The Yamato LT-400BA is the complete-set configuration of the LT-400B overhead stirrer — the LT-400B main body plus the stand, rod, stainless-steel shaft and 60 mm 4-blade propeller packaged ready to run. It is the same balanced speed/torque, middle-viscosity overhead stirrer (15–600 rpm, 0.5 N·m, 35 W brushless motor) delivered as a turn-key rig rather than a bare main body.
Key Specifications
| SKU | LT-400BA |
| Type | Overhead (top-drive) laboratory stirrer — complete set |
| Application | Middle-viscosity samples |
| Speed range | 15–600 rpm |
| Rated torque | 0.5 N·m (5.0 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-400B 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-400B ($857.50) |
| List price | $1,845.00 |
Notes: stirrer, shaft and 60 mm propeller are itemized in the manual; the stand/rod correspond to Yamato's Y-type rack (25 mm x 725 mm) — confirm the exact part in the set with Yamato. The manual prints the LT-400B torque as "0.5 N·m (6.0 kgf·cm)," which is internally inconsistent (0.5 N·m ≈ 5.1 kgf·cm); the 0.5 N·m figure is used.
Application Profile
- Middle-viscosity mixing, turn-key — balanced speed/torque for everyday solutions and moderate suspensions, 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-400BA when overhead drive is needed at a balanced speed/torque point as a complete rig. Step to the LT-400AA (10–300 rpm, 0.9 N·m) for thicker samples or the LT-400CA (25–1200 rpm) for thinner samples.
Design Architecture
The LT-400BA is the LT-400B 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. 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-400BA complete set include? The LT-400B 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 — a ready-to-run rig.
What speed and torque does it deliver? 15–600 rpm at 0.5 N·m from a 35 W DC brushless motor with feedback control — a balanced speed/torque point suited to middle-viscosity samples.
How is the LT-400BA different from the LT-400B? Same drivetrain; the LT-400BA adds the stand, rod, shaft and propeller. Choose the LT-400B main body alone when a stand already exists.
When should I step to the LT-400AA or LT-400CA instead? Choose the LT-400AA (10–300 rpm, 0.9 N·m) for thicker, higher-viscosity samples, or the LT-400CA (25–1200 rpm) for thinner samples needing more speed.
What voltage does it use? 100–120V only — there is no 220V variant in the source.
Ordering & Configuration
In the box: LT-400B 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-400BA is a direct add-to-cart complete set. Choose over the LT-400B 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) · LT-400BA (15–600 rpm, this product) · LT-400CA (25–1200 rpm). Main bodies only: LT-400A / B / C.
