The Yamato LT-400C is a compact overhead (top-drive) laboratory stirrer main body configured for high-speed mixing of middle-to-low-viscosity samples — 25–1200 rpm at a rated 0.3 N·m (3.0 kgf·cm), the fastest / lowest-torque build in the LT-400 series. A maintenance-free DC brushless motor with feedback control holds the set speed as viscosity changes during a stir. Sold as the main body; the LT-400CA adds the stand, rod, shaft and propeller as a complete set.
Key Specifications
| SKU | LT-400C |
| Type | Overhead (top-drive) laboratory stirrer — main body only |
| Application | Middle-to-low-viscosity samples (high speed) |
| Speed range | 25–1200 rpm |
| Rated torque | 0.3 N·m (3.0 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 |
| Power cord | 3-pin plug, 2 m |
| External dimensions | W146 x D154 x H165 mm |
| Weight | 2.4 kg |
| Included | Clamp holder, safety cover, chuck handle, operating manual, warranty card |
| Complete set SKU | LT-400CA (adds stand + rod + shaft + 60 mm propeller) |
| List price | $1,225.00 |
Application Profile
- Higher-speed mixing of thinner samples — solutions, dilute suspensions and dispersions that benefit from rpm up to 1200.
- General-purpose overhead stirring — top-driven mixing for vessels a magnetic stir bar cannot serve.
- Quiet-bench operation — noise-prevention design for shared and instrument-sensitive labs.
- Routine synthesis and prep — a light, economical high-speed overhead unit.
Overhead vs magnetic — pick the LT-400C when overhead drive is needed at higher speed for low-to-middle viscosity work. Step down to the LT-400B (15–600 rpm) or LT-400A (10–300 rpm, 0.9 N·m) as viscosity rises and torque, not speed, becomes the constraint.
Design Architecture
A 35 W DC brushless motor (B-type insulation) drives a ø8 mm SUS drill chuck through a feedback control loop that keeps the set speed steady as viscosity changes mid-stir. Speed and load appear on a 4-digit digital readout with overload indication and a torque indicator graduated in 20% steps.
Protection is layered: a current-limiting circuit throttles current when load exceeds maximum torque, and a thermal protector cuts motor current at a 110 °C coil temperature (recovery after ~30 min cooldown). A safety cover guards the rotating chuck. Because the LT-400C is the lowest-torque / highest-speed build, applying it to a genuinely viscous sample will trip the overload sooner than the LT-400A/B would. Housed in a 2.4 kg aluminum die-cast body (W146 x D154 x H165 mm) on 100–120V, 200VA.
Frequently Asked Questions
What speed range does the LT-400C reach? The LT-400C runs 25–1200 rpm at a rated 0.3 N·m (3.0 kgf·cm) — the fastest, lowest-torque build in the LT-400 series, configured for high-speed mixing of middle-to-low-viscosity samples.
Does the LT-400C come with a stand and propeller? No. The LT-400C is sold as the main body only; a stand, rod, stirring shaft and propeller are required to operate and are sold separately. Order the LT-400CA set to include the stand, rod, shaft and 60 mm propeller.
Is the LT-400C available in 220V? No. The LT-400C is supplied for single-phase 100–120V only; there is no 220V variant in the source.
How does the LT-400C hold speed as viscosity changes? A maintenance-free DC brushless motor (35 W) with a feedback control loop keeps the set speed steady as viscosity changes mid-stir, with a 4-digit digital readout and a torque indicator graduated in 20% steps.
When should I choose the LT-400C over the LT-400A or LT-400B? Pick the LT-400C when you need overhead drive at higher speed for low-to-middle viscosity work; step down to the LT-400B (15–600 rpm) or LT-400A (10–300 rpm, 0.9 N·m) as viscosity rises and torque becomes the constraint.
Ordering & Configuration
In the box: LT-400C main body, clamp holder, safety cover, chuck handle, operating manual and warranty card. A stand, rod, stirring shaft and propeller are required to operate and are sold separately — order the LT-400CA set to include them, or add the accessories individually (Y-shaped rack 231086; ø8 x 500 mm shaft 231384; 60 mm 4-blade propeller 231076; other propeller sizes available).
At $1,225.00 the LT-400C is a direct add-to-cart benchtop unit. It is a main body only — confirm you have (or are ordering) a stand, rod, shaft and propeller. Supply is 100–120V only; no 220V variant in the source.
Warranty: one year from purchase per Yamato terms (repair-parts holding period 7 years after end of production).
LT-400 series: LT-400A (10–300 rpm) · LT-400B (15–600 rpm) · LT-400C (25–1200 rpm, high speed, this product). Complete sets: LT-400AA / -BA / -CA.
