Airtac SAIJ125 Adjustable Cylinder SAIJ125X150-50S
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125X150-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 150mm 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
- Stroke150 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2
- CushionAdjustable, 40 mm
About the Airtac SAIJ125 Adjustable Cylinder SAIJ125X150-50S
The AirTAC SAIJ125X150-50-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It features a 125 mm bore generating 6136 N of push force at 0.5 MPa, paired with a 150 mm nominal stroke that can be fine-tuned down by up to 50 mm. This yields a usable travel window of 100 to 150 mm, allowing operators to dial in the exact end position during commissioning without swapping out the entire actuator.
Fitted with a magnet for position sensing, this unit triggers AirTAC CMSE reed and DMSE electronic solid-state switches housed within the dual sensor grooves on the extruded aluminum barrel. The PT-tapered G1/2 port and robust 32 mm carbon steel rod with an M27x2 thread handle substantial loads, while the standard variable air cushions decelerate the mass at the travel ends.
Airtac SAIJ125 Adjustable Cylinder SAIJ125X150-50S Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125X150-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 150 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 SAIJ125X150-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×150 | 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 SAIJ125X150-50S Is Used
Product Size Changeovers
Quickly modify the effective stroke from 100 to 150 mm on packaging lines to handle varying carton sizes without changing the cylinder.
Machine Setup Calibration
Fine-tune the retract end position during initial commissioning to achieve precise mechanical alignment without adding external stops.
Heavy Material Handling
Leverage the 6136 N push force at 0.5 MPa to shift heavy workpieces while using the rear screw to set exact clamping reach.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125X150-50S the Right Cylinder?
Choose this 125 mm bore when a 100 mm bore falls short on power, delivering only 3927 N of push force at 0.5 MPa compared to the 6136 N provided here. The adjustable stroke is selected over a fixed SAI model when a machine requires variable end-stops to accommodate frequent product-size changeovers. Remember that the rear adjuster acts strictly as a travel stop and does not hold the load without live air; for true pneumatic locking without pressure, consider an AirTAC SAIL or BSAI cylinder.
For a direct ISO 15552 replacement match, ensure the 125 mm bore, 150 mm stroke, 50 mm adjustment, G1/2 PT port, and -S magnet are specified. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the 150 mm stroke approaches the mid-range for this bore size, ensure external guiding is used if the application induces significant side 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 SAIJ125X150-50S 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 allows you to shorten the 150 mm nominal stroke by up to 50 mm, creating a usable travel window of 100 to 150 mm. The adjuster acts as a mechanical stop to set the end position and is not a locking device.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SAI Cylinders
Request a Quote for Airtac SAIJ125 Adjustable Cylinder SAIJ125X150-50S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.