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8" Radius Blocks

5.0
  • 169 Reviews
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7-1/4" radius

Item # 0415
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9-1/2" radius

Item # 0405
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10" radius

Item # 0416
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11" radius

Item # 0406
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12" radius

Item # 0417
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13" radius

Item # 0437
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14" radius

Item # 0419
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15" radius

Item # 0420
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16" radius

Item # 0418
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17" radius

Item # 0421
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18" radius

Item # 0438
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19" radius

Item # 0439
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20" radius

Item # 0403
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Flat

Item # 0440
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8" Radius Blocks

About This Item

Accurately true or change a fingerboard's radius and level frets.
We make these hardwood blocks for use with Stikit Abrasives, to radius a fretboard quickly, accurately and without guesswork.

Shaping fingerboards: use 80 through 220-grit
Leveling frets: use 220 through 400-grit

When working on compound radius fretboards, simply change blocks as you progress along the neck.

Dimensions: 8" (203.20mm) long x 2-3/4" (69.85mm) wide

See our shorter blocks for spot leveling, and for use as clamping cauls when gluing frets.

What's your radius?
Quickly find the curvature of a fingerboard or bridge with a set of radius gauges. Use them frequently to check your work as you smooth or shape a fingerboard or frets: a quick visual check keeps you from accidentally altering the shape—a mistake that's easy to make and hard to fix.

Radius Gauges


Instructions

Product Instructions

Radius Block Basics

An explanation of the different uses of a radiused sanding block.

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5.0
  • 4.78 average rating from 169 reviews
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5.0

Made my guitar(s) play great!

By

Verified Buyer


I am very happy with the results after using this tool. I am not an expert, or even a good amateur, but I do like getting stuff working well, and this REALLY did that for the guitars I have flattened so far. I just wanted to let others know what I found out before they start down the same path.
- YouTube is your best friend here...
- Along with this block (check for the correct radius), sticky sandpaper, and a truss wrench/key, you will NEED a slotted straightedge for the guitar's correct scale length. You need to pull the strings off (I just pulled the pins and used a twist tie to coil the strings at the headstock), and then use the truss rod adjustment to get the fretboard wood as straight as you can BEFORE you start fret leveling. I don't think that the board straightening step is optional, and (as far as I can tell) you need to use the slotted straightedge tool to do it right (and also to set your relief after you are done).
- I bought the #320 sticky sandpaper roll. Worked like a champ, but if I did it over, I would probably buy closer to #400 grit (or maybe even finer?) to better balance final smoothness with speed of cutting.
- It doesn't take much sanding on your frets with this block to get a shiny strip across the entire top of each fret. Stop quickly once you see all of the fret tops are fully polished. No need to waste any extra fret depth, and if it didn't quite do the job, it only takes another 30 minutes total work time to touch up. I left some tiny dents where the high E string had worn a groove. Light reflected off the tops of the frets worked great to verify progress.
- I was super careful to keep the block centered and square, and sand lightly and evenly along the entire fretboard. The first 30 seconds to a minute (very light pressure), I could feel slight bumps as the individual frets passed under the block. It soon went to a smoother glide for the last minute or so till all of the fret tops were even.
- If you take it easy on your frets, you probably don't need a fret dressing file or polishing tools right away, though the fret dress and polish looks like it will add a new dimension to the look and feel of the guitars. Just not quite in the same league of upgrade as making the frets buzz free.
- Good Luck

5.0

A great radius block

By

Verified Buyer


I needed a radius block to level the fingerboard on my fretless and this was just what I needed! I went with the 8'' so that I could cover more area since I was doing the entire fingerboard. Paired the block with the adhesive sand paper and my job was done quickly, and the results were super!!
Thanks StewMac!!

5.0

Great for the Price.

By

Verified Buyer


I have a set of these now and for the price you can't beat them!

5.0

The right tool

By

Verified Buyer


A great job is done with the help of the right tool. This one fits the bill for a number of applications related to a 12” fingerboard.

4.0

Works well for what I wanted it for

By

Verified Buyer


I bought the less expensive wooden block instead of the high $ aluminum blocks because I have a few cheaper acoustic guitars that I wanted to level and I wasn't disappointed. I didn't get the stick on paper, I just wrapped a full sheet around the block and it did the job. In the future, I will probably get the sticky paper but it isn't a must to do the job. I'm not sure if I'd use it on my more expensive guitars but fortunately, they aren't in need of any fret work anyway. If wrapping the paper around the block as I did, you can trim the length of the sheet to fit the length plus, I was able to hold the paper tighter than in the photos. They are for representation of how I did it anyway. Four stars only because the end edges are able to get dinged on a fret if you're not careful. But otherwise, I think it's a great tool and would recommend it.

4.0

radius block

By

Verified Buyer


Overall good, but mine has a knot hole in the wood on the radius side. I wasn't happy about that but will deal with it. I have nearly everyone of the short ones, the longer ones are better.

Response from StewMac


We're sorry to hear that you received an 8" Radius Block with a knot hole. If you would like to speak with our Customer Support Team about a replacement or a refund for this product, feel free to give us a call at 1-800-848-2273. We look forward to helping you with this.

Response from StewMac


We're sorry to hear that you received an 8" Radius Block with a knot on the backside. If you would like to speak with our Customer Support Team about a replacement or a refund for this product, feel free to give us a call at 1-800-848-2273. We look forward to helping you with this.

Response from StewMac


We're sorry to hear that the 8" Radius Block you received has a knot on the backside. If you would like to speak with our Customer Support Team about a replacement or a refund for this product, feel free to give us a call at 1-800-848-2273. We look forward to helping you with this.

5.0

Setup new guitar.for kids

By

Verified Buyer


Music teacher buys 6 cheap elec. guitars at a time for his class and brings them to me for setup. Block makes it quick and easy. First get the neck flat. Mark each fret. Lightly sand with block that matches neck . Chuck marks for high frets.level, crown, string to pitch , set relief at .010.set strings 2/32 at the 12th and let the kids 8 to 12 have fun .

5.0

Fret buzz on some high frets; 8" radius block helped.

By

Verified Buyer


I had fret buzz from some high frets. The 8" radius block helped some to reduce the buzz, but I need to use heavier sand paper to finish the job.

5.0

Great

By

Verified Buyer


Thx =)

5.0

8" Radius Blocks

By

Verified Buyer


Besides leveling frets and fretboards, I use these to radius the top of my string nuts I install. It does a more uniform job than I could ever do with a shaping file.

Showing 10 of 169 Read more reviews >>


StewMac PDF Catalog, page 10 See 8" Radius Blocks
on page 10 of our StewMac Digital Catalog