Airtac SAIJ125 Adjustable Cylinder SAIJ125BX800-100
The AirTAC Airtac SAIJ125 Adjustable Cylinder SAIJ125BX800-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø125mm bore and 800mm 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
- Stroke800 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 SAIJ125BX800-100
The AirTAC SAIJ125X800-100 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. With a nominal 800 mm stroke and a 100 mm adjustment range, it provides a usable travel window of 700 to 800 mm. This built-in stopper allows you to fine-tune the retract end position at commissioning without swapping out the entire cylinder or adding external physical stops. Delivering a robust 11045 N of pull force at 0.9 MPa, it is built for heavy-duty positioning.
This variant features a SUS304 stainless steel rod for superior corrosion resistance and ships with PT tapered ports. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement. It supports speeds of 30-500 mm/s and uses the standard SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting the FB, CA, CB, and CR brackets. Note that the rear adjuster acts only as a travel stop to set deceleration; it does not hold the load without live air pressure.
Airtac SAIJ125 Adjustable Cylinder SAIJ125BX800-100 Technical Specifications
| Model | Airtac SAIJ125 Adjustable Cylinder SAIJ125BX800-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 800 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 SAIJ125BX800-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 125 | Bore size in mm. |
| ×800 | 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 SAIJ125BX800-100 Is Used
Variable End-Stop Tuning
Dial in the exact retract position within the 700-800 mm window during machine setup, avoiding the need to machine custom external hard stops for each new product size.
Product Changeover Systems
Quickly adjust the stroke on packaging or sorting lines to handle different package lengths, utilizing the 100 mm adjustment range without changing the cylinder.
Heavy-Duty Positioning
Leverage the 11045 N pull force at 0.9 MPa to move heavy pallets or fixtures, relying on the fine-tuning capability to ensure precise end-of-stroke placement.
Is the Airtac SAIJ125 Adjustable Cylinder SAIJ125BX800-100 the Right Cylinder?
Choose this 125 mm bore adjustable-stroke cylinder when your application requires high thrust—up to 11045 N at 0.9 MPa—combined with variable end-stop positioning. The 100 mm adjustment window is ideal for product changeovers on a line, letting you dial in the exact travel without machining new hard stops. If your force requirements are lower, stepping down to a 100 mm bore provides 7068 N at 0.9 MPa, which may save space and air consumption.
Because the 800 mm stroke is long, the 32 mm rod and M27x2 thread will still experience leverage forces; an external guide is recommended to prevent side-loading damage. As an ISO 15552 interchangeable profile cylinder, it matches standard mounting dimensions. For load-holding without live pressure, select a SAIL or BSAI series cylinder instead, as the SAIJ adjuster is a stop, not a lock. Configure with PT ports, no magnet, and the SUS304 (B) rod material.
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 SAIJ125BX800-100 FAQ
At 0.9 MPa operating pressure, this 125 mm bore cylinder generates 11045 N of pull force and 8590 N at 0.5 MPa. It delivers 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 nominal 800 mm down to 700 mm. This creates a 700-800 mm usable window for fine-tuning end positions without replacing the cylinder.
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