Detail 01
20:1 gear ratio
Provides a high-tolerance adjustment mechanism designed for accuracy and minimal slippage.
Product detailSKU #1500000413570
Leo Quan BadassTK-7815 SGT Sealed 4-in-Line Bass Tuning Machines Chrome
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Independent shopping perspective
The Korena take
Built for a 4-in-line bass headstock, the TK-7815 SGT set is intended as a direct replacement for Ibanez, Schecter, and other contemporary basses. Its 20:1 machined brass gearing is designed for accurate adjustment with minimal slippage, while the steel worm gear and sealed housing support long-term use. The zinc housing keeps the machine heads lightweight at the headstock.
Strong match
Who this is for
- Replacing 4-in-line tuners on an Ibanez, Schecter, or other contemporary bass designed for this replacement style.
Consider the trade-offs
When to look elsewhere
- Basses that do not use a 4-in-line tuner layout.
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
Sealed housing
Encloses the tuning mechanism as part of its durability-focused design.
Final check
Know before you order
- 01Confirm that your bass uses a 4-in-line tuner arrangement and is suited to this direct-replacement style.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01What tuner layout does the TK-7815 SGT use?
It uses a 4-in-line bass tuner layout.
02What is the gear ratio?
The machined brass gear has a 20:1 ratio.
