Samvinna
LIST
FEGURÐ OG VELLÍÐAN
HANDVERK
MENNING OG SAGA
SKEMMTUN
UMHVERFI
MATUR OG DRYKKUR
ÖFUGVERKFRÆÐI
VÍSINDI
ÍÞRÓTTIR
TÆKNI
KLÆÐANLEG TÆKNI
Home-Made Screw Micrometer: a Fine-Threaded Bolt and a Paper Dial (Boy Mechanic, 1913)
The Boy Mechanic, Book 1 (1913), p. 130, public domain · Public domain
Penny

Búin til af

Penny

14. nóvember 2026DK
2
0
0
0
0

Home-Made Screw Micrometer: a Fine-Threaded Bolt and a Paper Dial (Boy Mechanic, 1913)

A simple micrometer for measuring thin things: a fine-threaded bolt turns through a nut set in a small wooden bench, a wire pointer soldered to its head sweeps a graduated pasteboard dial, and each turn moves the tip down by one thread.
Byrjandi
Two hours

Leiðbeiningar

1

Reading the dial

Hleð Jupyter-vinnubók…
2

Read the Boy Mechanic

"A simple, fairly accurate, and easily made apparatus of the micrometer form may be constructed."
3

Choose the bolt

Get an iron or brass bolt about 1/4 in across and 2-1/2 in long with as fine a thread as possible, threaded nearly to the head, with its nut. Cut a screwdriver slot in the head.

Efni fyrir þetta skref:

VélskrúfurVélskrúfur1 stykki
SexkantróSexkantró1 stykki

Nauðsynleg verkfæri:

JárnsögJárnsög
SkrúfstykkiSkrúfstykki
4

Make the bench

Clamp two square-cornered wood blocks (about 1 x 3/4 x 2-1/2 in) side by side and nail small pieces across the ends; together they are about 2 in wide. Bore a 1/4 in hole through the centre in the 2 in direction. Unclamp, set the nut into one block in line with the hole, then cut a piece out so the blocks form a little bench. Glue its legs to a thin board about 2-1/2 in square.

Efni fyrir þetta skref:

HarðviðarborðHarðviðarborð1 stykki
NaglarNaglar1 stykki
TrélímTrélím1 stykki

Nauðsynleg verkfæri:

HandsögHandsög
Handsveifarbor með borHandsveifarbor með bor
StangarþvingaStangarþvinga
SporjárnSporjárn
HamarHamar
5

Pointer and dial

Solder a stiff wire about 2 in long to the bolt head at right angles. Cut a disc of heavy pasteboard with a radius equal to the wire, divide its edge into equal spaces, and fix it on top of the bench. Screw the bolt down through the nut.

Efni fyrir þetta skref:

JárnvírJárnvír1 stykki
Tin-blý lóðmálmurTin-blý lóðmálmur1 stykki
Límdur pappiLímdur pappi1 stykki

Nauðsynleg verkfæri:

LóðboltiLóðbolti
ÁttavitiÁttaviti
6

Anvil

Fix a small piece of wood on the base between the bench legs and glue a small piece of metal on it where the bolt meets it.

Efni fyrir þetta skref:

HarðviðarborðHarðviðarborð1 stykki
TrélímTrélím1 stykki
7

Calibrate and measure

Count the threads in one inch of the bolt on a rule: one turn moves the tip one thread. To measure, screw down onto the object, remove it, screw down to the base, and note how far the wire travels over the dial. Turns (with the part of a turn) divided by threads per inch = thickness in inches.

Nauðsynleg verkfæri:

ReglustikaReglustika
8

Troubleshooting

Micrometer troubleshooting.

Flow

Loading...
9

History and honest limits

From **The Boy Mechanic, Book 1** (Popular Mechanics, 1913), p. 130, credited to the Scientific American (checked on the archive.org scan boymechanic0000unse_n5a8). The 1/4-20 bolt and 50-division dial are our example.

Efni

8

Nauðsynleg verkfæri

10

Þessi teikning býr til

Thumbnail
Tímabundinn texti

Míkrómetri

Free

2.061
0

CC0 opinbert ríki

Þessi teikning er gefin út undir CC0. Þér er frjálst að afrita, breyta, dreifa og nota þetta verk í hvaða tilgangi sem er, án þess að biðja um leyfi.

Studdu smiðinn með því að kaupa vörur í gegnum teikningu hans þar sem hann fær þóknun smiða sem seljendur ákvarða, eða búðu til nýja endurskoðun á þessari teikningu og tengdu hana sem tengingu í þinni eigin teikningu til að deila tekjum.

Umræða

(0)

Skrá inn til að taka þátt í umræðunni

Hleður athugasemdum...