 0.7 MPa.
The rear adjuster screw allows you to shorten the nominal 80 mm stroke by up to 50 mm, creating a usable travel window of 30 to 80 mm. This stopper only sets the travel end and 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 SAIJ125X80-50
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.