11 best radius gauges

Radius gauges are precision measurement tools used in various industrial and scientific applications for determining and inspecting the radii or curvatures of objects, particularly in manufacturing and engineering. Here are some key points about radius gauges:

  1. Purpose: The primary purpose of a radius gauge is to measure and verify the radius of a curved or rounded surface. It ensures that a component meets the required specifications and tolerances.

  2. Design: Radius gauges typically consist of a set of thin, curved leaves or blades, each with a specific radius. These leaves are usually made of stainless steel or other durable materials. They are attached at one end to a common base or holder.

  3. Variety of Radii: Radius gauges come in sets, with each gauge leaf featuring a different predefined radius. This variety allows them to measure a wide range of radii, from small curves to larger arcs.

  4. Use Cases: Radius gauges are used in various industries, including metalworking, woodworking, automotive, aerospace, and more. They are essential for quality control, ensuring that components meet design specifications.

  5. Measurement Process: To use a radius gauge, an inspector or technician selects the appropriate leaf that matches the curvature they want to measure. They then place the leaf against the curved surface and check for a perfect fit. The leaf should snugly match the curvature without any gaps.

  6. Accuracy: Radius gauges are known for their high accuracy and precision.They provide a quick and reliable way to verify the radius of a curve, often with tolerances in micrometers (μm) or thousandths of an inch.

  7. Common Types: There are different types of radius gauges, including concave radius gauges for measuring inside curves and convex radius gauges for measuring outside curves.

  8. Radius Fillets: In manufacturing, radius gauges are commonly used to inspect fillets, which are the rounded transitions between two surfaces. Accurate fillet measurements are critical in ensuring the structural integrity of components.

  9. Maintenance: Proper care and maintenance of radius gauges are essential to maintain their accuracy. They should be stored in protective cases or holders to prevent damage to the delicate leaves.

  10. Cost and Availability: Radius gauges are available from various manufacturers and suppliers, and their cost can vary depending on the material, precision, and the number of leaves in the set.

  11. Alternative Tools: While radius gauges are highly specialized tools for measuring curves, other measurement tools like calipers and micrometers can provide radius measurements for less complex curves.

In summary, radius gauges are precision instruments used to measure and inspect the radii or curvatures of objects in industrial and scientific settings. They are valuable tools for quality control, ensuring that manufactured components meet design specifications and tolerances.

Below you can find our editor's choice of the best radius gauges on the market
  

Accusize Industrial Tools 25 Pc Radius Gage Set Fractional 1/64-1/2'' Gages with Holder, Eg02-5021

Accusize Co., Ltd.

Based on 219 reviews Check latest price
  • Satin chrome finish
  • Individually marked
  • Rust proof steel
  • Supplied in plastic fitted case
  • 25 PCS set :1/64 - 17/64'' by 64th and 9/32 - 1/2 by 32nds with holder

User questions & answers

Question: Are the gauges certified
Answer: They all come in their own packaging inside a bag for all of them

Product features

Accusize Industrial Tools

Features:

  • Satin chrome finish
  • Individually marked
  • Rust proof steel
  • Supplied in plastic fitted case
  • 25 PCS set :1/64 - 17/64'' by 64th and 9/32 - 1/2 by 32nds with holder

Accusize Industrial Tools 26 Pc Radius Gauge Set 0.010'' to 0.500'' Gauges with Holder, Eg02-5025

Accusize Co., Ltd.

Based on 92 reviews Check latest price
  • Range: 0.010" - 0.500" with holder
  • Satin chrome finish
  • Individually marked
  • Rust proof steel; Supplied in plastic fitted case.
  • includes sizes: 0.010" to 0.025" by 0.005" ; 0.030" to 0.100" by 0.010"; 0.120" to 0.300" by 0.020" ; 0.350" to 0.500" by 0.050" .

User questions & answers

Question: Are these hardened
Answer: It's real aluminum but cheaply made. Neither kazoo worked very well. Head to ebay and buy one from the 60's. No comparison. Even the wooden one kind of sucks.
Question: Are these marked as decimal rather than fraction
Answer: Hi friend,we didn't received your emails,and did you received the kazoo?You also can contact the amazon service team and ask them about the specific situation of the item, because our goods are fulfilled by Amazon.
Question: what are the sizes of each gage
Answer: It's make in China.

Dreamtop Set of 9 Guitar Radius Gauge Understring Radius Gauge String Gauges Luthier Tools for Guitar and Bass Setup

Based on 757 reviews Check latest price

Product description

Fast, accurate bridge saddle adjustment

- Each gauges has an ccurately radiused arc on both the top and bottom surfaces, and is shaped to fit easily under the strings.

- Use the bottom curvature to determine your fretboard radius, and the matching top curvature becomes a reference for setting string saddle heights for best playability.

- They're handy for matching pickup polepiece heights to the arc of the strings, too.

- Precision laser-cut from .050" stainless steel, the set of nine gauges includes 7.25", 9.5", 10", 12", 14", 15", 16", 17" and 20" radius.

Laser cut from stainless steel

- Top edges: used to determine the proper height adjustment for the bridge saddles

- Bottom edges used to check radius of nut, fingerboard and saddle

Specification:

Color: silver

Material: Stainless steel

Package Included:

Set of 9 understring radius gauges (7.25", 9.5", 10", 12", 14", 15", 16", 17" and 20")

  • 【Usage Range】All kinds of electric guitar, electric bass, acoustic guitar, acoustic guitar, electric box guitar fretboard measured in radians, and radians to adjust the strings piano code
  • 【Accurate Measurement】Fast, accurate bridge saddle adjustment,obtain accurate measurements of your instrument's fretboard radius,saddle radius nut radius from either the top or the bottom radius surface
  • 【Easy to Use】Fast, accurate bridge saddle adjustment. These come in the most popular fingerboard radius and make it easy to measure the radius from either above or below the strings
  • 【Understring Radius Guages】Stainless steel material,set of 9 including: 7.25", 9.5", 10", 12", 14", 15", 16", 17" and 20" radius,A must have for bass guitar maintain and adjustment
  • 【100% Satisfactory After-Sales Service】- If you have any problems while receiving our product or after that, please contact us through emails at any time. We will offer you a quick response within 24 hours and give you the most satisfied solution.

User questions & answers

Question: what are the accuracy tolerances
Answer: hey! so you don’t just blow air randomly in it, it’s almost like you have to talk and hum inside of it! i thought mine was broken!
Question: How do you know which one to use
Answer: I think so it seems thick enough for a light engraving
Question: Where are they made
Answer: It reads "Made in China" on the tube carton that it comes in.
Question: are the nubers stamped
Answer: I would imagine you could if you remove the clear paper from the bowl.

OBPFY Stainless Steel Radius Gauge Set, 6Pcs Portable Concave Convex External Internal Arc Measuring Tool for Tool and Die Makers Check (R0.3-1.5/ R1-6.5/ R7-14.5/ R15-25/ R25-50/R26-80)

OBPFY

Based on 10 reviews Check latest price

Product description

Our Radius Fillet Gauges Set Contains 6 Different Shapes and Measuring Range,to Meet You Various Need.



Measurement System: Metric

Measuring Range: R0.3-1.5mm, R1-6.5mm, R7-14.5mm, R15-25mm,R25-50mm, R26-80mm



Measuring Range Detail:

R0.3-1.5mm: 0.3/0.4/0.5/0.6/0.7/0.8/0.9 1.0/1.1/1.2/1.3/1.4/1.5;

R1-6.5mm: 1/1.25/1.5/1.75/2/2.25/2.5/2.75/3/3.5/4/4.5/5/5.5/6/6.5;

R7-14.5mm: 7/7.5/8/8.5/9/9.5/10/10.5/11/11.5/12/12.5/13/13.5/14/14.5;

R15-25mm: 15/15.5/16/16.5/17/17.5/18/18.5/19/19.5/20/21/22/23/24/25.

R25-50mm:25/26/27/28/29/30/32/34/35/36/38/40/42/45/48/50

R26-80mm:26/27/28/29/ 30/ 32/ 35/40/45/50/ 55/ 60/65/70/75/80.



Specifications:

Product Type: Radius gauge

Material: Stainless steel



Package Included

R0.3-1.5mm x 1

R1-6.5mm x 1

R7-14.5mm x 1

R15-25mm x 1

R25-50mm x 1

R26-80mm x 1

Total: 6Pack



Tip:Due to the different reasons of computer monitors, the pictures and the actual objects may be slightly different in color.

  • 【Feature】-- The radius measuring instrument has two types of leaves so it can check both convex and concave surfaces. Each leaf is clearly marked, Convenient to identify which leaf you need.
  • 【Scope Application】-- This radius gauge is widely used in home improvement, machine installation, Electric equipment, Suitable for tool and mold manufacturers, Mechanics and many other workers to check the tool radius of the meter, Measure the thickness or width of screw, Valve, Bearing ect.
  • 【Material】-- High quality stainless steel material made, Anti-rust and corrosion resistant, Durable and not easy to deform.
  • 【Size】-- R0.3-1.5mm/R1-6.5mm /R7-14.5mm/R15-25mm/R25-50mm /R26-80mm
  • 【Package】--6 Pcs Radius Gauge Set

Mitutoyo 186-101, Radius Gage Set, 15 Pairs of Leaves, 1/32 to 1/4 by 64ths

Mitutoyo

Based on 10 reviews Check latest price

Product description

Mitutoyo Radius Gage Set, Range: 1/32" to 1/4" by 64ths, Number of leaves: 15 Pairs of Leaves

  • Radius size is stamped on each gage
  • Both concave and convex radius gages
  • With a locking clamp.
  • Measurement Graduations: 1/64 inches

Accusize Industrial Tools 26 Pc Radius Gauge Set Metric 0.5 mm -13.0 mm Gauges with Holder, Eg02-5026

Accusize Co., Ltd.

Based on 29 reviews Check latest price
  • Range: 26 pcs set 0.5 mm - 13 mm by 0.5 mm without holder
  • Satin chrome finish
  • Individually marked
  • Rustproof steel
  • Supplied in plastic fitted case

User questions & answers

Question: How thick are each gauge
Answer: There is nothing on or in the box that indicates where the product was made.

Baileigh IRG-3600 Inside Radius Gauge

Baileigh

Based on 4 reviews Check latest price

Product description

With the Baileigh IRG-3600 inside radius gauge, it is possible to measure the curvature of an arc quickly, easily, and accurately. Instantly measure anything from hand-railing to doorway arches, or anything that is curved. It is easy to replicate curves made on machines such as ring rollers and plate rolls.



Included with each radius gauge that Baileigh Industrial sells is the variable arc attachment. Used together with either the inside radius gauge or the outside radius gauge, the variable arc will allow the user to transfer any arc to another medium easily by tracing along the variable-arc.

  • REPLICATE MACHINE-MADE CURVES: Such as ring rollers and plate rolls.
  • RANGE: 7 to 144 inch radii
  • CONSTRUCTION: Aluminum
  • ACCURATELY MEASURE THE CURVATURE OF AN ARC: +/- .5%
  • INCLUDES VARIABLE ARC ATTACHMENT: Transfer any arc to another medium easily by tracing along the variable arc.

User questions & answers

Question: Can i measure a wheel loader bucket radius with this
Answer: No paint - it is anodized aluminum.

Activists 15 Pieces Guitar Luthier Tools Including Guitar Radius Gauge, String Action Ruler, 32 Blades Feeler Gauge, Fingerboard Fret Protector Guards and Grinding Stone for Guitar and Bass Setup

Based on 387 reviews Check latest price

Product description

Believe us! It is an indispensable tool both for guitar technicians and guitar players! This luthier tool set is designed to help with the common repairs and adjustments of guitar fret



Stainless Steel Feeler Gauge

Instructions:

1. Ensure that the feeler is clean

2. Insert the feeler gauge into the gap to be measured, adjust it, and tighten the screw when you feel a little resistance. At this time, it is the measured data.

Material: 65 manganese steel with a lube oil coating to prevent pitting and corrosion.

Blades: 32 pieces

Measurement: from 0.0015 inch (0.038 mm) to 0.035 inch (0.889 mm)



Radius Gauge

Radius Gauge come in the most popular fingerboard radius and make it easy to measure the radius from either above or below the strings

Material: Stainless steel

Radian Measurement: 7.25", 9.5", 10", 12", 14", 15", 16", 17" and 20" radius



String Action Ruler

Material: stainless steel

Size: 55mm×90mm×1mm

Graduations displayed: mm and inches



Fingerboard Guards:

Material: stainless steel

Size: 3 x 0.8 inch and 3 x 0.5 inch

Designed to protect the fingerboard when doing work on your fret. Prevents scratching or damaging to guitar or bass fretboard when filing and polishing frets.



Grinding Stone:

Size: 3.9 x 0.4 inch/ 10 x 1.1 cm

Professional tool for polishing saddle, nut and frets



All accessories are placed in a bundle pocket, easy to store and carry



Package Including

1 Set of 32 blades feeler gauge

1 Set of 9 understring radius gauge

1 Set of string action ruler

2 x Fingerboard guards

1 x Grinding stone

  • [Quality Material Luthier Tools] Stainless steel guitar gauge sets with rounded off edge, heavy duty material, rustproof and corrosion-resistant, won't scratch or hurt your hands or the fingerboard and frets
  • [Guitar Radius Gauge] comes in 9 sizes: 7.25 inch, 9.5 inch, 10 inch, 12 inch, 14 inch, 15 inch, 16 inch, 17 inch, 20 inch, luthier tools for Guitar and Bass Setup
  • [32 Blades Feeler Gauge] Steel Feeler Gauge measuring range: 0.0015 inch/ 0.04 mm to 0.035 inch/ 0.88 mm, light oil covered to prevent rust and stick, thumb screw is easy to use for blade removal and protection
  • [String Action Ruler] Size 8.9*5.1cm, metric & imperial, etch printing on double sides, will not fade, accurate and clear to measure string height, bridge height, nut slot depth, bridge slot depth and pickup height
  • [Fingerboard Guard with Grinding Stone] Prevents scratching or damaging to guitar or bass fretboard when filing and polishing frets, 10cm x 1.1cm Grinding stone for polishing saddle, nut and frets

User questions & answers

Question: Are these tools ok for 7 string guitars
Answer: I cannot taste the metal. Nice quality and sounded good.
Question: Is this set works for Classical Guitar
Answer: It is not, try humming if you are not already.
Question: How accurate are the tools? I've bought many 3 parties tools and they are not very accurate. Thanks in advance
Answer: Are you humming vs. blowing?
Question: What grit is the grinding stone
Answer: I answered that previously, and they are called membranes also.

MusicNomad Precision Fretboard and String Radius Gauge Tool-2 pc. Set (MN603)

Based on 17 reviews Check latest price

Product description

Being able to measure your fretboard & string radius is a critical step in the setup process. MusicNomad’s precision Radius Gauge is packed with features & benefits. The accurate measurements (7.25”, 9.5”, 10”, 12”, 14”, 15”, 16”, 20”) & easy to follow instructions on the gauge give you the confidence to get the job done right. The premium stainless steel with polished smooth edges combined with laser etched numbers and text ensures years of use. That’s MusicNomad quality – raising the bar in equipment care.

  • Precision Radius Gauge Set with 7.25”, 9.5”, 10”, 12”, 14”, 15”, 16”, 20” Accurate Measurements
  • Measures Your Fretboard Radius & String Radius on Electric, Acoustic & Bass Guitars
  • Innovative Black Finish Makes It Easier to See if Strings are Touching, Plus Instructions Etched in the Gauge Takes out the Guesswork
  • The Premium Stainless Steel with Polished Smooth Edges Combined with Laser Etched Numbers and Text Ensures Years of Use
  • This Gauge is Part of our KEEP IT SIMPLE, SETUP (KISS) Method using our Precision Gauges & Tool Sets

Product features

Measuring your String Radius has Never Been Easier

Being able to measure your fretboard & string radius is a critical step in the setup process. A properly setup guitar or bass will have a string radius that matches the fretboard radius for optimal playability and sound.

Measuring your Fretboard Radius has Never Been Easier

With strings off, you can determine your fretboard radius by measuring the fretboard at the last fret using your radius gauge. You know you have the correct radius when the gauge fits the fretboard perfectly, not rocking in the middle, or sitting on the ends with a gap in the center.

Precision Radius Gauge Set - 2 Pak

The accurate measurements include (7.25”, 9.5”, 10”, 12”, 14”, 15”, 16”, 20”). The premium stainless steel with polished smooth edges combined with laser etched numbers and text ensures years of use.

Unique Black Finish & Instructions

Our unique black finish color was chosen because it makes it easier to see if all the strings are touching the desired radius. It can be really hard to see so the black color contrast with the silver string really helps. Easy to follow instructions on the gauge give you the confidence to get the job done right.

This Gauge is Part of our KEEP IT SIMPLE, SETUP (KISS) Method using our Precision Gauges & Tool Sets

With MusicNomad’s KEEP IT SIMPLE, SETUP (KISS), you measure with the MusicNomad precision gauge for that specific task and then use the corresponding precision MusicNomad tool set to make the adjustment. Easy to follow step-by-step simplified instructions and videos for each step in the setup process. Not only is it fun, but a properly setup guitar takes your playing & sound to a whole new level.

About this manufacture:

MusicNomad Equipment Care launched in 2010 and has products in over 1000 US Dealers and 40+ countries. Their guitar, drum and cymbal care products are used in the factories of Suhr, Knaggs, Kala, Tom Anderson and Eastman Strings in addition to DW Drum and more. MusicNomad has Surface Care and Repair Tool products for Guitar, Drum and Cymbal, Band and Orchestra and Piano and Keyboard equipment along with an extensive line of Humidification care products. A portion of all equipment care sales contributes money to help musicians through their giving back initiatives such as One For Music, Guitar Tracker and MusicNomad website.

StewMac Understring Radius Gauge Tool, Set of 9, Standard Width for Guitar Setup, Stainless Steel

Based on 54 reviews Check latest price

Product description

Fast, accurate bridge saddle adjustment.

Each of these unique gauges has an accurately radiused arc on both the top and bottom surfaces, and is shaped to fit easily under the strings.

Use the bottom curvature to determine your fretboard radius, and the matching top curvature becomes a reference for setting string saddle heights for best playability.

Low profile fits tight spots. The slim shape of our understring gauges allow you to read the fretboard radius even with the strings on! This is also handy for matching pickup polepiece heights to the arc of the strings. And setting bridge saddles is easier than ever.

Standard width 6-string guitars and most 4-string basses—spans a string spread up to 2-5/8" (66.68mm).

The set of 9 gauges includes:

7-1/4", 9-1/2", 10", 12", 14", 15", 16", 17" and 20" radii.

Stainless steel.

  • Fast, accurate bridge saddle adjustment
  • Low profile fits tight spots: the slim shape of our understring gauges allow you to read the fretboard radius even with the strings on
  • Set of 9 gauges includes: 7-1/4", 9-1/2", 10", 12", 14", 15", 16", 17" and 20" radii
  • Spans string spreads up to 2-5/8" (66.68mm), ideal for 4-string, 5-string, and many 6-string basses; they'll also handle 7-string and 8-string guitars
  • Made of durable stainless steel

Starrett S167MCHZ Combined 167MB And S167MAH Radius Gauges Inch Set With Holder, Satin Finish, 0.5-15mm Range, 0.5mm And 1mm Increments, 22 Gauges

Starrett

Based on 1 reviews Check latest price

Product description

The set includes ranging from 0.5-7mm ( 0.5mm increment) and 8-15mm ( 1mm increment), 22 gauges in set. Two slots are provided in the holder permitting gages to be held at 30 degree or 45 degree, either square in the slot or tipped to one side. The holder is 4" (100mm) long, providing good reach and balance. The set is furnished in an attractive case, providing complete protection and easy, instant selection of the right gauge size for the job.

  • Made of satin finish stainless steel rust and stain resistant
  • Each gauges are clearly marked with its radius
  • Each gauge has five different gaging surfaces for both convex and concave radii
  • All gauges have precision finished radii with extra smooth, accurate edges

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