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Adjustable bench supply, 3 to 24 V, 3 A
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- Free shipping, US and Australia
- Secure payment
- 30-day returns
Description
Most small bench things want a voltage that is not the one your drawer of wall warts happens to contain. This is one supply with a knob instead of nine adapters with the wrong plugs.
Mains in at 100 to 240 V, adjustable DC out from 3 to 24 V, up to 3 A - the seller rates the whole thing at 72 W, which is what 24 V and 3 A comes to. US plug. Ships with a screw-terminal adapter, alligator clips and a set of barrel tips, so you can wire bare leads or plug a standard jack.
Why current headroom matters more than volts
People buy supplies by voltage and then get bitten by current. A motor pulls far more current starting than running, and a supply at its limit sags - the voltage drops, the motor slows exactly when you need it not to, and it feels like the tool is weak. Three amps of headroom is the difference between a supply that holds its voltage under load and one that gives up.
That is also why this is a knob and not a switch: you can bring a new circuit up from 3 V and watch what it does, instead of connecting 12 V and finding out all at once.
Where it stops
Do not run the Mikrabench drill press above 12 volts. Its own adapter is marked 3 to 12 V and that is what the motor is rated for. This supply reaches 24, and 24 V into a 12 V motor will spin it far past its design speed and cook the windings. If you use this with the machine, set 12 and leave it. We would rather say this plainly than sell you a supply that ruins a machine we also sold you.
There is a red readout next to the knob that shows what you have set. Read it as the supply's own opinion of its output - it is a built-in indicator, not a calibrated meter, and we have not checked one against a multimeter. If a tenth of a volt matters to your circuit, measure at the plug.
There is no current limit you can set. It will deliver up to 3 A into a short as happily as into a load, which is what a fuse is for.
3 A is a bench figure, not a workshop figure. It runs small motors, LED strip, test circuits and soldering aids. It will not run anything that heats.
Shipping and returns
Shipping is free on every order, to the United States and to Australia, tracked, with no minimum. Orders are processed within 2 business days.
After that the number depends on what you bought, and the line under the price gives it. The drill press takes about 2 weeks because we do not hold stock of it, and bits, punches and small consumables take about 6 to 10 business days.
Australia is not slower. An earlier version of this page said three to four weeks, on the assumption that further away means longer. It is the opposite: the parcels leave China, and China is closer to Sydney than to Philadelphia. Our carrier quotes 6 to 10 days to Australia against 4 to 7 to the United States, and it costs us less to send. So the Australian figures here are the same as the American ones. What we cannot claim is that we have watched it happen - we have not shipped an Australian order yet, and the day we have real tracking from there these become our numbers instead of the carrier's.
On the plug, we have to correct ourselves. This page used to say our supplier sells an Australian-plug version of the adapter at the same price. That was wrong, and we are leaving the correction here rather than deleting the sentence. It came from a different machine in a different supplier's catalogue. The listing this machine actually comes from has no plug option at all. We asked the supplier straight out and they answered that they fit a compatible plug for the destination country - which is an answer, but it is theirs, not something we have checked. The plug block further up this page says what we will do if what arrives does not fit your wall.
You get a tracking number by email as soon as the parcel is scanned, not before. A link that sits at label created for a few days is normal on this route.
Returns: 30 days from delivery, unused and in its packaging. Nothing is excluded - there is no rule here about sale items. If it arrived damaged or does not hold tolerance, we pay the return label. If you simply changed your mind, the return postage is yours and the price of the item comes back in full. Email support@arvonelle.com before sending anything back.
Before you order
Will it plug into my outlet? Voltage, yes: the supply is rated 100 to 240 V, which covers both 120 V American mains and 230 V Australian mains, so no converter and no transformer. The plug is the part we cannot promise yet. The machine has no plug option we can select when we order it. We asked our supplier and they answered in writing that they fit a compatible plug for the destination country - we are quoting them, not claiming it, because we have not yet had one in our hands. Our sample is on order. If what arrives will not go into your wall, tell us: we post you the right adapter free, or refund you in full with the postage on us. An earlier version of this answer said the supplier sells a separate US-plug and Australian-plug version at the same price. That was wrong and came from a different machine; we are leaving the correction here instead of quietly deleting it.
Can it mill? As it ships, no. Milling needs an ER11 collet spindle in place of the drill chuck, because side load pulls a bit out of a chuck. That spindle is a real part and we are sourcing it. Until it is on the shelf we do not sell collets or end mills either.
Do your vises fit the press? The ones meant for drilling do - the drill press vise and the brass vise on its XY stage bolt to the base as it comes. The bench vises do not bolt down and must not go under a spinning bit. The engraving ball vise and the toolmaker's vise are bench tools too. Every page says which it is.
Do I pay tax or duty? In the United States, sales tax is added at checkout where your state charges it, and the total you see is the total. In Australia, consignments under AUD 1,000 normally carry 10% GST collected by sellers whose Australian turnover passes AUD 75,000 a year; we are well below that, so nothing is added at checkout and nothing should be asked of you on delivery. If a carrier ever asks you for a fee on a parcel from us, do not pay it - send us the notice first and we will sort it out with you. We are not going to claim we cover all duties everywhere. We cover what we control and we tell you about the rest.
What if a part breaks? For twelve months, tell us which part and we post a new one free. No return, no inspection, no photograph of the packaging. That applies in Australia too.
Can I cancel? Yes, within 24 hours, no questions. After that it is usually already moving.
Why trust a shop you have never heard of? You should not, on our say-so. Check instead that every page tells you what the tool will not do, that each product carries its own delivery number for your country, that we say which figures we measured and which we were told, and that when we get something wrong - the plug, which spindle fits, how long Australia takes - we say what the page used to say.

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Free shipping, US and Australia
Every order ships free, with tracking, to both countries.
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30 days to change your mind
Thirty days from delivery. Unused and in its original packaging.
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A person answers
Write to support@arvonelle.com and you get a real reply, not a form.