Airtac SAIJ125 Adjustable Cylinder SAIJ125AX115-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX115-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 115mm 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
- Stroke115 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX115-100
The AirTAC SAIJ125X115-100 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a vast adjustable travel window from 15 to 115 mm, allowing you to dial in the exact retract end-position during commissioning without adding external stops. Equipped with a SUS420J2 stainless steel rod (code A) and PT tapered ports, it handles heavy loads with 6136N push force at 0.5 MPa.
The extruded aluminum barrel includes sensor grooves on both sides for tracking travel. Speeds range from 30 to 500 mm/s, and the mounting set covers Basic, FA, LB, TC, FTC, TCM1, and TCM2. The rear stopper and air cushion decelerate the load but do not hold it without live air; for position holding, use a SAIL or BSAI cylinder.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX115-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX115-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 115 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 SAIJ125AX115-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×115 | 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 SAIJ125AX115-100 Is Used
Variable End-Stop Machining
Dial in the retract stroke from 15 to 115 mm on the shop floor to accommodate changing part dimensions without swapping out the entire cylinder.
Product-Size Changeovers
Rapidly adapt packaging or handling machinery to new product sizes by turning the rear adjuster screw, saving hours of mechanical reconfiguration.
Commissioning Fine-Tuning
Perfect the final end-position during machine setup, compensating for mechanical tolerances without bolting on external stopper blocks.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX115-100 the Right Cylinder?
Select this 125mm bore cylinder when an application requires substantial thrust (6136N at 0.5 MPa, up to 11045N at 0.9 MPa) alongside a highly variable end-stop. If your force needs are lower, stepping down to an 80mm bore yields 2513N at 0.5 MPa. The 100mm adjustment range is ideal for product-size changeovers on a line. To replace this ISO 15552 unit, match the 125mm bore, 115mm stroke, 100mm adjust, PT G1/2 ports, and mounting style. Note: a magnet (-S) is not specified for this configuration.
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 SAIJ125AX115-100 FAQ
At 0.5 MPa operating pressure, this 125mm bore cylinder provides 6136N of push force and 5734N of pull force. At 0.9 MPa, the push force increases to 11045N.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective travel from the 115mm nominal stroke down to 15mm. It sets the end-position but does not lock the load without live air pressure.
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