The Yamato LT-400AA is the complete-set configuration of the LT-400A overhead stirrer, the LT-400A main body plus the stand, rod, stainless-steel shaft and 60 mm 4-blade propeller packaged ready to run. It is the same high-torque, low-speed overhead stirrer (10–300 rpm, 0.9 N·m / 9.0 kgf·cm, 35 W brushless motor) delivered as a turn-key rig rather than a bare main body.
Key Specifications
| SKU | LT-400AA |
| Type | Overhead (top-drive) laboratory stirrer: complete set |
| Application | High-viscosity samples |
| Speed range | 10–300 rpm |
| Rated torque | 0.9 N·m (9.0 kgf·cm) |
| Motor | DC brushless, B-type insulation, 30 W output |
| Rotation control | Feedback control |
| Panel | 4-digit digital speed, overload indication, torque indicator (20% per scale) |
| Chuck | SUS drill chuck for ø8 mm shaft |
| Safety | Current-limiting circuit, thermal protector (motor coil 110 °C), safety cover |
| Power source | Single phase 100–120V ±10%, 50/60 Hz, 200VA |
| External dimensions (main body) | W146 x D154 x H165 mm |
| Included | LT-400A main body, stand, rod, stainless-steel stirring shaft (ø8 x 500 mm), 60 mm 4-blade propeller, clamp holder, safety cover, chuck handle, operating manual, warranty card |
| Main-body-only SKU | LT-400A ($857.50) |
| List price | $1,845.00 |
Author confidence note: stirrer, shaft (ø8 x 500 mm) and 60 mm propeller are itemized in the manual's accessory list. The stand and rod correspond to Yamato's Y-type rack (25 mm x 725 mm) per the manual; confirm the exact stand/rod part supplied in the set with Yamato at order.
Application Profile
- High-viscosity mixing, turn-key. Thick solutions and slurries where torque governs the stir, delivered mounted-ready with stand and rod.
- Overhead stirring of small-to-mid vessels. Top-driven mixing where a magnetic stir bar cannot couple.
- Quiet-bench operation. Noise-prevention design for shared labs.
Overhead vs magnetic. Pick the LT-400AA when the sample is too viscous for a magnetic stir bar and you want a complete stand-mounted rig out of the box. For higher speed at lower torque, see the LT-400BA (15–600 rpm) and LT-400CA (25–1200 rpm).
Design Architecture
The LT-400AA is the LT-400A drivetrain on a stand. A 35 W DC brushless motor turns a ø8 mm SUS drill chuck through feedback control that holds the set speed as viscosity changes mid-stir, delivering 0.9 N·m to the sample. Load and speed show on a 4-digit digital readout with overload indication and a 20%-graduated torque indicator.
Protection layers a current-limiting circuit, a thermal protector (110 °C coil cutoff, ~30 min recovery) and a safety cover over the rotating chuck. The included stand, rod, 500 mm stainless shaft and 60 mm 4-blade propeller provide the mounting and wetted-end the bare main body lacks.
Frequently Asked Questions
What does the LT-400AA complete set include? The LT-400A main body plus the stand, rod, stainless-steel stirring shaft (ø8 × 500 mm), 60 mm 4-blade propeller, clamp holder, safety cover, chuck handle, manual and warranty card.
What speed and torque does it deliver? 10–300 rpm at 0.9 N·m (9.0 kgf·cm) from a 35 W DC brushless motor with feedback control, a high-torque, low-speed point for high-viscosity samples.
How is the LT-400AA different from the LT-400A? Same drivetrain; the LT-400AA adds the stand, rod, shaft and propeller. Choose the LT-400A main body alone when a stand already exists.
When should I choose a different LT-400 set? Step to the LT-400BA (15–600 rpm) or LT-400CA (25–1200 rpm) when the sample is thinner and needs higher speed at lower torque.
What voltage does it use? 100–120V only. There is no 220V variant in the source.
Ordering & Configuration
In the box: LT-400A main body, stand, rod, stainless-steel stirring shaft (ø8 x 500 mm), 60 mm 4-blade propeller, clamp holder, safety cover, chuck handle, operating manual and warranty card, a complete stand-mounted stirring rig.
Optional accessories: alternate propellers (40 mm, 75 mm, 100 mm two-blade, turbine/disc types), glass blade, narrow-port blades, all sold separately.
At $1,845.00 the LT-400AA is a direct add-to-cart complete set. Choose over the LT-400A main body ($857.50) when no stand exists. Supply is 100–120V only; no 220V variant in the source. Confirm propeller size against vessel geometry.
Warranty: one year from purchase per Yamato terms.
LT-400 sets: LT-400AA (10–300 rpm, this product) · LT-400BA (15–600 rpm) · LT-400CA (25–1200 rpm). Main bodies only: LT-400A / B / C.
