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SKU:Guitar Tuners-GK-136CSP
PRODUCT DESCRIPTION
Upgrade your ST or TL-style guitar with Guyker GK-136SP locking tuners designed for smooth 1:15 tuning control, faster string changes, and stable string handling. This 6R tuning machine set is made for right-hand guitar headstocks and replacement projects where the tuner layout, 10 mm peg hole requirement, and mounting footprint match the size chart.
Key Features
- Locking tuner design: Helps make string changes faster and can reduce string slippage during regular playing.
- 1:15 gear ratio: Provides practical tuning control for everyday playing, repair, and setup work.
- 6R layout for right-hand guitars: Designed for headstocks using six right-side tuning machines.
- Screw-in hex head bushing: Built for secure installation on compatible headstocks.
- Multiple finish options: Available in Chrome, Nickel, Rainbow, Gold, Old Rust, and Bronze depending on the selected variant.
- Fitment reminder: Please compare the size chart with your original tuners before ordering, especially the peg hole size, post diameter, bushing dimensions, and screw position.
Technical Specifications
| SKU / Model | GK-136SP |
| Product Type | Locking Tuning Machines / Guitar Machine Heads |
| Suitable For | ST/TL-style guitars and other compatible 6R right-hand guitar replacement projects |
| Layout | 6R for right-hand guitar |
| Gear Ratio | 1:15 |
| Peg Hole Requirement | 10 mm |
| Weight per pc / per set | 35.5 g / 213 g |
| String Post Overall Height | 21.5 mm |
| String Post Diameter | 6 mm; size chart shows Ø5.9 mm reference |
| Max. String Gauge | 1.8 mm |
| String Thru Hole Center Height | 27 mm |
| Bushing Type | Screw-in hex head |
| Bushing Reference | Ø15 mm outer reference, Ø8.2 mm inner reference, Ø6.2 mm section, 14.5 mm height shown in size chart |
| Housing Reference | 23.8 mm height and 17.5 mm width shown in size chart |
| Button Reference | 17.3 mm width and 13.3 mm height shown in size chart |
| Finish Options | Chrome, Nickel, Rainbow, Gold, Old Rust, Bronze |
| Package Includes | 6 x guitar machine heads, 6 x threaded bushings, 6 x mounting screws, 6 x ferrules |
Compatibility Notes
Important: The original product page describes these tuning key pegs as designed for modern 10 mm headstock holes and compatible with a wide range of Gibson Les Paul, Fender Strat, SG, LP, EPI, Telecaster-style electric or acoustic guitars. Because this set uses a 6R right-hand guitar layout, please confirm your headstock layout before ordering. Compare the size chart with your original tuners and check the 10 mm peg hole requirement, post diameter, bushing dimensions, string thru hole height, and mounting screw position. Minor modification may be required depending on the guitar model, production year, or existing hardware.
Package Includes
- 6 x guitar machine heads
- 6 x threaded bushings
- 6 x mounting screws
- 6 x ferrules
Installation Note
Before installation: Do not force the tuner posts or bushings into incompatible headstock holes. Align the tuner body and screw holes carefully before tightening the mounting screws.
Video Show
Size Reference
Important: Please refer to the size chart below and compare all dimensions with your original part before ordering.

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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.

GK-136SP 6R Lock String Tuners For ST/TL Guitar Gear ratio 1:15
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