Airtac SAIJ125 Adjustable Cylinder SAIJ125AX250-30
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125AX250-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 250mm 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
- Stroke250 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 SAIJ125AX250-30
The AirTAC SAIJ125X250-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 220-250 mm usable travel window. Delivering 6136 N of push force at 0.5 MPa, it handles heavy actuation while allowing precise end-position tuning during commissioning. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
This model uses a SUS420J2 stainless steel rod for improved corrosion resistance and features PT tapered port threads. The rear adjustment screw acts purely as a mechanical stop to fine-tune the retract position without requiring external stops, while the standard air cushions manage end-of-stroke deceleration.
Airtac SAIJ125 Adjustable Cylinder SAIJ125AX250-30 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125AX250-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 250 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 SAIJ125AX250-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×250 | 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 SAIJ125AX250-30 Is Used
Product Changeover
Dial in the 220-250 mm stroke window during format size changes on packaging lines without swapping hardware.
Machine Setup
Fine-tune the exact retract end-position during commissioning to achieve precise mechanical alignment.
Variable End Stops
Adjust the mechanical stop point on the fly for heavy-duty forming or clamping stations requiring 6136 N of force.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125AX250-30 the Right Cylinder?
Choose this 125 mm bore when a 100 mm cylinder (providing 3927 N push at 0.5 MPa) lacks thrust, but a 160 mm bore (10053 N) is excessive. The 30 mm adjustment window is ideal for applications requiring variable end-stops or product-size changeovers, avoiding the need to physically swap cylinders compared to a fixed-stroke SAI. Remember that the adjuster is a travel stop, not a lock; for load-holding without live air pressure, consider an AirTAC SAIL or BSAI cylinder.
To match this ISO 15552 footprint for a direct replacement, confirm the 125 mm bore, 250 mm stroke, PT port threads, SUS420J2 rod material, and the required mounting style from the available SAIJ set: Basic, FA, LB, TC, FTC, TCM1, or TCM2. Because the stroke is under 300 mm, side-load risks are moderate, but 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 SAIJ125AX250-30 FAQ
At 0.5 MPa operating pressure, this 125 mm bore cylinder provides 6136 N of push force and 5734 N of pull force. It can deliver up to 8590 N push at 0.7 MPa.
The rear adjuster screw allows you to shorten the effective stroke by up to 30 mm, creating a 220-250 mm travel window. It functions as a mechanical stop for position tuning and does not lock the load without live air.
Authorized Export Seller
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
Request a Quote for Airtac SAIJ125 Adjustable Cylinder SAIJ125AX250-30
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.