Spindle Balancer

Spindle Balancer

Single-plane spindle balancing on your phone: the influence-coefficient method gives you the exact correction weight and angle. Everything in the Analyzer, plus an integrated tachometer.

GrayVolt Vibration Analyzer beside the chuck of a JET lathe
Actual installation Analyzer beside the spindle The real enclosure, status LED, and cable connections shown in place on a working lathe.
New
Spindle Balancer

Everything in the Analyzer, plus integrated tachometer and automatic balancing algorithm. Tells you exactly how much weight to add and where.

  • Everything in the Vibration Analyzer
  • Integrated IR tachometer sensor
  • Automatic influence coefficient balancing
  • Sub-2.5 mm/s residual imbalance achievable
  • Phase accuracy ±2 to 3°
  • Includes tach sensor + 3.5mm cable
$199 one-time / complete kit
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VISAMASTERCARDAMEXAPPLE PAYGOOGLE PAYLINK
Direct only for now, Amazon coming soon
Free US shippingFulfilled by GrayVolt · Ships within 3 days
1-year warrantyWe repair or replace

Already own the Analyzer? Don't buy this. Your hardware is identical: get the $100 Upgrade Kit instead and enable balancing on the unit you already have. It does the same job and costs $99 less.

How It Works

Three runs. Balanced.

The single-plane influence-coefficient method, automated end to end: no spreadsheets, no vector math by hand.

Baseline run

Bring the spindle to speed. The Balancer measures the 1× vibration amplitude and phase using the IR tach as reference.

Trial weight

Add a known trial weight and run again. The tool learns exactly how the rotor responds to mass.

Solve & verify

The Balancer outputs the exact correction weight and angle. Add it, run once more to confirm sub-2.5 mm/s.

Real Balance Run

Watch the full balancing workflow.

See the GrayVolt Balancer, optical tach, and browser interface work together from the baseline measurement through the calculated correction. The run shown reduced 1× vibration from 0.0252 g to 0.0029 g.

60-second walkthrough Dial indicator stand 88% reduction shown

Silent with on-screen guidance · Results vary by machine and setup

See it in action

The balancing wizard, live.

This is the actual on-device interface: drag inside the polar to mark a trial weight and step through a real single-plane balance, right here in your browser.

http://gv-####.local/#balance
Balance · interactive
Speed 4,002 RPM Tach locked
Initial 1× 0.0252 g 23.5 degree phase
Correction 1.14 g Place at 37.0 degrees
Verified 1× 0.0029 g 88.5% reduction
Drag inside the polar to mark a trial position. Step through the wizard at the top.
Open the full demo ↗ SYNTHETIC DATA · MIRRORS THE CURRENT DEVICE WORKFLOW
No App. No Problem.

Just your phone's
built-in browser.

Power the sensor. It spins up its own WiFi network. Connect, and your phone's captive portal pops open the measurement dashboard automatically. Same flow you already know from hotel WiFi.

01
Plug the sensor into USB-C power
02
Open WiFi settings → connect to "GV-XXXX"
03
Portal opens. You are measuring.
Comparison

The $2,150 tool does this by hand.

Premium capability at a fraction of the cost. No laptop, no desktop software, no subscription fees.

Feature GrayVolt Balanset-1A EVB-01
Price$99 to $199$2,150$184
Spindle BalancingAutomaticManual setupNot supported
Tach SensorIntegratedSeparate laserNone
Software RequiredPhone browser, local. Optional MQTT exportWindows PCBrowser/cloud
Setup Time< 5 minutes15 to 30 minutesN/A
Sample Rate6,660 HzNot specified6,660 Hz
MountingMagnetic + tapeAdhesive + clampsAdhesive tape

Competitor prices and specs as published by their manufacturers, August 2026.

Technical Specifications

Built for precision.

Industrial-grade components in a package smaller than a matchbox. Every spec chosen with purpose.

ASM330LHH
6-Axis IMU
6,660 Hz
Max Sample Rate
16-bit
Resolution
±16g
Accelerometer Range
75 µg/√Hz
Noise Density
ESP32
Dual-Core 240 MHz
WiFi 2.4G
Captive Portal
USB-C
5V Power Input
21 × 33 mm
PCB Dimensions
Anatomy

Every component, chosen with purpose.

A compact WiFi vibration analyzer built for machine tools. Every part is here because it has to be: nothing extra, nothing missing.

GrayVolt sensor, transparent x-ray view
3.5 mm Tach Port
IR sensor for phase reference
USB-C Power
5V · any phone charger
ESP32 MCU
Dual-core · WiFi · web server
ASM330LHH IMU
6-axis · 6.66 kHz · ±16g
SLA-Printed Shell
Tough 1500 resin · magnetic base
3.5 mm Tach Port
IR sensor for phase reference
USB-C Power
5V · any phone charger
ESP32 MCU
Dual-core · WiFi · web server
ASM330LHH IMU
6-axis · 6.66 kHz · ±16g
SLA-Printed Shell
Tough 1500 resin · magnetic base
35 × 24 × 14
mm Enclosure
4
Layer FR-4
ESP32
WROOM-E
6-axis
IMU + Gyro
Applications

Balance anything that spins.

Single-plane correction for the rotating parts where imbalance wrecks finish, tools, and bearings.

CNC Spindles

Kill 1× vibration for better surface finish, longer tool life, and quieter bearings.

Grinding Wheels

Balance wheels in place for cleaner grinds, less burn, and tighter tolerances.

Fans & Blowers

Field-balance HVAC and process fans single-plane, no need to pull them from the duct.

Tool Holders & Fixtures

Balance holders, arbors, and rotating fixtures to spec for high-RPM work.

Get Started

Stop guessing.
Start balancing.

Free shipping to the US and Canada, a 1-year warranty, and secure Stripe checkout.

Read the guide