Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-40S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 950mm 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
- Stroke950 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-40S
The AirTAC SAIJ125X950-40-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 6136 N of push force at 0.5 MPa, utilizing a 32 mm carbon steel rod and G1/2 PT port. The integrated -S magnet enables position detection with AirTAC CMSE reed or DMSE electronic solid-state sensors mounted into the dual-side extruded aluminum barrel grooves.
With a nominal 950 mm stroke and a 40 mm adjustment range, this SKU provides a usable travel window of 910 to 950 mm. This built-in rear stopper allows you to fine-tune the retract end position during commissioning without adding external stops. The adjuster acts purely as a travel stop and does not hold the load without live air; for pilot-operated locking, consider the SAIL or BSAI series.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-40S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 950 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 SAIJ125X950-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×950 | 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 SAIJ125X950-40S Is Used
Long-Stroke Changeover
Dial in the 910-950 mm travel window during product size changes to set new retract endpoints without physically replacing the cylinder.
Heavy Clamp Positioning
Leverage the 6136 N push force at 0.5 MPa to securely clamp large parts while using the rear screw to fine-tune the final clamping position.
Automated Assembly Lines
Use the dual sensor grooves with DMSE electronic switches to track the carbon steel rod position across extended 950 mm cycles.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X950-40S the Right Cylinder?
Choose this 125 mm bore when an 80 mm bore (delivering 2513 N push at 0.5 MPa) is insufficient, but a 160 mm bore (10053 N) is oversized. The adjustable 910-950 mm window is ideal for product changeovers on long-stroke lines, eliminating the need to swap out a fixed-stroke SAI cylinder. Because the stroke is 950 mm, the long unsupported rod requires an external guide to prevent excessive side-loading and premature seal wear.
To match this ISO 15552 dimensionally interchangeable cylinder, confirm the 125 mm bore, 950 mm stroke, 40 mm adjustment, G1/2 PT port, and -S magnet. Mounting options are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR brackets.
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 SAIJ125X950-40S FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. At 0.7 MPa, the push force increases to 8590 N.
The rear adjuster screw allows you to shorten the effective travel from the 950 mm nominal stroke down to 910 mm. This creates a 910-950 mm usable window for fine-tuning the end position at commissioning without external stops.
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 SAIJ125X950-40S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.