The Independent Scratch Builder
Torque, fasteners, and building from nothing
Covering Component Dimensions And Identification, Mechanical Design And Loads, Npt Pipe Threads, Fastener Installation, Tap Drill Sizes, Threaded Fasteners.
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Morse Taper Sizes Chart: MT0–MT7 Dimensions and Identification
A Morse taper is a shallow, self-holding machine taper. A male tool shank, arbor, or center seats in a female socket with matching geometry. As the parts wedge…
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1350 U Joint Dimensions: Cap Diameter, Width & Measuring Guide
Reviewed August 18, 2026
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Resistance to Overturning Formula: Moments, Lever Arms & FS
The resistance to overturning formula is a moment balance: add the rotational effects that keep a body upright, compare them with the effects that tend to…
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What Size Drill Bit for 1/8 NPT Tap? Q vs. R Sizes
Use the drill size specified by the manufacturer of your exact tap. If you bought a matched tap-and-drill kit, use the drill supplied with that kit unless the…
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Thread Inserts for Metal: Types, Selection & Installation
Thread inserts for metal solve several different problems, but they do not solve them in the same way. A formed-wire coil used to restore a stripped hole in an…
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1/4 20 Drill Size for Tap: #7 Bit, Decimal & Fractional Options
Answer: For a conventional 1/4-20 UNC cutting tap, use a No. 7 drill bit. Its nominal diameter is 0.2010 inch, or approximately 5.11 mm, according to the 6G…
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What Size Drill Bit for 1 4 Tap? 1/4-20 and 1/4-28 Chart
For a standard 1/4-20 UNC cutting tap, use a #7 drill. For a standard 1/4-28 UNF cutting tap, use a #3 drill. The two sizes are not interchangeable because the…
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3 8 NPT Hole Size: 9/16 vs 37/64 Drill Guide
3/8-18 NPT tap-drill comparison
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1/2-13 Tap Drill Bit Size: Use a 27/64-Inch Drill
Quick answer
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How to Use a Riveter Tool: Step-by-Step Guide
A dependable blind-riveted joint comes from compatibility and preparation—not merely squeezing until the mandrel pops. The rivet’s published grip range must…
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M6 Clearance Hole Size: 6.4, 6.6 or 7.0 mm?
By Rowan Blake — garage-shop machine builder Last reviewed: August 8, 2026 Source check: For controlled work, verify dimensions against the engineering drawing…
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Mabuchi Motors Vintage Slot Cars: Identification Guide
Identifying Mabuchi motors in vintage slot cars is rarely a one-clue exercise. Can color may vary with voltage, reseller, application, or later repainting. A…
