Scissor Jack

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Perform repairs where your arm can't reach. Our versatile Scissor Jack lets you perform tricky repairs inside an acoustic guitar with ease.

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Scissor Jack

Item # 0490
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$95.00

3 or more $84.55
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Video

Scissor Jack

Dan Erlewine demos the Scissor Jack, to simplify tricky repairs inside acoustic guitar bodies.


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Details

Perform repairs where your arm can't reach. Our versatile Scissor Jack lets you perform tricky repairs inside an acoustic guitar with ease.

Magnets make tricky interior alignment easy!
Many hours, a pile of prototypes, and inspiration from luthier Freddie Cisneros, went into the development of our Scissor Jack. There's no other tool to match its versatility and ease of use for interior acoustic guitar repair work:
• Holding braces, repair cleats and bridge plates for gluing
• Aligning the sides of a crack for gluing
• Supporting a fretboard over a guitar body for installing frets
• Simulating string tension on an unstrung guitar top, for accurate bridge saddle work and neck resetting

The Scissor Jack has smooth thumbscrew height adjustment. Best of all, it's easy to add the flexible extension cable supplied with the jack, so you can operate it deep inside the guitar where your arm can't reach!

One more cool feature: it comes with magnets. They help you position the jack and align exterior cauls in lots of versatile ways that make tricky clamping a LOT easier.

The Scissor Jack has sturdy machined aluminum, brass and steel parts for durability and long life in the busy repair shop. The glue-resistant polyethylene cauls are specially recessed for the supplied magnets (the jack can be used with or without the magnets).

Minimum height        2-1/4"        (57.15mm)
Maximum height 4-3/4" (120.65mm)
Caul diameter 1-3/4 (44.45mm)
Magnet diameter 1" (25.4mm)
Extension cable length        10-7/8"        (276.22mm)

Tips for using the Scissor Jack:



Use cauls to help spread the clamping pressure. Here the jack is applying pressure to a soundboard X-brace, while sitting on a caul that spans two back braces.



Here we're using exterior cauls on both sides of the guitar, to give the jack something to push against safely.


Magnets make caul alignment easy. A few examples:



With a steel washer (or magnet) outside the guitar, the jack hangs upside down, ready to hold a crack repair caul in place.



Notice the exterior cauls.



The gluing rig was easy to make; simply a 1/2" repair magnet screwed to a wooden dowel.



Here's a curved wooden caul that matches the curve of the guitar side. It has a magnet attached that holds the jack.


Warning: Seriously strong magnets!
The magnets supplied with our Scissor Jack are made of rare-earth neodymium boride. They can magnetize, degauss, or re-polarize any ferrous or magnetic material, including electric guitar pickups. Keep them away from magnetic storage media such as floppy discs, cassette and video tapes, as well as pacemakers, computers, CRTs, TVs and watches. Keep these magnets out of the reach of children! If more than one magnet is swallowed, they can attach to each other and cause intestinal perforation or blockage, which can be fatal.


Trade Secrets! Newsletter

Video: Gluing a Martin D-35 back brace

This issue of Trade Secrets is a video: Dan Erlewine glues a Martin back brace, using Scissor Jacks along with tools you can make in your own shop. After this video, we developed the Brace Gluing Wedge to simplify this job and reduce the number of tools needed.

Trade Secrets! Newsletter

Workin' in the soundhole with the scissor jack and a mirror

Dan Erlewine's got a repair that needs repairing again. Working inside the guitar body is too tight for comfort, but Dan shows some tools and tips that make it easier.

Ratings & Reviews

Scissor Jack

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  • Based on 10 Reviews
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Great Tool,

By Fsoheili from NYC
(Customer's Reviews) Wednesday, October 03, 2012


Scissor Jack saves a lot of time when working "blind" inside of a guitar, a great idea. A little over priced though.

Nicely made tool.

By Greg Robinson - Guitar & Amplifier from Melbourne, Australia
(Customer's Reviews) Tuesday, September 18, 2012


Doesn't get a whole lot of use in my shop, but I don't think there's anything I could use to replace it. Excellent design and execution.

Works well, but.....

By Bob Long from England
(Customer's Reviews) Sunday, May 27, 2012


Just used this for the first time in a position inside an archtop guitar at which the "remote control" extension cable was essential. It worked well but I found that with the "remote control" you can achieve very limited torque/pressure with the jack.

Very Handy to Have

By Middleton Guitars from Southern California
(Customer's Reviews) Wednesday, May 16, 2012


I've been trying to get by for years with those turnbuckle-style jacks, but I wanted better control.

This thing is great! I use this on my neck-jig and for proping up tops on acoustics with ease and precision! Wish I could afford a couple more of them.

Design gets 5, durability gets 1

By SF Guitarworks from San Francisco
(Customer's Reviews) Monday, March 19, 2012


We use this jack everyday to jack up the headstocks on our neck jig. It is a great design, but the pivot pins with the clips are weak. Drop it a few times and it falls apart. We changed all the pins out for machine screws with nuts and it stays nice and tight. I'm glad to have it, and if it came with screws and nuts it would be a solid 5 stars. Also, if you only use it lightly, you'll probably never have a problem.

Need one more

By Greg J. from Austin, TX
(Customer's Reviews) Friday, March 02, 2012


Flexible extension cable could be a few inches longer. Works very well. Will be getting another soon

A very useful and handy tool

By Mark A. Kane from Cary, NC
(Customer's Reviews) Sunday, October 02, 2011


I used it ten minutes after unpacking it! I needed to push out an endblock on a guitar that had been dropped, in order to align it with the top for gluing. I made up some spacers that bore against the neck block and the end block, cut such that the scissor jack was centered conveniently within the dimiensions of the soundhole. It worked with an easily adjusted precision. The reason I gave it 4 stars is that neither the knob nor extension stays put on the shaft. It needs a ball detent or other solution for this, though I suspect a ball detent would add considerably to the cost of an already moderately expensive tool.

Ergonomic

By Julyan Wallis, Guitar Doctor / J Gu from Cornwall, UK
(Customer's Reviews) Wednesday, May 04, 2011


Although the knob and cable do fall off easily, when you get used to it it's so clever. Pity it's so expensive, I want a couple more!!

Scissors Jack and Reinforcing Diamonds

By Jack J from Livermore, CA USA
(Customer's Reviews) Thursday, March 03, 2011


The Jack works well in positioning the reinforcing diamonds across a crack in the plate. Both the knob and the extension cable come off too easily. I suggest a spring ball detent to help hold them on.

One of my favorite inventions

By GuitarRepairShack from Calgary, Alberta
(Customer's Reviews) Sunday, November 07, 2010


After I got the hang of using it, I use it for 75% of my internal brace repairs. It works great at handling the bigger brace glue-ups that need good pressure.



Shown on page 22 of our latest catalog.