Airtac SAIJ125 Adjustable Cylinder SAIJ125AX125-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX125-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 125mm 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
- Stroke125 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX125-100
The AirTAC SAIJ125X125-100 is a double-acting ISO 15552 profile cylinder engineered with a rear stroke adjuster, allowing you to dial back the nominal 125 mm travel by up to 100 mm. This creates a highly versatile 25-125 mm usable travel window, perfect for adapting end positions during product changeovers without swapping the physical cylinder. Belonging to the 125 mm bore class, it delivers a robust 6136 N push force and 5734 N pull force at 0.5 MPa.
This unit features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and carries PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, allowing you to mount CMSE reed or DMSE electronic switches if a magnet is specified later. It operates at speeds of 30-500 mm/s and utilizes variable air cushions at both ends to decelerate heavy loads smoothly.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX125-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX125-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 125 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 SAIJ125AX125-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×125 | 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 SAIJ125AX125-100 Is Used
Product Size Changeovers
Quickly fine-tune the 25-125 mm travel window during line format changes to accommodate varying package lengths without replacing hardware.
Machine Commissioning
Dial in the exact end-of-stroke position during setup using the rear stopper, preventing mechanical crashes before finalizing the layout.
Heavy Clamping Stations
Leverage the 6136 N push force at 0.5 MPa to secure heavy workpieces, using the adjustable stop to vary clamp depth on demand.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX125-100 the Right Cylinder?
Selecting this 125 mm bore cylinder makes sense when your application demands high thrust but requires significant travel flexibility. If 6136 N of push force at 0.5 MPa exceeds your actual load requirements, stepping down to a 100 mm bore yields 3927 N while saving physical space; conversely, an 80 mm bore provides 2513 N for lighter duty. The massive 100 mm adjustment range here is ideal for prototyping or lines running multiple product sizes, functioning as a hard travel stop rather than a position lock.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 125 mm stroke, 100 mm adjustment code, PT port threads, and your required mounting hardware. Supported mounts are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). Because the nominal stroke is 125 mm, side-load risks are minimal, but always guide the load externally. Note that the rear adjuster and air cushions only set the travel end and decelerate the load; they do not hold position without live air. For fail-safe load holding, consider an AirTAC SAIL or BSAI cylinder.
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 SAIJ125AX125-100 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder generates a push force of 6136 N and a pull force of 5734 N. At the maximum 1.0 MPa pressure, it can deliver up to 1251 kgf.
The rear adjuster acts as an external stopper that trims the effective travel. For this model, it provides a usable window from 25 mm to 125 mm, allowing you to shorten the stroke by up to 100 mm without adding external stops.
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