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Wirkungsbereich Luftwaermepumpe

Es gibt doch bestimmt Aussagen in welchen Temperaturbersichen Luftwärmepumpen welchen Wirkungsgrad erreichen können. Hat hier jemand Links für mich? Danke

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A New Beginning

I received a piece of 6061 aluminum in the mail and my wife is working today ... guess where I've been ? So far I have the hole for the collet sleeve machined and the bottom side counter bored for the...

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Re: Motors whine when under PWM control

We ran into this same thing as well. We ended up switching our power supply out and it stopped the high pitched sound. good to know chokes can help. going to play around with some ferrite blocks next...

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productivity SMAW 6013 vs 7018

Hi all With more welding experience repairing the hull of a seagoing vessel, the meaning of the wise words of a late mentor who used to contribute a lot on here came to me. I've appended my...

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long caliper

Anyone know where I can get a long - 450mm plus - caliper, preferably digital, for a cheap price, say £50 or so? You can get a decent 150mm one for about a tenner, but longer ones seem to start at...

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Z czego teraz robi siÄ™ papier?

A właściwe chodzi o gazety. 45 lat temu Trybuna Ludu była świetną podpałką w piecu. Zajmowała nie prawie jak benzyna.Teraz rozpalanie współczesnymi gazetami jakby tak po grudzie. Palić toto...

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comment détecter l'origine d'un courant de fuite

Bonsoir, j'ai le problème suivant: je prends du courant quand je touche le corps métallique de ma bouilloire et l'évier en métal. J'ai branché un multimètre sur ce circuit et il y a quelques...

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Re: Wacky Solidworks Toolbox Part Configurations

Hi, I realize that replying to a 20 year old post might be a long shot.. After my colleague opened my network-stored assembly on a fresh install of SolidWorks 2020 SP5.0, some parts have mysteriously...

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Frequently Asked Questions All FAQs »

Convert TIG/stick to MIG?

Hey - So, I have an AHP 200DX (TIG & stick), but there are times when I wish I had a MIG machine. I seriously don't have the room for both. I understand why MIG is CV and the others are CC, but I'm...

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lathe chuck scroll lube?

The Net abounds with answers to what to use, all different, ranging from way oil to antiseize to powdered graphite. Dry molybdenum disulfide in some expensive form seems to be a preferred answer for...

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what epoxy do you use to join delrin parts?

I've got some delrin parts that need joining... what do I use to do it? I heard there was some special epoxy for joining Delrin but I don't have a name or supplier. Anyone? Thanks, Mike

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What type of lock would use this key?

Hi, At the link below is a pic of a key that belonged to my late father. I'm wanting to learn what type of door/cabinet/safe normally uses this type of key, and any comments about the date-range....

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Best epoxy for High powered rocket building ?

I've been using the West Systems fast epoxy kit and I have been very happy with the results. Pumps, exact mixing ratio, less mess. But Giant Laep contends AeroPoxy mixed 1 to 1 is better and cheaper....

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Tool Holders

[PAM] If you're going to be a wise ass, so am I.... blkdrgn@thor> man pam ============================================================================ PAM(3) FreeBSD Library Functions Manual PAM(3)...

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Tig Torch Recommendations?

Hi, I'm finally tired of having to let the air-cooled torch on my Lincoln SW-175 tig cool off. I'll build the radiator/pump for water cooling myself, but which torch are people liking these days? At...

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Mill or lathe?

This question is probably akin to: "How long is a piece of string?". However, having done as much research as I reasonably can and with no local resources to fall back upon I feel compelled to ask...

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What size plasma cutter?

I am getting a new plasma cutter. I have decided on HyperTherm ONLY. I have a Victor smoke wrench for big stuff now, and am considering this for small stuff, including some 20somethingish gauge...

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Clear coat on steel

I want to paint bare new steel with a clear coat. The metal needs to be seen in its raw state. The item will be exposed to weather. I have tried three different products so far and none lasted more...

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Marine batteries

After reading many nearly useless reviews I bought the only SLI31MDP that Batteries+Bulbs had, and then a hopefully similar/identical O'Reilly Super Start 31DCM. AFAICT they are both made by East Penn...

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120V/240V AC Output Quality Of Welders

Has anyone hooked up an oscilloscope to the AC outlets of an engine driven welder? How clean is the output? Could you run a computer, radio, television, or laser printer off it? __________________...

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Solved Issues All Solved »

Problem with Lincoln Ranger 8 - no output (2023 Update)

I have the opportunity to purchase a 3 year old Lincoln Ranger 8 welder/generator with 600 hours. Apparently, the unit worked well for 3 years. However, while powering a refrigerator and some lamps,...

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Harrison L5 headstock oil (2023 Update)

How much oil do I fill the headstock of a Harrison L5 with? I have a recent aquirement of a Harrison L5 Mk2 lathe, I estimate made between 1946-1947, its sat for some years and the headstock oil has...

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Delrin and Stainless 1/4 - 20 all-thread question

Greetings All, I'm looking for a ball park, back of the envelope, best guesstimate for this situation.. :) 3/4 cube of white Delrin with a 1/4 -20 threaded hole down the middle, thru which is screwed...

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Kennedy tool box drawer felt replacement question - how to stretch felt out

I am going to put new 'felt' in the drawers of a Kennedy tool box. I would appreciate it if someone, who has done this successfully, could advise me as the these best type of glue to use? Also, are...

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lead arsenic alloy - where a person might get a single ingot or a few pounds?

I'm trying to find a source for some lead-arsenic alloy. I want to use a lead-arsenic or tin-arsenic to increase the arsenic content of the lead I want to cast into bullets. Yes, I am already aware of...

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Filling a shell

I have a rather shapely part that is shelled out .030 thick. Now, I need to create a new filler part that fills the inside volume of the shelled part. What's the best method to do this? TIA. Jay

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Flatten Spline

I need to be able to flatten an extrusion defined by a spline. This will be used to create a manufacturing template used to construct a light reflector. The curve of the reflector is defined by a...

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Security Mfg Corp key blan k

One of my customers wanted a duplicate mailbox key but I couldn't find a blank that worked. I changed out the lock and told her when I found the right blank I'd put her's back. I don't need bitting...

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Stuck Medeco lock - what to do? (2022 Update)

Oh boy. Guess what? It turned out that when I take the key out from the INNER lock, there's no problem at all with locking it from the OUTSIDE. So the graphite likely didn't do any damage! (Granted, I...

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Can't remove key from re-keyed deadbolt

I'm installing new locks and deadbolts on a house. I bought Schlage locks at home Depot, they had to rekey the deadbolts, one of which is double keyed. The key slides in smooth and the deadbolt turns...

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Welding/brazing diesel engine block

I have an old log skidder which has a long (around 24 inch) crack line running most of the length of the water jacket which is cast into the block. It was repaired years ago by the previous owner with...

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Welding an engine block

Hi everyone, Have any of you had any success welding on an engine block? The engine is a Perkins diesel in a Hyster forklift. The crack is in the cooling jacket of the block. Thanks, Shawn

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Categories

Featured more »

Harbor Freight Tools' Quality | Any way to tell from a brand name which of the tools in Harbor Freight are quality? Chicago Electric - obviously crap. Is this a Harbor Freight brand?

Harbor Freight Tools' Quality

Any way to tell from a brand name which of the tools in Harbor Freight are...

Laser cutting | I want to have some flat stainless, brass, and copper sheeting cut, and I will furnish the patterns. Steve

Laser cutting

Has anyone had any parts laser cut? Is it expensive? I want to have some flat...

motor starndards outside NA | It seems foreign industrial motors are usually rated in kW and not horsepower, but I've also never seen clearly marked motor frame sizes on danish machinery like on all m...

motor starndards outside NA

Motors all seem to follow NEMA sizes and standards in North America. What are...

ostrzenie noza | Temat niedawno byl, a ja sie ciagle nie dowiedzialem - czy po kamieniu nalezy noz przesuwac

ostrzenie noza

kuchennego. Temat niedawno byl, a ja sie ciagle nie dowiedzialem - czy po...

mini backhoe | I am trying to collect material and ideas in order to make a mini backhoe. I may never make one, but I am proceeding on the grounds that I will. Before starting in on how...

mini backhoe

I am trying to collect material and ideas in order to make a mini backhoe. I may...

UK users of disposable gas cylinders | I dont know if there's any UK users on here, but I would be interested to know what you do with discarded single use gas cylinders - the small ones which you buy in place...

UK users of disposable gas cylinders

I dont know if there's any UK users on here, but I would be interested to know...

WARNING: Metalworking Revisited - Deburring With Surface Conditioning Products - HARBOR FREIGHT SURPRISE | So people wouldn't find it odd if their Combat Abrasives or their Wen belt grinder performed differently than I described. I am not endorsing or putting down any of the c...

WARNING: Metalworking Revisited - Deburring With Surface Conditioning Products - HARBOR FREIGHT SURPRISE

Off Topic Portion: The warning is for trolls like the one who replied once to...

Making Gear Cutters (Ivan Laws Book) | Law sets out two tables of design information for the cutters, one 20deg pressure angle and the other is at 30deg pressure angle. The design data is normalised at one dia...

Making Gear Cutters (Ivan Laws Book)

I've been reading Ivan Law's book on making gear cutters and he described the...

Making Molds On a POS Manual Mini Mill | I sold my first injection molds made on a tiny Taig CNC milling machine. Compared to a half million dollar Haas mold maker it too was a POS. In the spirit of paying it fo...

Making Molds On a POS Manual Mini Mill

I sold my first injection molds made on a tiny Taig CNC milling machine....

Cutting Silver with a plasma cutter? | Has anyone here ever cut silver with a plasma cutter? Anything I should know? I asked on an art list I hang out on, and no one had ever done it, although everyone seemed ...

Cutting Silver with a plasma cutter?

I happened to be talking to a jeweler who was working on a large piece of 10 ga...

Plasma cutter settings | One thing you might want to get is a 55 gal drum to plasma cut into. I got one set up on Friday and it eliminates much of the mess and the sparks flying all over the plac...

Plasma cutter settings

I can't help you with power settings. I'll be interested in those responses,...

R134a Thread size? | My vacuum pump is outfitted with a 3/4

R134a Thread size?

I want to recharge the refrigerant in my auto air conditioner. I've assembled...