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SKU:BBA150SP-CR-4R
PRODUCT DESCRIPTION
Upgrade your bass with tuning machines designed for precise tuning control, smooth gear operation, and reliable performance in repair, replacement, and custom build projects. Made with an aerospace aluminum alloy housing and shaped through CNC machining, these tuners help reduce unnecessary headstock weight while maintaining dependable strength for daily use.
Key Features
- 1:22 gear ratio: Provides fine tuning adjustment for more accurate and controlled bass tuning.
- CNC-machined aerospace aluminum alloy housing: Made from lightweight aerospace aluminum alloy and processed with CNC machining for a clean fit and precise hardware finish.
- Brass gear mechanism: Built with brass gears for smooth turning feel and reliable wear resistance.
- Flexible bass layout options: Available in 4R, 4L, 2R+2L, 1R, and 1L configurations for full replacement sets or single tuner repair.
- Single-piece repair options: The 1R / 1L options are ideal when you only need to replace one damaged bass tuning machine.
- Clover-style bass tuner button: Offers a familiar grip and comfortable tuning feel for bass players.
- Finish options: Available in Chrome and Black to match different bass hardware styles.
Technical Specifications
| SKU / Model | BBA150SP |
| Product Type | Bass Tuning Machines |
| Suitable For | Bass Guitar |
| Layout Options | 4R / 4L / 2R+2L / 1R / 1L |
| Gear Ratio | 1:22 |
| Housing Material | Aerospace Aluminum Alloy |
| Gear Material | Brass |
| Manufacturing Process | CNC Machining |
| 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 |
| Finish Options | Chrome, Black |
Compatibility Notes
Please verify your bass headstock layout, tuner orientation, 9.9 mm peg hole requirement, 6 mm string post diameter, screw hole position, and original tuner dimensions before ordering. Choose the layout option that matches your bass headstock or the tuner side you need to replace.
Package Includes
The package includes the corresponding bass tuning machine(s), bushing(s), and mounting screws according to the selected option.
Installation Note
Please check the measurements of your existing hardware before installation. Bass models may vary by production year, factory, and region, and minor modification may be required depending on the instrument.

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FAQS
Do you class a reverse headstock guitar as a left hand guitar?
How do I determine the right size/fit for a specific accessory?
Can you provide more details about the materials used in your products?
At Guyker, we prioritize the use of high-quality materials to ensure the durability and performance of our products. While the specific materials used may vary depending on the accessory, we commonly utilize materials such as:
■ Metals: We often use materials like stainless steel, aluminum, and brass for hardware, bridges, and other metal components.
■ Plastics: Certain accessories may incorporate durable and impact-resistant plastics such as ABS or polycarbonate for knobs, pickguards, and other components.
■ Woods: Some accessories, like guitar knobs or picks, may be made from various types of wood, including rosewood, ebony, or maple.
For more detailed information about the materials used in a specific product, we recommend reviewing the product descriptions or reaching out to our customer support team at [support@guyker.com] for further clarification.
Do you offer international shipping?
Yes, we offer international shipping to customers worldwide. When placing your order, please ensure that you provide accurate international shipping information, including your complete address and contact details.
Please note that international shipping may be subject to customs duties, taxes, and additional fees imposed by the destination country. These charges are the responsibility of the recipient and may vary depending on the country's customs policies.
What is your process for returning or exchanging a product?
To initiate a return or exchange, please follow these steps:
■ Contact our customer support team at [support@guyker.com] or visit our website's Returns/Exchanges page.
■ Provide your order details and the reason for the return or exchange.
■ Our customer support team will guide you through the process and provide you with a return/exchange authorization if applicable.
■ Follow the instructions provided, including packaging the product securely and attaching the necessary labels or documentation.
■ Ship the product back to us using a traceable and insured shipping method.
■ Once we receive the returned product and verify its condition, we will process the return or exchange accordingly.
Can I return or exchange a product if it's been used?
In most cases, products that have been used or show signs of wear may not be eligible for return or exchange unless there is a defect or error on our part. We recommend reviewing our specific return/exchange policy or contacting our customer support team at [support@guyker.com] to determine the eligibility of your particular product.
Do I need to cover the return shipping costs?
The responsibility for return shipping costs may vary depending on the reason for the return or exchange. In some cases, such as if the product is defective or if we made an error, we will provide a prepaid shipping label or reimburse your return shipping costs. However, if the return or exchange is due to a change of mind or a non-defective product, you may be responsible for the return shipping costs. We recommend reviewing our return/exchange policy or contacting our customer support team at [support@guyker.com] for specific details regarding return shipping costs.

Guyker BBA150SP Bass Tuning Machines - CNC-Machined Aerospace Aluminum Alloy
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