Airtac SAIJ125 Adjustable Cylinder SAIJ125X25-20
The AirTAC SAIJ125 Adjustable Cylinder SAIJ125X25-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 25mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ125 mm
- Stroke25 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 SAIJ125X25-20
It features a carbon steel piston rod and PT tapered port threads. By integrating an external adjusting screw, this model provides a usable travel window of 5 to 25mm, allowing you to dial in the exact retract end-position during commissioning without adding external stops.
This adjustable-stroke design is ideal for short-stroke, high-force applications requiring precise positioning. The extruded aluminum barrel includes sensor grooves on both sides, supporting AirTAC CMSE reed and DMSE electronic sensors when a magnet is specified. The rear adjuster functions strictly as a travel stop to set the deceleration point and does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X25-20 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X25-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 25 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 | 5734 N | 5734 N |
| 0.7 MPa | 8027 N | — |
| Max (@1.0 MPa) | 1169 kgf | |
Double-rod model: the rod passes through the rear cover, so both piston faces lose rod area and push is shown at the annular-area value. Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ125 Adjustable Cylinder SAIJ125X25-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×25 | 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 SAIJ125X25-20 Is Used
Machine Setup Tuning
The rear adjusting screw allows operators to dial in the retract end-position during commissioning without swapping cylinders or adding external stopper blocks.
Product Changeover
Quickly adjust the effective stroke by up to 20mm on automated lines to accommodate slight variations in product dimensions or tooling heights.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X25-20 the Right Cylinder?
Choose this 125mm bore cylinder when an application demands high thrust within a very short travel distance, specifically a 5 to 25mm adjustable window. Select the SAIJ adjustable version over a fixed-stroke SAI cylinder when you anticipate needing end-position tuning during machine setup or product changeovers. To match this ISO 15552 interchangeable cylinder for a replacement, verify the 25mm stroke, 20mm adjustment range, PT port thread, and mounting choice (Basic, FA, LB, TC, FTC, TCM1, or TCM2). Remember that the rear adjuster is a stop, not a lock; for load-holding without live air, 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 SAIJ125X25-20 FAQ
The rear adjuster acts as a mechanical stop that shortens the effective stroke by up to 20mm. With a nominal 25mm stroke, this creates a usable travel window of 5 to 25mm. It only sets the travel end and does not lock or hold the load without continuous air pressure.
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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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