25,30,37MM NUMBER KNOB

Professional Dial Number Knobs EO-015 to EO-017 Aluminum Series 

The EO-015 Series features high-precision control knobs designed for equipment requiring accurate numerical referencing, such as vintage-style amplifiers, laboratory instruments, and industrial machinery. Each knob combines a tactile ribbed grip with a permanent 0–10 graduated scale on a wide aluminum base for clear, reliable adjustments.

Product Breakdown (By Base Diameter)

1. EO-015 25mm Precision Dial

• Application: Perfect for compact pedals, modular synthesizers, and small-scale electronic projects where space is limited but precise setting tracking is necessary.

• Design: Compact 25mm base diameter with a high-contrast black ribbed body and brushed metal top.

2. EO-016 30mm Standard Dial

• Application: The versatile "standard" size for professional audio mixers, guitar amp heads, and testing equipment.

• Design: A balanced 30mm footprint that provides a larger numerical scale for easier reading at a distance.

3. EO-017 37mm Large-Format Dial

• Application: Designed for main master volume controls or primary industrial power settings requiring maximum visibility and leverage.

• Design: The largest in the series at 37mm, featuring a wide aluminum skirt for highly visible 0–10 numbering.

Key Performance Features

• Graduated Numerical Scale: Each knob features a clear, permanent 0–10 scale printed on a beveled aluminum base, allowing for repeatable and accurate setting recalls.

• Aluminum Top & Skirt: Reinforced with a decorative brushed aluminum top inlay and a wide metal base skirt for a premium "retro" hardware look.

• Non-Slip Ribbed Texture: The black cylindrical body is precision-ribbed to provide excellent finger-tip traction for both rapid and fine-tuned adjustments.

• Universal Fit: Engineered to fit standard 6mm potentiometer shafts, making them an ideal replacement for most audio and electronic hardware.

Top 3 Customer Questions & Concerns ‍

 How do I align the "0" setting correctly? The knob should be pushed onto the potentiometer shaft while the pot is turned fully counter-clockwise. Align the "0" on the dial with your indicator mark on the equipment chassis before securing it.

Does the numbering wear off over time? No, the numbers on the EO-series knobs are printed using high-durability ink on the aluminum skirt, designed to resist fading and mechanical wear from frequent use.

Will these fit "D-shape" shafts? These knobs are typically designed for 6mm round or knurled (splined) shafts. For the best fit on D-shafts, check for an internal set-screw or ensure the internal diameter matches your specific component.