Lab Stirrer Digital Main Body (100~1000 rpm), Stainless Shaft & 75Mm 4-Blade Propeller Overview
The Lab Stirrer Digital Main Body (100~1000 rpm), Stainless Shaft & 75Mm 4-Blade Propeller (model LR500B) is a digital overhead laboratory stirrer from Yamato Scientific, supplied by LabSupplies.com as an authorized dealer. This unit drives medium-viscosity samples across a 100–1000 rpm range with up to 0.98 N·m (10 kgf·cm) of torque.
A gearless direct-drive design transmits power through a ø10 mm stainless shaft, removing gear backlash. The 100 W DC brushless motor pairs with speed feedback control, holding the set speed as sample viscosity shifts. Readouts come from a digital 3-digit speed display, while an LED indicator flags torque load and overload conditions.
Operation runs on a standard 115V supply. Each SET ships with the stirring shaft (ø10 × 500 mm), a 75 mm 4-blade propeller, and a clamp, so the assembly arrives ready to mount. Footprint, weight, and country of origin are listed as Contact for specification.
Key Features
- Speed range: continuous 100–1000 rpm for medium-viscosity samples.
- Speed feedback control: maintains the set speed despite viscosity change during a run.
- Motor and torque: 100 W DC brushless motor delivering up to 0.98 N·m (10 kgf·cm).
- Gearless direct drive: ø10 mm shaft transmits power directly, eliminating gear backlash.
- Digital display: 3-digit speed readout with an LED torque/overload indicator.
- Safety devices: overload stop, current-limit circuit, and thermal motor protection.
How to Choose the Right Stirrer
Matching an overhead stirrer to your workflow comes down to torque, speed behavior, and the control and safety features your protocol requires. Use the criteria below to confirm fit .
- Torque and motor: higher torque handles thicker media; the LR500B 100 W brushless motor provides up to 0.98 N·m for medium-viscosity work.
- Speed range and control: verify the rpm window covers your protocol; speed feedback control holds the setpoint as viscosity shifts.
- Drive type: gearless direct drive reduces backlash and maintenance versus geared transmissions.
- Voltage: confirm the 115V supply matches your bench circuit before ordering.
- Safety devices: overload stop, current-limit, and thermal protection guard the motor and sample during long runs.
- Shaft and impeller: match shaft length and propeller style to your vessel; this set includes a ø10 × 500 mm shaft and 75 mm 4-blade propeller.
Specifications
| Specification | Detail |
|---|---|
| Voltage | 115V |
| Speed Range | 100–1000 rpm |
| Maximum Torque | 0.98 N·m (10 kgf·cm) |
| Motor | DC brushless, 100 W |
| Sample Viscosity | Medium |
| Type | Digital overhead laboratory stirrer |
| Speed Control | Speed feedback control — maintains set speed despite viscosity change |
| Display | Digital 3-digit speed display with LED torque/overload indicator |
| Safety Devices | Overload stop; current-limit circuit and thermal motor protection |
| Drive | Gearless direct drive, ø10 mm shaft |
| Included Accessories | Stirring shaft (ø10 × 500 mm), 75 mm 4-blade propeller, clamp |
Available Sizes and Configurations
| SKU | Configuration | Pack |
|---|---|---|
| LR-500B | SET | SET |
More in This Series
- Lab Stirrer Digital Main Body (34~340 rpm), Stainless Shaft & 75mm 4-Blade Propeller
- LR-500A Set Main Body, Stand, Rod, Stainless Steel Shaft And 75mm 4-Blade Propeller
- LR-500B Set Main Body, Stand, Rod, Stainless Steel Shaft And 75mm 4-Blade Propeller
- LT-500A Set Main Body, Stand, Rod, Stainless Steel Shaft And 60mm 4-Blade Propeller
- LT-500B Set Main Body, Stand, Rod, Stainless Steel Shaft And 60mm 4-Blade Propeller
- Strong Magnetic Stirrer With Hot Plate, 50 To 1600 rpm
View all Laboratory Stirrers →
Why Buy From LabSupplies.com
LabSupplies.com sells the Yamato Scientific LR500B as an authorized dealer, so every unit is a genuine factory product backed by the manufacturer warranty. Our lab-equipment specialists answer spec questions directly and ship from USA inventory.
- Authorized Yamato Scientific dealer: genuine unit with full manufacturer warranty.
- In stock: ready to order now, no backorder wait.
- Ships from USA inventory: domestic fulfillment for faster delivery.
- Lab-equipment specialists: direct support for configuration and spec questions.
Frequently Asked Questions
What is the speed range of the LR500B stirrer?
The LR500B runs continuously from 100 to 1000 rpm. Speed feedback control maintains your setpoint even as sample viscosity changes during a run.
How much torque does the LR500B deliver?
Maximum torque is 0.98 N·m (10 kgf·cm), produced by a 100 W DC brushless motor. This output suits medium-viscosity samples.
Does the LR500B run on a standard 115V circuit?
Yes, the LR500B operates on 115V. Confirm that your bench outlet matches this voltage before installation.
What accessories are included with the LR500B?
Each set includes a stirring shaft (ø10 × 500 mm), a 75 mm 4-blade propeller, and a clamp. The unit arrives ready to mount.
What drive system does this stirrer use?
The LR500B uses a gearless direct drive with a ø10 mm shaft. Direct transmission eliminates gear backlash and reduces maintenance.
What safety features protect the motor during long runs?
Safety devices include an overload stop, a current-limit circuit, and thermal motor protection. An LED indicator also signals torque load and overload.
