Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-10
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 145mm 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
- Stroke145 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-10
The AirTAC SAIJ125X145-10 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel back by up to 10 mm. This creates a precise 135-145 mm usable stroke window, enabling exact end-position tuning during commissioning without swapping out the cylinder or adding external stops. It delivers substantial thrust, providing 6136 N push and 5734 N pull force at 0.5 MPa, making it well suited for heavy-duty positioning tasks.
This model features a SUS420J2 stainless steel rod (material code A) paired with a PT tapered port thread. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic switches if a magnet is specified later. It uses a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting the FB, CA, CB, and CR brackets found on some standard variants.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-10 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 145 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 SAIJ125AX145-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×145 | 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 SAIJ125AX145-10 Is Used
Machine Setup Tuning
Dial in the exact 135-145 mm end position during initial commissioning to align heavy stamping or clamping fixtures without machining external stopper blocks.
Product Changeover
Quickly adjust the retract stop by up to 10 mm when switching between product sizes on a packaging line, reducing downtime and avoiding cylinder swaps.
Heavy Load Positioning
Leverage the 6136 N push force at 0.5 MPa to move heavy pallets or chassis components, using the rear screw to fine-tune the resting position.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX145-10 the Right Cylinder?
Select this 125 mm bore when your application requires high force, as it yields 6136 N push force at 0.5 MPa. If your load demands less thrust, stepping down to a 100 mm bore provides 3927 N, whereas moving up to a 160 mm bore offers 10053 N. The adjustable stroke is ideal for product changeovers or fine-tuning the end stop on the fly, a major advantage over a fixed-stroke SAI cylinder. Keep in mind the rear adjuster acts purely as a travel stop and does not hold the load without live air pressure; for true load-holding, consider an AirTAC SAIL or BSAI cylinder, or an external rod lock.
When replacing an ISO 15552 cylinder, match the 125 mm bore, 145 mm stroke, 10 mm adjustment range, PT G1/2 port, and the appropriate mounting bracket. Because the stroke exceeds 300 mm threshold rules do not apply here, but the 32 mm rod and M27x2 thread provide robust resistance to side loads, though external guides are still recommended for heavy off-center loads.
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 SAIJ125AX145-10 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 0.9 MPa, the push force increases to 11045 N.
The rear adjuster screw acts as a mechanical stop that lets you shorten the 145 mm nominal stroke by up to 10 mm, providing a usable travel window of 135-145 mm. It only sets the travel end and does not lock the load without live air pressure.
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