Graph Tech Ratio Electric Locking 6-In-Line Tuned Machine Heads

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Item # 2196-C
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Graph Tech Ratio Electric Locking 6-In-Line Tuned Machine Heads

About This Item

Faster and more accurate tuning
Optimized gear ratios for each string means tuning your guitar has never been easier.

Multi-geared tuning technology
The Graph Tech team tuned the gear ratios to each string position so that every string responds the same to any tuning adjustment. You get fine tuning on the thicker core strings and coarser tuning on the thinner core; anywhere from 12:1 to 39:1 gear ratio. With Ratio, one turn is about one tone change on all strings, making tuning, retuning and open tunings easier, quicker and more intuitive.

Predictable, precise tuning
Ratio tuning just feels right. You don't have to think about which string you are tuning because they all respond the same. No more overshooting the Low E or G. No more twisting away on the High E or D string. Open tunings have never been easier. String gauges such as light top, heavy bottom are no problem with Ratio; they still do the same precision tuning.

Don't sweat the small gears
Double-envelope gears made of hardened steel provide enhanced durability and ultra-smooth response for the high ratio gears.

Triple plated chrome finish with contemporary buttons.

  • Two pin mounting system, fits most headstocks
  • Includes InvisoMatch Standard Mounting Plates for easy installation, no drilling necessary in most cases
  • 13/32" (10mm) diameter pegholes required
  • Mounting screws and bushings included
  • Installation guide


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  • 3.00 average rating from 1 reviews

not convinced !


Verified Buyer

easy enough install...(i am a Luthier ) after using on my 59 strat..for 2 weeks playing out ...without using the strat vintage tremolo........i don't think they are any better than the old Klusons ! and they didnt have staggered posts the string come out of the nut pretty high to the tuners without any break over. for the price im disappointed... SB.

Response from StewMac

Hi Stephen,
Thank you for sharing your honest feedback with us. We're sorry to hear the Graph Tech Ratio Electric Locking 6-In-Line Tuned Machine Heads didn't meet your expectations. We stand behind our return policy -- if you are not satisfied you may return them anytime for a refund or exchange. Please call us at 1-800-848-2273. We look forward to helping you with this.

StewMac PDF Catalog, page 70 See Graph Tech Ratio Electric Locking 6-In-Line Tuned Machine Heads
on page 70 of our StewMac Digital Catalog