Airtac SAIJ125 Adjustable Cylinder SAIJ125BX75-20
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125BX75-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 75mm 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
- Stroke75 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125BX75-20
The AirTAC SAIJ125X75-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 55-75 mm usable travel window. Delivering 6136 N of push force at 0.5 MPa, it handles heavy loads with precision. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
This model uses a SUS304 stainless steel rod for superior corrosion resistance and features PT tapered ports. The rear adjuster acts purely as a mechanical stop to fine-tune the retract position, meaning it cannot hold a load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125BX75-20 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125BX75-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 75 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 SAIJ125BX75-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×75 | 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 SAIJ125BX75-20 Is Used
Heavy Press Fit
Dial in the exact 55-75 mm insertion depth for heavy press-fit operations during initial setup.
Product Changeover
Quickly adjust the retract end-stop to accommodate different product sizes on the same line.
Material Forming
Use the 6136 N thrust at 0.5 MPa for forming tasks requiring precise, repeatable end positions.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125BX75-20 the Right Cylinder?
Choose this 125 mm bore when a 100 mm cylinder (providing 3927 N push at 0.5 MPa) lacks thrust, but a 160 mm bore is physically too large. The 20 mm adjustment range is ideal for dialing in exact end-stops during machine commissioning without adding external stops. For load-holding without air, use a SAIL or BSAI cylinder instead.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 75 mm stroke, PT ports, and the Basic, FA, LB, TC, FTC, TCM1, or TCM2 mounting set. The operating speed is 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 SAIJ125BX75-20 FAQ
The rear adjuster screw acts as a mechanical stop, allowing you to trim the effective travel back by up to 20 mm. This creates a 55-75 mm usable stroke window for fine-tuning without swapping cylinders.
At 0.5 MPa, it provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SAI Cylinders
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