Airtac SAIJ125 Adjustable Cylinder SAIJ125BX175-20
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125BX175-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 175mm 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
- Stroke175 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 SAIJ125BX175-20
The AirTAC SAIJ125X175-20 is a double-acting ISO 15552 profile cylinder featuring a rear mechanical stroke adjuster. It provides a usable travel window of 155 to 175 mm, allowing you to dial in the exact retract position without adding external stops. Operating at 0.7 MPa yields 8590 N of push force and 5734 N of pull force, making it robust enough for heavy actuators.
This specific SKU is configured with a SUS304 stainless steel rod for superior corrosion resistance and utilizes PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic switches. The rear adjuster acts strictly as a travel stop to fine-tune the end position, so live air pressure is required to hold the load securely.
Airtac SAIJ125 Adjustable Cylinder SAIJ125BX175-20 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125BX175-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 175 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 SAIJ125BX175-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×175 | 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 SAIJ125BX175-20 Is Used
Precision End-Stop Tuning
Dial in the exact retract position within a 155-175 mm window during machine commissioning without swapping out the entire cylinder body.
Product Size Changeover
Quickly adjust the stroke end-point by up to 20 mm on packaging lines when running a new product length, eliminating the need for external mechanical spacers.
Heavy Load Positioning
Leverage the 8590 N push force at 0.7 MPa to move heavy pallets or fixtures, using the rear stopper to precisely define the retraction limit.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125BX175-20 the Right Cylinder?
Select this 125 mm bore when your application demands high thrust—8590 N at 0.7 MPa—and benefits from on-machine stroke tuning during product changeovers. If you need less force, stepping down to the 100 mm bore provides 5497 N at 0.7 MPa. The 20 mm adjustment range is ideal for setting up variable end-stops on the fly, whereas a fixed SAI cylinder would require physical spacers for every new product size.
For load-holding without continuous air pressure, this cylinder is not sufficient as the rear adjuster only stops travel; it does not lock the piston. You would need to pivot to an SAIL air-released lock or BSAI clamp-lock cylinder instead. To replace an ISO 15552 cylinder on a machine, match the 125 mm bore, 175 mm stroke, 20 mm adjustment, PT G3/8 ports, and the Basic, FA, LB, TC, FTC, TCM1, or TCM2 mounting set.
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 SAIJ125BX175-20 FAQ
At 0.7 MPa, this 125 mm bore cylinder generates 8590 N of push force and 5734 N of pull force. The operational speed range is 30-500 mm/s.
The rear adjuster acts as a mechanical stop that lets you shorten the 175 mm nominal stroke by up to 20 mm, providing an effective travel window of 155 to 175 mm. It only sets the end position 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 are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SAI Cylinders
Request a Quote for Airtac SAIJ125 Adjustable Cylinder SAIJ125BX175-20
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.