{"title":"Drills and bits","description":"\u003cp\u003eCarbide for boards, cobalt for metal. We sell ten of one size rather than an assortment you half use, and every pack says how long it takes to reach you.\u003c\/p\u003e","products":[{"product_id":"micro-drill-bits-20","title":"PCB Micro Drill Bits — 10 of one size","description":"\u003cp\u003e\u003cstrong\u003eTen bits of the size you actually keep breaking.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eEvery assortment set has the same problem: you snap two 0.8 mm bits on a Saturday and the box still has nine sizes you will never touch. So we sell them the other way round — one size, ten bits, and you buy the size you use.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTungsten carbide, 3.175 mm (1\/8 inch) shank.\u003c\/strong\u003e Fits the drill press collet and every rotary tool.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e38 mm long, 10 mm flute.\u003c\/strong\u003e Standard PCB bit geometry.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColoured collar per size\u003c\/strong\u003e so you can grab the right one without a caliper. The colour is whatever the factory used that week - it marks the size, it does not mean anything else.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhich size do you want\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003e0.3 and 0.4 mm\u003c\/strong\u003e - watch screws, the finest vias. These snap if you breathe on them. Run slow.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e0.5 to 0.8 mm\u003c\/strong\u003e - the working range for circuit boards. If you are buying one pack, buy 0.8.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e1.0 and 1.2 mm\u003c\/strong\u003e - component legs, terminal pins, small brass.\u003c\/p\u003e\u003cp\u003eAlso available as a mixed 0.5-1.4 mm set if you genuinely do not know yet.\u003c\/p\u003e\u003ch3\u003eThey break. That is the job.\u003c\/h3\u003e\u003cp\u003eCarbide is hard and brittle. A 0.5 mm bit breaks from speed and from sideways load, not from pressure - so run it slow, let it clear, and do not lever the part. Ten in a pack is not us being generous, it is how many you will get through.\u003c\/p\u003e\u003ch3\u003eIf they arrive broken, that is on us\u003c\/h3\u003e\u003cp\u003eCarbide micro bits sometimes lose a tip in the post - the tube is small and the parcel is not handled gently. Open the pack and count them. If any arrived snapped, tell us the size and we send a replacement pack. Nothing to return and no photograph of a shipping label required.\u003c\/p\u003e\u003ch3\u003eDelivery on this item\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003e6 to 10 business days.\u003c\/strong\u003e These ship from a stocked warehouse, not from the workshop, so they are faster than the machine. We state the real number per item rather than one flattering number for the whole shop.\u003c\/p\u003e","brand":"Mikrabench","offers":[{"title":"0.3 mm","offer_id":46209017118911,"sku":"MB-BIT-03","price":8.99,"currency_code":"USD","in_stock":true},{"title":"0.5 mm","offer_id":46209017151679,"sku":"MB-BIT-05","price":8.99,"currency_code":"USD","in_stock":true},{"title":"0.6 mm","offer_id":46209017184447,"sku":"MB-BIT-06","price":8.99,"currency_code":"USD","in_stock":true},{"title":"0.8 mm","offer_id":46209017217215,"sku":"MB-BIT-08","price":8.99,"currency_code":"USD","in_stock":true},{"title":"1.0 mm","offer_id":46209017249983,"sku":"MB-BIT-10","price":8.99,"currency_code":"USD","in_stock":true},{"title":"1.2 mm","offer_id":46209017282751,"sku":"MB-BIT-12","price":8.99,"currency_code":"USD","in_stock":true},{"title":"Mixed 0.5–1.4 mm","offer_id":46209017315519,"sku":"MB-BIT-MIX","price":10.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0760\/5826\/3743\/files\/Se608eac5f78f487cbfb2c68824fa01eaY.webp?v=1789511614"},{"product_id":"automatic-centre-punch","title":"Automatic Centre Punch","description":"\u003cp\u003e\u003cstrong\u003eA punch that marks the centre without a hammer.\u003c\/strong\u003e Press down until it clicks, and it strikes itself.\u003c\/p\u003e\u003cp\u003eThis is the difference between a hole where you wanted it and a hole 0.4 mm to the left. A drill bit follows the dimple you give it; without one, a small bit skates across brass or a board and takes your workpiece with it.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpring-loaded, one hand.\u003c\/strong\u003e No hammer, which matters when the other hand is holding the part.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable strike force\u003c\/strong\u003e - turn the cap. Light for thin brass and boards, heavier for steel sheet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardened tip.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eUse it lightly on circuit board\u003c\/h3\u003e\u003cp\u003eFibreglass board cracks. Wind the cap right down before you punch a PCB, or skip the punch entirely on boards and let the carbide bit find its own hole at low speed - that works too.\u003c\/p\u003e\u003cp\u003eIt is included in the PCB Kit.\u003c\/p\u003e\u003ch3\u003eDelivery on this item\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003e6 to 10 business days.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Mikrabench","offers":[{"title":"Default Title","offer_id":46207864930495,"sku":"MB-PUNCH","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0760\/5826\/3743\/files\/Sa12536fe7d6548a0b762024bdb0b099fw.webp?v=1789511615"},{"product_id":"spare-drive-belt","title":"Spare Drive Belt","description":"\u003cp\u003e\u003cstrong\u003eThe small white round belt that drives the spindle.\u003c\/strong\u003e It is the part most likely to go first, and it is a five-second job with no tools.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits the Mikrabench press.\u003c\/strong\u003e Round section, transparent rubber, sits in the groove of the stepped pulleys.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo tools.\u003c\/strong\u003e Lift the old one off both pulleys, roll the new one on, done.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorth keeping one in the drawer\u003c\/strong\u003e - a broken belt stops the machine completely and there is no workaround.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eBefore you buy this, read the next line\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eFor twelve months from your order, a belt is free.\u003c\/strong\u003e If yours goes and the machine is inside its first year, tell us and we post one - you do not pay for it and you do not pay postage.\u003c\/p\u003e\u003cp\u003eSo this page is for two people: someone past twelve months, and someone who would simply rather have a spare on the shelf than wait for the post. If you are neither, close the tab and email us instead. We would rather say that here than sell you something you already own.\u003c\/p\u003e\u003cp\u003eIt is also in the PCB Kit. If you bought that kit, there is one in the box.\u003c\/p\u003e\u003ch3\u003eDelivery on this item\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003e2 to 3 weeks.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Mikrabench","offers":[{"title":"Default Title","offer_id":46207864963263,"sku":"MB-BELT-1","price":9.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0760\/5826\/3743\/files\/S1cb6a88cc8384668aed34da03e14cf78H.webp?v=1789511381"},{"product_id":"cobalt-drill-set-03-3","title":"Cobalt Drill Set, 0.5 to 3 mm — 10 pieces","description":"\u003cp\u003e\u003cstrong\u003eTen cobalt bits that stop exactly where the machine stops.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eMost kits at this price ship a 19-piece set running 1 to 10 mm. It reads generously right up until you notice that this chuck closes at 4 mm and the motor is 30 watts, so two thirds of those bits would never turn in this machine. You would be paying for a nice box.\u003c\/p\u003e\u003cp\u003eThis set is 0.5 to 3 mm because that is the working range of the press you are putting them in.\u003c\/p\u003e\u003ch3\u003eWhat is actually in the pack\u003c\/h3\u003e\u003cp\u003eTen bits in five sizes, two of each: \u003cstrong\u003e0.5, 1, 2, 2.5 and 3 mm.\u003c\/strong\u003e We say five sizes rather than ten because a spare of each is the useful thing at this scale - fine bits break, and the one you break is always the one you needed.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-speed steel with 5 percent cobalt (M35).\u003c\/strong\u003e Cobalt is what you use when plain HSS goes blunt on the second hole - harder metals, stainless, anything that work-hardens. It is not M42, which is the next grade up and costs several times this.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStraight shank.\u003c\/strong\u003e Fits the 0.3 to 4 mm chuck directly, no adapter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e135 degree split point\u003c\/strong\u003e so they start where you put them instead of wandering.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eIf you need below 0.5 mm\u003c\/h3\u003e\u003cp\u003eBuy the carbide PCB bits instead. This set starts at 0.5 mm and we are not going to pretend otherwise - the very fine sizes are a different material and a different job.\u003c\/p\u003e\u003ch3\u003eCobalt versus the carbide PCB bits\u003c\/h3\u003e\u003cp\u003eDifferent jobs. The carbide micro bits are for circuit board holes - very fine, very brittle, very fast. These are for metal: slower, tougher, and they bend before they snap.\u003c\/p\u003e\u003cp\u003eIf you are drilling boards, buy the carbide. If you are drilling brass, aluminium, steel sheet or a watch plate, buy these.\u003c\/p\u003e\u003ch3\u003eWhere they stop\u003c\/h3\u003e\u003cp\u003eThe bits will cut harder material than the machine can push them through. On a 30 W press the honest limit in metal is nearer 2 mm than 3, whatever the bit is made of. Cobalt buys you edge life, not torque.\u003c\/p\u003e\u003ch3\u003eAbout the photographs\u003c\/h3\u003e\u003cp\u003eThese are the manufacturer's. Ours are not taken yet, and we would rather say so than let you assume otherwise.\u003c\/p\u003e\u003ch3\u003eDelivery on this item\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003e6 to 10 business days.\u003c\/strong\u003e These ship from stock, so they are faster than the machine.\u003c\/p\u003e","brand":"Mikrabench","offers":[{"title":"Default Title","offer_id":46207865028799,"sku":"MB-BIT-CO10","price":16.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0760\/5826\/3743\/files\/Sd4041dd0bf57483a9dd3a6ab84fccc25m.webp?v=1789521692"},{"product_id":"power-supply-3-12v","title":"Adjustable Power Supply, 3–12 V","description":"\u003cp\u003e\u003cstrong\u003eFirst, the thing most shops would not tell you: the drill press already comes with one of these.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eEvery Mikrabench press ships with a speed-control adapter in the box - 12 V, 5 A, US plug, dial on the front. You do not need this one to use the machine, and we are not going to sell it to you as though you did.\u003c\/p\u003e\u003ch3\u003eSo who is it for\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eYou run a second small DC tool\u003c\/strong\u003e - an engraver, a mini grinder, a flex shaft - and you are tired of unplugging one to power the other.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYours failed and you want a spare on the shelf.\u003c\/strong\u003e If it failed within 12 months of buying the press, do not buy this - email us and we post you one free.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYou want one at the other end of the bench\u003c\/strong\u003e so the cable does not cross your work.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat it is\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3 to 12 V, adjustable.\u003c\/strong\u003e Slow for 0.3 mm, faster for 2 mm and plastic.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUS plug, 100-240 V input.\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTips included.\u003c\/strong\u003e Fits the press and most small DC tools.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIt will not drive anything above 12 V or a heavy motor. This is for small DC tools.\u003c\/p\u003e","brand":"Mikrabench","offers":[{"title":"Default Title","offer_id":46207865061567,"sku":"MB-PSU-312","price":19.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0760\/5826\/3743\/files\/H5244c33f028446e6903e20f66d59f572y.webp?v=1789522306"}],"url":"https:\/\/arvonelle.com\/collections\/drills-and-bits.oembed","provider":"ARVONELLE","version":"1.0","type":"link"}