Upgrade your bass with CNC-machined tuning machines featuring wear-resistant PEEK gears. The Guyker BBA150SP is designed to help reduce long-term gear wear, maintain smoother tuning feel, and support more consistent tuning precision over time.

Key Features

• PEEK engineering polymer gears: Designed to reduce gear wear that can cause backlash, rough tuning feel, or reduced tuning precision after long-term use.
• CNC-machined aluminum construction: Made with aerospace aluminum alloy for a lightweight, precise, and durable tuner housing.
• 1:22 gear ratio: Provides smooth and controlled tuning adjustment for bass replacement and upgrade projects.
• Multiple layout options: Available in 4R, 4L, 2R+2L, 1R, and 1L layouts for different bass headstock configurations.
• Fitment reminder: Please confirm your bass peg hole diameter, post size, bushing type, and mounting screw position before ordering.

Technical Specifications

SKU / Model	BBA150SP
Product Type	Bass Tuning Machines
Suitable For	Bass guitar
Gear Ratio	1:22
Housing Material	Aerospace aluminum alloy
Gear Material	PEEK engineering polymer
Manufacturing Process	CNC machining
Color / Finish Options	Chrome, Black
Layout Options	4R, 4L, 2R+2L, 1R, 1L
Peg Hole Requirement	9.9 mm
String Post Diameter	6 mm
String Thru Hole Center Height	22.5 mm
Tuner Overall Length	42 mm
Housing Length	16 mm
Button Width	23.8 mm
Mounting Screw Hole Diameter	2.6 mm
Mounting Screw Hole Offset	10.5 mm
Bushing Type	Screw-in hex head
Button Style	Clover-style bass button
Package Includes	Varies by selected layout option

Compatibility Notes

Important: Please confirm your bass guitar’s peg hole diameter, post height, bushing type, and mounting screw position before installation. Bass models may vary by production year, factory, and region.

Package Includes

• Package quantity varies depending on the selected layout option.
• 4R option: 4 x right-side bass tuning machines with matching bushings and mounting screws
• 4L option: 4 x left-side bass tuning machines with matching bushings and mounting screws
• 2R+2L option: 2 x right-side bass tuning machines and 2 x left-side bass tuning machines with matching bushings and mounting screws
• 1R option: 1 x right-side bass tuning machine with matching bushing and mounting screws
• 1L option: 1 x left-side bass tuning machine with matching bushing and mounting screws

Installation Note

Before installation: Compare the product dimensions with your original tuning machines to confirm compatibility. Minor modification may be required depending on the bass model, production year, or existing hardware.

Size Reference

Important: Please keep the original size chart at the bottom of this product description. All listed dimensions must be checked against the original size chart before upload.

[Keep the original size chart / dimension image here]