

















Guyker GK-3639 Machine Head with 1:26 Ratio for Electric Guitar and Bass
SKU:GK-3639-black4L
PRODUCT DESCRIPTION
Fine-tune your electric guitar or bass with a high-ratio 1:26 tuning machine design. The Guyker GK-3639 offers multiple left/right configurations and three finish options for compatible replacement, repair, and custom instrument projects.
Key Features
- 1:26 gear ratio: Provides fine and controlled tuning adjustment for guitar and bass applications.
- Non-locking tuner design: Suitable for compatible replacement and upgrade projects where a traditional geared tuning machine is required.
- Multiple configurations: Available in 4L, 4R, 2R+2L, 1R, and 1L options for different headstock layouts and single-tuner replacement needs.
- Three finish options: Choose from Chrome, Black, or Gold to match your instrument hardware.
- Complete mounting hardware: Supplied with threaded bushings, mounting screws, and ferrules for installation.
- Fitment reminder: Please confirm your headstock hole size, mounting screw position, tuner orientation, and required layout before ordering.
Technical Specifications
| SKU / Model | GK-3639 |
| Product Type | Non-Locking Tuning Machine |
| Suitable For | Electric Guitar & Bass |
| Gear Ratio | 1:26 |
| Packaging Options | 4L / 4R / 2R+2L / 1R / 1L |
| Color / Finish Options | Chrome / Black / Gold |
| Weight | Approx. 129 g / piece |
| Bushing Type | Threaded Bushing |
| Included Hardware | Threaded Bushings / Mounting Screws / Ferrules |
Compatibility Notes
Important: Tuning-machine fitment can vary between guitar and bass models. Please verify your headstock hole size, mounting screw position, tuner orientation, and required 4L / 4R / 2R+2L / 1R / 1L configuration before ordering. For reverse headstocks, confirm the tuner side carefully before purchase.
Package Includes
- Package quantity varies depending on the selected configuration.
- 4L option: 4 x left-side tuning machines with matching threaded bushings, mounting screws, and ferrules
- 4R option: 4 x right-side tuning machines with matching threaded bushings, mounting screws, and ferrules
- 2R+2L option: 2 x right-side and 2 x left-side tuning machines with matching threaded bushings, mounting screws, and ferrules
- 1R option: 1 x right-side tuning machine with matching threaded bushing, mounting screw, and ferrule
- 1L option: 1 x left-side tuning machine with matching threaded bushing, mounting screw, and ferrule
Installation Note
Before installation: Compare the tuner dimensions, peg-hole requirement, mounting screw location, and orientation with your existing hardware. Minor modification may be required depending on the instrument model and headstock construction.
Size Reference
Important: Please keep the original product size chart at the bottom of this description and compare all installation dimensions with your existing tuning machines before ordering.
VIDEO SHOW
VIDEO
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 GK-3639 Machine Head with 1:26 Ratio for Electric Guitar and Bass
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
-
Shipping Information
Use this text to answer questions in as much detail as possible for your customers.
-
Customer Support
Use this text to answer questions in as much detail as possible for your customers.
-
FAQ’s
Use this text to answer questions in as much detail as possible for your customers.
-
Contact Us
Use this text to answer questions in as much detail as possible for your customers.

4 interest-free payments.