Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-40
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 220mm 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
- Stroke220 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-40
The AirTAC SAIJ125X220-40 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, enabling a usable travel window of 180 to 220 mm. Built with an extruded aluminum barrel, it delivers a robust 6136 N pull force at 0.5 MPa and operates at speeds of 30-500 mm/s. The PT G1/2 port and 32 mm carbon steel rod provide a solid interface for heavy-duty positioning.
This model allows technicians to dial in the exact retract end-position during commissioning without swapping the cylinder or adding external stops. It supports AirTAC CMSE reed and DMSE electronic sensors via dual side grooves, and uses a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-40 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 220 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 SAIJ125X220-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×220 | 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 SAIJ125X220-40 Is Used
Variable End-Stop Tuning
Dial in the retract position precisely during machine setup, trimming up to 40 mm off the 220 mm stroke to accommodate different product sizes without changing hardware.
Machine Changeover
Quickly adapt automated lines to new product batches by adjusting the rear stopper, saving downtime compared to physically swapping out a fixed-stroke cylinder.
Heavy-Duty Positioning
Leverage the 6136 N pull force to move heavy pallets or tooling, using the fine adjustment to perfect the stopping location at the end of the travel window.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X220-40 the Right Cylinder?
Choose this 125 mm bore when the 80 mm class (2268 N pull at 0.5 MPa) is insufficient, but the 160 mm bore (9425 N pull at 0.5 MPa) would be physical overkill. The 40 mm adjustment window is ideal for product changeovers where the exact end-stop varies slightly between batches, replacing the need for fixed-stroke SAI cylinders that lock you into one dimension.
For any stroke at or above 300 mm, you must account for side loading; while this 220 mm stroke is shorter, the 32 mm rod thread still handles high axial loads. Remember that the rear adjuster acts only as a travel stop, not a lock; the cylinder will not hold its load without live air. For true position holding, specify a SAIL or BSAI series cylinder instead. To match this ISO 15552 replacement exactly, verify the 125 mm bore, 220 mm stroke, 40 mm adjuster, PT G1/2 port, and standard carbon steel rod.
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 SAIJ125X220-40 FAQ
At 0.5 MPa, this 125 mm bore cylinder provides 6136 N of pull force and 8590 N of push force. It can deliver a maximum of 1251 kgf at 1.0 MPa.
The rear adjuster acts as a mechanical stop that lets you shorten the effective travel from the 220 mm nominal stroke down to 180 mm. It fine-tunes the end position but does not lock the load without live air pressure.
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