Talk:3047: Rotary Tool - Revision history

Denver87: discussing added column for bit diameter

2025-02-24T16:21:47Z

discussing added column for bit diameter

Firestar233 at 06:01, 24 February 2025

2025-02-24T06:01:15Z

172.69.109.172 at 21:56, 7 February 2025

2025-02-07T21:56:24Z

Mr.Dude: Question about launching the telescope and what torque would be needed to achieve Mach 8

2025-02-07T17:20:56Z

Question about launching the telescope and what torque would be needed to achieve Mach 8

Rps: 16 rpm

2025-02-07T16:59:43Z

16 rpm

172.69.79.139 at 21:15, 6 February 2025

2025-02-06T21:15:42Z

PRR: drill speed

2025-02-06T19:08:17Z

drill speed

172.70.247.92: question

2025-02-06T17:21:10Z

question

141.101.76.73: rotation or revolution?

2025-02-06T16:41:22Z

rotation or revolution?

162.158.134.199: 0.00070 is right

2025-02-06T13:58:00Z

0.00070 is right

← Older revision		Revision as of 16:21, 24 February 2025
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	Should we list the rotor diameters to achieve the mach 8 speed mentioned in the title text in the table? I don't think that we should. [[User:Firestar233\|guess who]] ([[User talk:Firestar233\|if you desire conversing]] \| [[Special:Contributions/Firestar233\|what i have done]]) 06:01, 24 February 2025 (UTC)		Should we list the rotor diameters to achieve the mach 8 speed mentioned in the title text in the table? I don't think that we should. [[User:Firestar233\|guess who]] ([[User talk:Firestar233\|if you desire conversing]] \| [[Special:Contributions/Firestar233\|what i have done]]) 06:01, 24 February 2025 (UTC)
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		+	I (obviously since I worked it all out) think it is in the spirit of the ridiculous idea of the comic and XKCD generally to do these calculations. That said, I'm getting different numbers than your update to make it Mach 8. [[User:Denver87\|Denver87]] ([[User talk:Denver87\|talk]]) 16:21, 24 February 2025 (UTC)
		+	:I get the following: 4,799au, 74,866km, 37,733km, 3,144km, 52.4km, 1,588m, 1,165m, 728m, 175m, 34.9m, 21.0m, 149.7cm, 87.3cm, 174.7mm. [[User:Denver87\|Denver87]] ([[User talk:Denver87\|talk]]) 16:21, 24 February 2025 (UTC)
		+	::Happy to share calculation notes, but here's the example for the dental drill: 300,000rpm = 5,000 rps; diameter of: 174.7mm --> circumference of: pi * 174.7mm = 548.8mm; 548.8mm * 5000rps = 2,744,000mm/sec = 2744m/sec; Mach 8 = 8 * 343m/sec = 2744m/sec. [[User:Denver87\|Denver87]] ([[User talk:Denver87\|talk]]) 16:21, 24 February 2025 (UTC)
		+	:::If you agree with the calculations, one of us can at least update it. [[User:Denver87\|Denver87]] ([[User talk:Denver87\|talk]]) 16:21, 24 February 2025 (UTC)

← Older revision		Revision as of 06:01, 24 February 2025
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	The latest NMR CPMAS probes send their rotors to go at 9.6 Mrpm, M=mega. [https://www.bruker.com/en/products-and-solutions/mr/nmr/probes/Solids-Probes.html] --[[Special:Contributions/172.69.109.172\|172.69.109.172]] 21:56, 7 February 2025 (UTC)		The latest NMR CPMAS probes send their rotors to go at 9.6 Mrpm, M=mega. [https://www.bruker.com/en/products-and-solutions/mr/nmr/probes/Solids-Probes.html] --[[Special:Contributions/172.69.109.172\|172.69.109.172]] 21:56, 7 February 2025 (UTC)
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		+	Should we list the rotor diameters to achieve the mach 8 speed mentioned in the title text in the table? I don't think that we should. [[User:Firestar233\|guess who]] ([[User talk:Firestar233\|if you desire conversing]] \| [[Special:Contributions/Firestar233\|what i have done]]) 06:01, 24 February 2025 (UTC)

← Older revision		Revision as of 21:56, 7 February 2025
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	:: "''why are dental drill speeds so high?''" It hurts less. (Are you old enough to remember routine use of belt-driven dental drills?) You can cut a given amount of material (wood, steel, tooth) quickly with heavy force or high speed. Neither is really fun, but hi-speed is generally preferred. --[[User:PRR\|PRR]] ([[User talk:PRR\|talk]]) 19:08, 6 February 2025 (UTC)		:: "''why are dental drill speeds so high?''" It hurts less. (Are you old enough to remember routine use of belt-driven dental drills?) You can cut a given amount of material (wood, steel, tooth) quickly with heavy force or high speed. Neither is really fun, but hi-speed is generally preferred. --[[User:PRR\|PRR]] ([[User talk:PRR\|talk]]) 19:08, 6 February 2025 (UTC)
	:::Although some materials behave badly to heat (either work-hardening, for some alloys, or melting/burning, like plastics) and that's why variable-speed hand-drills/etc usefully have low speeds (for essentially the same force, when that's done via reostat rather than an actual gearbox). On the few occasions I've had my teeth drilled, I'm pretty sure I've detected the pungent smell of fried tooth-fragments, but it was nothing like as strong as smelling my own nose-flesh being burnt one of the times I had it cauterised to try (and fail) to prevent excessive nosebleeds. [[Special:Contributions/172.69.79.139\|172.69.79.139]] 21:15, 6 February 2025 (UTC)		:::Although some materials behave badly to heat (either work-hardening, for some alloys, or melting/burning, like plastics) and that's why variable-speed hand-drills/etc usefully have low speeds (for essentially the same force, when that's done via reostat rather than an actual gearbox). On the few occasions I've had my teeth drilled, I'm pretty sure I've detected the pungent smell of fried tooth-fragments, but it was nothing like as strong as smelling my own nose-flesh being burnt one of the times I had it cauterised to try (and fail) to prevent excessive nosebleeds. [[Special:Contributions/172.69.79.139\|172.69.79.139]] 21:15, 6 February 2025 (UTC)
		+
		+	The latest NMR CPMAS probes send their rotors to go at 9.6 Mrpm, M=mega. [https://www.bruker.com/en/products-and-solutions/mr/nmr/probes/Solids-Probes.html] --[[Special:Contributions/172.69.109.172\|172.69.109.172]] 21:56, 7 February 2025 (UTC)

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 :Its 0.017 RPM for the minute hand. The minute hand revolves once per hour or at 1/60 RPM ≈ 0,017 RPM --[[Special:Contributions/172.71.148.59|172.71.148.59]] 18:14, 5 February 2025 (UTC)
 ::Ohhh that makes sense I didn't think about it like that [[User:Midnightvortigaunt|Midnightvortigaunt]] ([[User talk:Midnightvortigaunt|talk]]) 19:27, 5 February 2025 (UTC)
 How come the comment above is invisible to me?  [[Special:Contributions/172.68.245.229|172.68.245.229]] 18:03, 5 February 2025 (UTC)

← Older revision		Revision as of 16:59, 7 February 2025
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	'''TRIVIA''' 16 2/3 RPM phonographs were used for some voice-recorings back in the day. [[Special:Contributions/172.68.26.24\|172.68.26.24]] 21:01, 5 February 2025 (UTC)		'''TRIVIA''' 16 2/3 RPM phonographs were used for some voice-recorings back in the day. [[Special:Contributions/172.68.26.24\|172.68.26.24]] 21:01, 5 February 2025 (UTC)
		+	: My parent's old record player (60's, probably) had 4 possible speeds: 16, 33, 45, 78. By the early 80's the current ones only had 33 and 45. [[User:Rps\|Rps]] ([[User talk:Rps\|talk]]) 16:59, 7 February 2025 (UTC)

	'''Album''' goes back to stacks of 78s. A symphony or opera would be 2, 3, 4 or more disks. They were bound like a photo-album with a leaf for each disk. '''"78"''' wasn't "standardized" until the format was fading. ''3600-rpm motor and 46-tooth gear'' is incomplete (one tooth gear??) Early discs were from 60 to 130 rpm. Users would adjust speed by ear (also to ease pitch-matching for karaoke). Only as LPs arrived did someone invent the number "78.26 rpm" (no recordplayer and few lathes of the period were near that accurate). --[[User:PRR\|PRR]] ([[User talk:PRR\|talk]]) 02:34, 6 February 2025 (UTC)		'''Album''' goes back to stacks of 78s. A symphony or opera would be 2, 3, 4 or more disks. They were bound like a photo-album with a leaf for each disk. '''"78"''' wasn't "standardized" until the format was fading. ''3600-rpm motor and 46-tooth gear'' is incomplete (one tooth gear??) Early discs were from 60 to 130 rpm. Users would adjust speed by ear (also to ease pitch-matching for karaoke). Only as LPs arrived did someone invent the number "78.26 rpm" (no recordplayer and few lathes of the period were near that accurate). --[[User:PRR\|PRR]] ([[User talk:PRR\|talk]]) 02:34, 6 February 2025 (UTC)

← Older revision		Revision as of 21:15, 6 February 2025
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	:: "''why are dental drill speeds so high?''" It hurts less. (Are you old enough to remember routine use of belt-driven dental drills?) You can cut a given amount of material (wood, steel, tooth) quickly with heavy force or high speed. Neither is really fun, but hi-speed is generally preferred. --[[User:PRR\|PRR]] ([[User talk:PRR\|talk]]) 19:08, 6 February 2025 (UTC)		:: "''why are dental drill speeds so high?''" It hurts less. (Are you old enough to remember routine use of belt-driven dental drills?) You can cut a given amount of material (wood, steel, tooth) quickly with heavy force or high speed. Neither is really fun, but hi-speed is generally preferred. --[[User:PRR\|PRR]] ([[User talk:PRR\|talk]]) 19:08, 6 February 2025 (UTC)
		+	:::Although some materials behave badly to heat (either work-hardening, for some alloys, or melting/burning, like plastics) and that's why variable-speed hand-drills/etc usefully have low speeds (for essentially the same force, when that's done via reostat rather than an actual gearbox). On the few occasions I've had my teeth drilled, I'm pretty sure I've detected the pungent smell of fried tooth-fragments, but it was nothing like as strong as smelling my own nose-flesh being burnt one of the times I had it cauterised to try (and fail) to prevent excessive nosebleeds. [[Special:Contributions/172.69.79.139\|172.69.79.139]] 21:15, 6 February 2025 (UTC)

← Older revision		Revision as of 19:08, 6 February 2025
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	The question I have is: why are dental drill speeds so high? [[Special:Contributions/172.70.247.92\|172.70.247.92]] 17:21, 6 February 2025 (UTC)		The question I have is: why are dental drill speeds so high? [[Special:Contributions/172.70.247.92\|172.70.247.92]] 17:21, 6 February 2025 (UTC)
		+
		+	:: "''why are dental drill speeds so high?''" It hurts less. (Are you old enough to remember routine use of belt-driven dental drills?) You can cut a given amount of material (wood, steel, tooth) quickly with heavy force or high speed. Neither is really fun, but hi-speed is generally preferred. --[[User:PRR\|PRR]] ([[User talk:PRR\|talk]]) 19:08, 6 February 2025 (UTC)

← Older revision		Revision as of 17:21, 6 February 2025
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	The table says that 0.00070 ''"seems off; a sidereal day is 23.93 hours"''. That's just because (like all of the other settings) 0.00070 is quoted with only 2 significant digits. Every period between 23.64 and 23.98 hours would round to 0.00070 RPM. [[Special:Contributions/162.158.134.199\|162.158.134.199]] 13:58, 6 February 2025 (UTC)		The table says that 0.00070 ''"seems off; a sidereal day is 23.93 hours"''. That's just because (like all of the other settings) 0.00070 is quoted with only 2 significant digits. Every period between 23.64 and 23.98 hours would round to 0.00070 RPM. [[Special:Contributions/162.158.134.199\|162.158.134.199]] 13:58, 6 February 2025 (UTC)
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		+	The question I have is: why are dental drill speeds so high? [[Special:Contributions/172.70.247.92\|172.70.247.92]] 17:21, 6 February 2025 (UTC)

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 '''TABLE REQUEST'''
 When someone uploads a table, I'd like to recommend a second column for the frequency / reciprocal of the speed. "0.000000000073 minutes" is one every 13.7 billion minutes, or ~26,000 years. Thanks! [[Special:Contributions/172.70.46.107|172.70.46.107]] 20:20, 5 February 2025 (UTC)
 '''TRIVIA''' 16 2/3 RPM phonographs were used for some voice-recorings back in the day. [[Special:Contributions/172.68.26.24|172.68.26.24]] 21:01, 5 February 2025 (UTC)

← Older revision		Revision as of 13:58, 6 February 2025
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	I feel like there was a lost opportunity to have Dr. Who's Sonic Screwdriver on the list. Maybe the rpms are unknown.[[Special:Contributions/162.158.159.107\|162.158.159.107]] 13:05, 6 February 2025 (UTC)		I feel like there was a lost opportunity to have Dr. Who's Sonic Screwdriver on the list. Maybe the rpms are unknown.[[Special:Contributions/162.158.159.107\|162.158.159.107]] 13:05, 6 February 2025 (UTC)
		+
		+	The table says that 0.00070 ''"seems off; a sidereal day is 23.93 hours"''. That's just because (like all of the other settings) 0.00070 is quoted with only 2 significant digits. Every period between 23.64 and 23.98 hours would round to 0.00070 RPM. [[Special:Contributions/162.158.134.199\|162.158.134.199]] 13:58, 6 February 2025 (UTC)