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.
