Airtac SAIJ125 Adjustable Cylinder SAIJ125X900-100S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X900-100S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 900mm 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
- Stroke900 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X900-100S
The AirTAC SAIJ125X900-100-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 6136N of pull force at 0.5MPa and 8590N at 0.7MPa, making it a robust choice for heavy-duty positioning. The integrated -S magnet supports CMSE reed and DMSE electronic sensors via the dual-side barrel grooves.
This specific SKU features a 900mm nominal stroke with a 100mm adjustment range, creating an 800-900mm usable travel window. The external rear stopper allows you to fine-tune the retract end-position during commissioning or product changeovers without swapping the cylinder or adding external stops. The adjuster acts purely as a travel stop, so live air is still required to hold the load.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X900-100S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X900-100S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 900 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 SAIJ125X900-100S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×900 | 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 SAIJ125X900-100S Is Used
Heavy Product Changeovers
Dial in the 800-900mm retract stop for varying large product sizes on a single line without mechanical rebuilds.
Long-Stroke Diverting
Handles heavy pallet routing on extended conveyors where exact end-position tuning prevents impact damage.
Assembly Press Setup
Fine-tune the end-stop during machine commissioning to perfect the pressing depth of heavy components.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X900-100S the Right Cylinder?
Choose this 125mm bore when you need significantly more force than a 100mm bore offers, which provides 3681N of pull force at 0.5MPa. The 900mm stroke exceeds typical standard lengths but remains within the 1500mm maximum for this bore. Because the stroke is 900mm, the 32mm carbon steel rod and M27x2 thread will still experience leverage forces; an external guide is recommended to prevent excessive side-loading on the piston.
The adjustable 800-900mm window is ideal for machines running multiple product sizes. When matching an ISO 15552 replacement, verify the 125mm bore, 900mm stroke, 100mm adjuster, PT tapered port, and the -S magnet. For load-holding without continuous air pressure, select a SAIL or BSAI series cylinder instead, as this adjuster is not a lock.
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 SAIJ125X900-100S FAQ
At 0.5MPa it provides 6136N of pull force and 5734N of push force. At 0.7MPa, the push force increases to 8590N.
The rear adjuster lets you shorten the 900mm stroke by up to 100mm, creating an 800-900mm travel window. It functions as a mechanical stop for end-position tuning, not a load-holding lock.
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