Tables and Dimensions Of Useful Things

No 3d printing inventor would get far without good references.

Scroll to the bottom for tables.

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[PARENTDIR] Parent Directory - [   ] 1963_FDR_F2018.pdf 2019-01-15 18:03 1.0M [IMG] 200-spring-assortment.jpg 2017-07-12 18:02 280K [IMG] 2x16lcd-dimension.jpg 2017-07-12 18:02 68K [IMG] 4-11-16-ovenbox.png 2019-02-05 17:15 57K [IMG] camera-plate.gif 2015-10-15 11:42 23K [IMG] camera-screw-odd.jpg 2019-02-01 18:23 84K [IMG] camera-screw-rc5.jpg 2019-02-01 18:41 80K [IMG] decora-plate.jpg 2017-01-07 18:48 64K [IMG] drive-gear-mk7.jpg 2015-01-26 20:43 61K [IMG] fan-40mm-dimension.gif 2017-07-12 18:03 22K [IMG] fan-80mm-dimension.jpg 2013-05-03 06:48 45K [IMG] galvanic-compatibility.png 2020-04-04 11:14 98K [IMG] linear-lm8uu-dimension.jpg 2016-03-31 09:06 43K [IMG] makerbot-endswitch.jpg 2017-07-12 18:20 42K Top secret. Ssssh. [IMG] metric-nut-dimension.gif 2017-07-12 18:03 3.0K [TXT] metric2.html 2020-07-29 19:47 9.5K [IMG] microswitch-dimension.jpg 2017-07-12 18:03 25K [IMG] motor-nema17-dimension.jpg 2016-03-02 21:35 15K [IMG] motor-nema23-dimension.jpg 2013-03-30 07:41 52K [IMG] nema10-dimensions.jpg 2017-03-13 21:12 40K Measurements and Tables [   ] oring-imperial.pdf 2017-06-22 18:30 228K [   ] oring-metric.pdf 2017-06-22 18:30 722K [   ] popbottle-pco1810.pdf 2017-03-13 11:29 163K [   ] popbottle-pco1881.pdf 2017-03-13 11:29 499K [IMG] pushfit-male-diagram.jpg 2017-07-13 22:18 46K thingiverse.com/thing:2434393 [IMG] pushfit-male-dimension.jpg 2017-07-13 22:18 125K thingiverse.com/thing:2434393 [IMG] RC5_dimensions.png 2019-02-06 17:21 5.7K Measurements and Tables [IMG] thread-diagram.png 2019-01-15 16:56 23K [IMG] thread-profile-acme-interna..> 2018-06-19 21:27 12K [IMG] thread-profile-acme-stub.jpg 2014-10-05 06:30 92K [IMG] thread-profile-acme.jpg 2019-01-03 07:33 16K [IMG] thread-profile-bsp.jpg 2016-04-17 13:48 43K [IMG] thread-profile-nh.jpg 2018-09-15 22:46 559K [IMG] thread-profile-nh.png 2019-01-15 18:02 106K [IMG] thread-profile-npsh.jpg 2018-05-31 15:04 9.3K [IMG] thread-profile-npt.gif 2018-04-11 21:12 25K [IMG] thread-profile-trapezoid.jpg 2016-07-27 13:28 49K [IMG] thread-profile-uts.png 2017-07-23 15:15 13K

Tables

All sizes except threads in mm.

Common Metric Bearings, mm
TypedDBWhere / Why Used
6088227Skate bearing, cheap easy and strong. Used everywhere. Fits 5/16" rod very well.
6255165Extruders, gearboxes, little things.
6355196Bigger, cheaper, uglier 625
6244135Can kludge to fit #8 SAE bolts.
63331353mm bearings were sometimes used in direct drive extruders. Rare and expensive.
6233104
603395

Linear Bearings I Have Known
TypedDLNotes
LM8UU81524Surprisingly, the go-to for hobby projects. 8mm rod is very flimsy.
LM10UU101929 
LM12UU122130 
KH1228121928 Used in the mutated darwin sold by BitsFromBytes. The 12mm rods were the best part of it.

Common Screws in North America
TypeKnown ByUse
M3-0.5Little Computer ScrewCDROMs, laptop HDDs, some computer cases, etc. Metric, in my country!?
#4-40VGA ThumbscrewVGA, DVI, RS232, fit-nothing junkpile lingerers.
#6-32Big Computer ScrewFull-size HDD's, computer cases, electric outlet covers. Extremely common.
#8-32Little Electric Panel Screw 
#10-32Big Electric Panel Screw 
3/8", 7/16", 5.5mmFan ScrewSelf-tapping screw. No clear standard but the 4.3mm-ish holes they jam into.
3/8" 32TPICoax connector, F Connector
1/4" 36TPISMA connector, wifi connector
1 1/16"-11.5 NHGarden Hose, North AmericaSee NH below.
3/4"-14Garden Hose, Europe
3/4"-5 ACMEBroom HandleTolerances vary wildly. See here.
PCO1881Pop-bottleSee file for far too many details.

Calculated Profiles for Truncated Threads
Type A H1 H2 Calculated Coordinates
P1P2P3
UTS 60° (3/8)*0.8660 (1/4)*0.8660 0.250000, 0.00000 0.562498, 0.54125 0.687509, 0.54125
Unified Thread Standard -- all normal nuts and bolts, metric or not. 0.8660 is the height of the 60° triangle.
NH 60° (3/8)*0.8660 (3/8)*0.8660 0.1250, 0.0000 0.5000, 0.6495 0.6250, 0.6495
"North American garden hose". Surprisingly similar to UTS but more symmetric. Again, 0.8660 is the height of the 60° triangle.
Trapezoidal 30° 1/4 1/4 0.3660,0.0000 0.5000,0.5000 0.8660,0.5000
"Metric ACME" is probably this.
ACME 29° 1/4 1/4 0.3707,0.0000 0.5000,0.5000 0.8707,0.5000
Leadscrews with imperial measures are probably this.
Stub ACME 29° 3/203/20 0.422415, 0.000000 0.500000, 0.300000 0.922415, 0.300000
Is there a 'stub metric' too? It is a mystery.
BSPP 55° 0.320 0.320 0.166667, 0 0.5, 0.640327 0.666667, 0.640327
Note this is the parallel thread profile, not the tapered one. BSPP is technically rounded, not truncated, but technically, that's often ignored too since it doesn't matter, BSPP not being self-sealing.
NPT 60° 0.400 0.400 0.0381198, 0 0.508988, 0.815568 0.547108, 0.815568
NPT is of course special: It's tapered an exact 1.78333°, equivalent to 1/16" rise over 1" run. The given profile has been offset to include that taper without altering any tooth angles, but there is an offset that must be applied in use as well. For every turn of thread, you must add tan(1.78333°) to the Y value. So, P4 would be [0,0.0311351] instead of [0,0], etc.
OpenSCAD Formulae
function profile(A,H2,H1)=let(M=tan(90-(A/2)),
        X1=((M/2)-(H2*2))/M,
        X2=((M/2)+(H1*2))/M,
        OFF=-X1*M) [
    [X1+X1,OFF + M*X1],
    [X1+X2,OFF+M*X2],
    [X1+2-X2,OFF+M*X2] ]/2;

THREAD_UTS=profile(60, (3/8)*0.8660, (1/4)*0.8660);
THREAD_NH=profile(60, (3/8)*0.8660, (3/8)*0.8660);
THREAD_ACME=profile(29, 1/4, 1/4);
THREAD_TRAP=profile(30, 1/4, 1/4);

The Great Table of NPT Pipe Sizes, which tragically disappeared off the internet one day.
Nominal Pipe Size (inch) Number of threads per inch Outside Diameter (inch) Outside Diameter (mm) Pitch of thread Depth of thread Truncation, max.”** Pitch diameter at plane of hand-tight engagement Length from end of pipe to plane of hand-tight engagement Length of useful thread Length of washout thread Pitch Diameter at Beginning of External Thread Start (inch) Effective Thread, External Diameter (inch)
        P h l E L1 L2      
        in mm in mm in mm in mm in Threads in Threads in Threads    
1⁄16 27 0.3125 7.938 0.03704 0.941 0.02963 0.753     0.28118   0.16   0.2611   0.1285 3.47 0.27118 0.28750
1/8" 27 0.405 10.287 0.03704 0.941 0.02963 0.753 0.00360 0.091 0.37360 9.489 0.162 4.36 0.2639 7.12 0.1285 3.47 0.36351 0.38000
1/4" 18 0.540 13.716 0.05556 1.411 0.04444 1.129 0.00490 0.124 0.49163 12.487 0.228 4.10 0.4018 7.23 0.1928 3.47 0.47739 0.50250
3/8" 18 0.675 17.145 0.05556 1.411 0.04444 1.129 0.00490 0.124 0.62701 15.926 0.240 4.32 0.4078 7.34 0.1928 3.47 0.61201 0.63750
1/2" 14 0.840 21.336 0.07143 1.814 0.05714 1.451 0.00560 0.142 0.77843 19.772 0.320 4.48 0.5337 7.47 0.2478 3.47 0.75843 0.79179
3/4" 14 1.050 26.670 0.07143 1.814 0.05714 1.451 0.00560 0.142 0.98887 25.117 0.339 4.75 0.5457 7.64 0.2478 3.47 0.96768 1.00179
1" 11.5 1.315 33.401 0.08696 2.209 0.06957 1.767 0.00630 0.160 1.23863 31.461 0.400 4.60 0.6828 7.85 0.3017 3.47 1.21363 1.25630
1-1/4" 11.5 1.660 42.164 0.08696 2.209 0.06957 1.767 0.00630 0.160 1.58338 40.218 0.420 4.83 0.7068 8.13 0.3017 3.47 1.55713 1.60130
1-1/2" 11.5 1.900 48.260 0.08696 2.209 0.06957 1.767 0.00630 0.160 1.82234 46.287 0.402 4.83 0.7235 8.32 0.3017 3.47 1.79609 1.84130
2" 11.5 2.375 60.325 0.08696 2.209 0.06957 1.767 0.00630 0.160 2.29627 58.325 0.436 5.01 0.7565 8.70 0.3017 3.47 2.26902 2.31630
2-1/2" 8 2.875 73.025 0.12500 3.175 0.10000 2.540 0.00780 0.198 2.76215 70.159 0.682 5.46 1.1375 9.10 0.4337 3.47 2.71953 2.79062
3" 8 3.500 88.900 0.12500 3.175 0.10000 2.540 0.00780 0.198 3.38850 86.068 0.766 6.13 1.2000 9.60 0.4337 3.47 3.34062 3.41562
3-1/2" 8 4 101.600 0.12500 3.175 0.10000 2.540 0.00780 0.198 3.88881 98.776 0.821 6.57 1.2500 10.00 0.4337 3.47 3.83750 3.91562
4" 8 4.5 114.300 0.12500 3.175 0.10000 2.540 0.00780 0.198 4.38712 111.433 0.844 6.75 1.3000 10.40 0.4337 3.47 4.33438 4.41562
5" 8 5.563 141.300 0.12500 3.175 0.10000 2.540 0.00780 0.198 5.44929 138.412 0.937 7.50 1.4063 11.25 0.4337 3.47 5.39073 5.47862
6" 8 6.625 168.275 0.12500 3.175 0.10000 2.540 0.00780 0.198 6.50597 165.252 0.958 7.66 1.5125 12.10 0.4337 3.47 6.44609 6.54062
8" 8 8.625 219.075 0.12500 3.175 0.10000 2.540 0.00780 0.198 8.50003 215.901 1.630 8.50 1.7125 13.70 0.4337 3.47 8.43359 8.54062
10" 8 10.750 273.050 0.12500 3.175 0.10000 2.540 0.00780 0.198 10.62094 296.772 1.210 9.58 1.9250 15.40 0.4337 3.47 10.54531 10.66562
12" 8 12.750 323.850 0.12500 3.175 0.10000 2.540 0.00780 0.198 12.61781 320.493 1.360 10.88 2.1250 17.00 0.4337 3.47 12.53281 12.66562
14" 8 14 355.600 0.12500 3.175 0.10000 2.540 0.00780 0.198 13.87262 352.365 1.562 12.50 2.2500 18.00 0.4337 3.47 13.77500 13.91562
16" 8 16 406.400 0.12500 3.175 0.10000 2.540 0.00780 0.198 15.87575 403.244 1.812 14.50 2.4500 19.60 0.4337 3.47 15.76250 15.91562
18" 8 18 457.200 0.12500 3.175 0.10000 2.540 0.00780 0.198 17.87500 454.025 2.000 16.00 2.6500 21.20 0.4337 3.47 17.75000 17.91562
20" 8 20 508.000 0.12500 3.175 0.10000 2.540 0.00780 0.198 19.87031 504.706 2.125 17.00 2.8500 22.80 0.4337 3.47 19.73750 19.91562
24" 8 24 609.600 0.12500 3.175 0.10000 2.540 0.00780 0.198 23.68094 606.066 2.375 19.00 3.2500 26.00 0.4337 3.47 23.71250 23.91562