Sperzel Trim-Lok 3+3 Guitar Machines

  • 16 Reviews
  • Write a review

Sperzel's rear thumbscrew locks the string, making these machines ideal for tremolo guitars. For 3-left/3-right pegheads.

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Sperzel Trim-Lok 3+3 Guitar Machines Satin chrome

Satin chrome

Item # 3421
In stock, ready to ship!


3 or more $55.81
Sperzel Trim-Lok 3+3 Guitar Machines Satin black

Satin black

Item # 3421-B
In stock, ready to ship!


3 or more $59.24
Sperzel Trim-Lok 3+3 Guitar Machines Satin gold

Satin gold

Item # 3421-G
In stock, ready to ship!


3 or more $68.65
Quantity Discount Prices apply when you buy multiples of the same item number.
Total: $0.00
Quantity: 20


Sperzel's rear thumbscrew locks the string, making these machines ideal for tremolo guitars. For 3-left/3-right pegheads.

Cast gear housings with sealed lubrication. Single pin mount keeps tuner from rotating, no mounting screws needed. Recommended for 9/16" - 11/16" thick pegheads.

• 12:1 ratio
• 10mm (13/32") diameter pegholes required
• Removable metal knobs
• Threaded peghead bushings included
• Sets of 6

    • Item #
    • Weight
    • 3421
    • 0.556 lbs. (0.25 kg)
    • 3421-B
    • 0.485 lbs. (0.22 kg)
    • 3421-G
    • 0.484 lbs. (0.22 kg)

Ratings & Reviews

Sperzel Trim-Lok 3+3 Guitar Machines

  • Based on 16 Reviews
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By oldvalue from Athens GR
(Customer's Reviews) Wednesday, March 20, 2013

Very good quality, nice looking, great job, easy to fix it (not only for Gibson LP). I should prefer a better ratio (at least 16:1) but i thing this is a minor issue. Hope it stays in tune for years (I'll wait some years to give the fifth star:-)) . Stewmac is very reliable and professional in shipping all over the world. Nice job guys!

Almost great, but...

By Ned Milburn - HandCraftedGuitars.ca from Dartmouth, NS
(Customer's Reviews) Wednesday, July 25, 2012

I love these tuners with 2 small exceptions:

1) Sometimes large string gauges are hard to get through the hole.
2) This is more important. There is a little bit of play in the worm gear mechanism. The quality is exceptionally good except for this worm gear play. With strings to tension, this is not very noticable, but it doesn't change the fact that it exists.

Love my Sperzels

By Chuck Hundley from Highland, Ca.
(Customer's Reviews) Saturday, July 21, 2012

I have Sperzels on all of my guitars. They are the best replacements for tuners on guitars you have trouble getting to stay in tune due to various issues. I've been putting them on all my guitars for almost 20 years, the most recent was my new Gibson SG. I would suggest also purchasing the jig they sell to drill the hole for installing them. It makes installing the Sperzel heads fast and perfect every time. I also like the idea of the alignment pin instead of screws so your not making multiple holes in your head stock and if you decide to put the original tuners back on your guitar there are no visible marks left!

Fantastic, solid, high quality.

By Guitar nut from NM USA
(Customer's Reviews) Thursday, June 28, 2012

Better than I imagined, worth it 100%. Compared to my last tuners, these tuners are the best. They look good also. Do not hesitate on getting these.

Simply the Best

By Nick.H from Sydney
(Customer's Reviews) Wednesday, January 11, 2012

They do everything they claim, and they do it well. I was very impressed with the performance and how well made my set was =]

Superb tone - Killer looks

By Acid from Buenos Aires
(Customer's Reviews) Saturday, January 07, 2012

I have two sets of these. They are a kinda heavy, but make your life really easy when tuning and replacing strings. Really, I would not change them for any reason.

Great tuners

By Martinez Violworks from Lawrence, MA USA
(Customer's Reviews) Friday, December 30, 2011

These are awesome tuners. I have them in my electrics as well as my acoustics. Installing them is somewhat tricky, and they may come out crooked even if you use the included cardboard template. StewMac sell a nice little jig to solve that issue. I always hear people complain about the ratio, as these are 12:1 and there are some tuners out there that have an 18:1 ratio. In all my 30 years as a guitarist I have never encountered a player that could not reasonably tune a guitar because of a 12:1 ratio. You can blame that on deafness, but not on the ratio. The tuning stability and ease of string changing is worth every penny you pay for these tuners. Get them.

Great tuners

By Natalya Lepskaya from Russia
(Customer's Reviews) Sunday, September 25, 2011

Great tuners, easy to install strings, gently work, light weight.
Good price!

Lock, Lock, It's There

By Porterhouse Pat from Charleston, IL
(Customer's Reviews) Saturday, June 04, 2011

This is my second set of these tuners and I can't say enough about them. I put them on my first project guitar ten years ago and they're still working great. I love that you can just stick the string in, lock it down and tune up. I can leave my other guitar in its case for a month, come back to it and it's still in tune. Great tuners!

Installation is easy, but not obvious

By Mario from NY
(Customer's Reviews) Friday, April 22, 2011

I just want to chime in here to hopefully save somebody the trouble I ran into. I bought the 6 in-line set. The tuning gears ship with a template that you use to install them correctly. However, the word "template" appears nowhere, and to me, at least, it wasn't obvious.

The part of the box where the instructions are IS the template! You cut along the dotted line, punch out the small hole, and then use the flat edge (opposite where you cut) to line up against the edge of your neck's head.

Once I realized that, after searching the Web, it was easy.

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