
Price updated 27 Apr 2026, 16:00
Graph Tech·Guitars and Basses›Guitar & Bass Spare Parts›Guitar/Bass Machine Heads›3L/3R Tuning Machines for Guitar
Graph Tech PRL-8351-BO Machine Heads
Fair Price· Near 90-day average
90d Low
£148.90
Best seen
90d High
£148.90
Worst seen
90d Average
£148.90
Baseline
30d Forecast
—
→ Stable
Price History
Avg priceMin–Max band
Fair Price· Near 90-day average
Stores:
Deep Intelligence Analysis
RSI · Bollinger Bands · Buy/Sell Signal · News
Compare offers
| Store | Price + Ship | Condition | Rating | |
|---|---|---|---|---|
Best£148.90 + £8.90 ship | new | — |
Product Description
- Graph Tech PRL-8351-BO Machine Heads
- Set of Locking Machine Heads for Electric Guitar
- Configuration: 3 left / 3 right
- Right-handed set
- Sealed design
- Each tuner has its own gear ratio calibrated for the respective string
- Half a turn of any tuner changes the tuning of the respective string by a semitone
- Faster, more accurate tuning of each string
- Locking screw on the back for locking the string
- Gear ratio: E - 12:1
- B - 20:1
- G - 35:1
- D - 20:1
- A - 24:1
- E - 39:1
- 2-pin mounting
- Shaft diameter without mounting bushing: 6 mm
- Installation diameter with mounting bushing: 9.8 mm
- Weight per machine head: Approx. 38 g
- Vintage Keystone buttons
- Colour: Black
- Includes four sets of InvisoMatch standard mounting plates to utilise existing screw holes























