{"id":2617,"date":"2026-09-15T08:06:13","date_gmt":"2026-09-15T08:06:13","guid":{"rendered":"https:\/\/gushidiamondtools.com\/?post_type=product&p=2617"},"modified":"2026-09-15T08:06:13","modified_gmt":"2026-09-15T08:06:13","slug":"hard-ceramic-drill-bits","status":"publish","type":"product","link":"https:\/\/gushidiamondtools.com\/es\/product\/hard-ceramic-drill-bits\/","title":{"rendered":"Brocas de cer\u00e1mica dura"},"content":{"rendered":"
\n

Product Overview<\/h2>\n

GUSHI HDBG Hard Ceramic Drill Bits are tungsten carbide tipped spear-point bits built for the materials that defeat ordinary twist drills \u2014 hard ceramic tile, soft tile, hard stone, roof tiles and glass. The carbide tip is welded to a 45# steel body and shaped into a self-centring spear point that starts holes accurately without slipping. Offered in 3\u201312mm diameters with a 1\/4″ (6.35mm) hex shank for quick-change rotary drills, a single bit typically delivers around 42 holes in standard ceramic. Manufactured by Huzhou Gu’s Imp. & Exp. Co., Ltd. (founded 2004, ISO 9001 and MPA certified) with an OEM MOQ of 200 pieces.<\/p>\n

The defining advantage is the carbide tip. Ceramic, porcelain, glass and stone are abrasive and brittle \u2014 a standard HSS twist bit either skates across the surface or overheats and dulls within a hole or two. The HDBG’s tungsten-carbide spear point bites in immediately, cuts cleanly through the glaze, and holds an edge long enough to punch dozens of holes. The specially designed centring tip means you do not need a punch or pilot hole to keep the bit on mark.<\/p>\n

The 1\/4 inch hex shank is a practical, job-site feature: it locks into quick-change chucks and impact drivers in rotary mode, transmits maximum torque without rounding out, and will not spin loose mid-hole the way a round shank can. For distributors serving the tile, bathroom, kitchen and roofing trades, the HDBG is a high-turnover, low-cost SKU with a clear value story \u2014 clean holes, no cracked tiles, and a bit that outlasts a dozen cheap twist drills on ceramic.<\/p>\n

GUSHI supports the line with OEM branding, custom packaging (PVC pouch, blister card or skin card), colour coating (TiN \/ sandblasting \/ nickel) and mixed-size sets. The same manufacturing platform also produces diamond core drill bits for high-volume stone work \u2014 see the\u00a0related drilling tools<\/a>\u00a0for the wider range.<\/p>\n<\/div>\n

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Full Specifications<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/th>\nSpecification<\/th>\n<\/tr>\n
Product Type<\/td>\nTungsten carbide tipped spear-point drill bit for brittle materials<\/td>\n<\/tr>\n
Series \/ Model<\/td>\nHDBG series \u2014 3HDBG to 12HDBG (8 diameters)<\/td>\n<\/tr>\n
Available Diameters<\/td>\n3, 4, 5, 6, 7, 8, 10, 12mm (1\/8″ \u2013 15\/32″)<\/td>\n<\/tr>\n
Tip Material<\/td>\nTungsten carbide (YG6X grade), welded to body<\/td>\n<\/tr>\n
Body Material<\/td>\n45# high-carbon steel, fully heat-treated<\/td>\n<\/tr>\n
Tip Style<\/td>\nSpear point with specially designed centring tip<\/td>\n<\/tr>\n
Shank Type<\/td>\n1\/4″ (6.35mm) hex shank \u2014 quick-change compatible<\/td>\n<\/tr>\n
Overall Length<\/td>\n60mm (3\u20134mm) to 100mm (10\u201312mm)<\/td>\n<\/tr>\n
Process<\/td>\nCarbide tip welded to steel body<\/td>\n<\/tr>\n
Typical Life<\/td>\n~42 holes per bit in standard ceramic tile (varies by material & cooling)<\/td>\n<\/tr>\n
Drilling Mode<\/td>\nRotary only \u2014 NOT for hammer \/ impact mode<\/td>\n<\/tr>\n
Cooling<\/td>\nWater cooling recommended; dry possible on rotary (shorter life)<\/td>\n<\/tr>\n
Suitable Machines<\/td>\nLithium-ion (cordless) drill, hand drill, bench drill press (rotary)<\/td>\n<\/tr>\n
Suitable Materials<\/td>\nHard tile, soft tile, hard stone, roof tiles, glass (non-tempered)<\/td>\n<\/tr>\n
Surface Finish<\/td>\nOptional TiN \/ sandblasting \/ nickel \/ black coating<\/td>\n<\/tr>\n
Standards & Certifications<\/td>\nISO 9001, MPA; SGS inspection available<\/td>\n<\/tr>\n
Packaging<\/td>\nPVC pouch, PVC blister card, skin card or bulk carton<\/td>\n<\/tr>\n
OEM MOQ<\/td>\n200 pieces per size (mixed sizes negotiable)<\/td>\n<\/tr>\n
Sample Policy<\/td>\nAvailable at cost price + shipping<\/td>\n<\/tr>\n
Payment Terms<\/td>\nL\/C, T\/T, Western Union, PayPal<\/td>\n<\/tr>\n
Port of Loading<\/td>\nShanghai or Ningbo, China<\/td>\n<\/tr>\n
Lead Time<\/td>\n20\u201330 days after deposit<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n

How the Ceramic Drill Bit Works<\/h2>\n

1. Carbide Spear Tip Bites In and Cuts Clean Through Glaze<\/h3>\n

The tungsten-carbide (YG6X) tip is far harder than the steel or ceramic it meets, so it scores and penetrates the glazed surface instead of skating across it. The spear profile concentrates force at the point, letting the bit enter hard tile on the first revolution. Because the tip is welded and heat-treated, it keeps a sharp cutting edge through dozens of holes rather than dulling like an HSS bit.<\/p>\n

2. Centring Tip Stops Wandering and Cracking<\/h3>\n

A specially designed centring tip holds the bit on the marked spot at start-up, removing the need for a punch or pilot and preventing the bit from walking across the slick tile face. Accurate entry is what keeps the surrounding glaze from chipping \u2014 especially important on visible bathroom and kitchen work.<\/p>\n

3. Hex Shank Delivers Maximum Torque Without Slipping<\/h3>\n

The 1\/4 inch (6.35mm) hex shank locks into quick-change chucks and impact drivers in rotary mode, transmitting full torque with no round-out. It will not spin loose under load the way a round shank can, so the bit stays engaged and cuts straight \u2014 a small but decisive job-site advantage on a cordless drill.<\/p>\n<\/div>\n

\n

Key Features Explained<\/h2>\n

Carbide Technology Tip \u2014 Especially Durable<\/h3>\n

The carbide tip is the reason these bits outlast ordinary drill bits on tile and stone. Tungsten carbide resists the abrasion of ceramic and glass far better than high-speed steel, so a single HDBG bit makes around 42 holes in standard ceramic instead of the one or two a twist bit manages before it dulls and smokes.<\/p>\n

Centring Tip \u2014 Accurate Start, No Cracks<\/h3>\n

The self-centring design means the bit bites exactly where you mark it. That accuracy is what prevents the edge chipping that ruins a visible tile. For best results still lay a strip of masking tape over the mark \u2014 it gives the tip extra bite on the first turn and removes cleanly afterward.<\/p>\n

Hex Shank \u2014 Strong Connection, Maximum Torque<\/h3>\n

The hex shank grips harder and transmits more torque than a round shank of the same diameter, and it is quick-change compatible for fast bit swaps on a cordless drill. For distributors, it is also a clear differentiator from generic round-shank tile bits on the shelf.<\/p>\n

Water Cooling Extends Life and Protects the Work<\/h3>\n

Drilling tile and glass generates heat that cracks the workpiece and cooks the carbide. A light, continuous water spray (or a wet sponge held at the point) keeps both cool: the hole stays clean, and the bit’s life roughly doubles. Dry drilling on a rotary drill is fine for a few holes but wears the tip quickly.<\/p>\n<\/div>\n

\n

Size Selection Guide (HDBG Series)<\/h2>\n

Choose the diameter by the anchor, screw or pipe you are fixing, and the material thickness. Lengths run from 60mm on the small sizes to 100mm on the 10\u201312mm bits.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n
Item No.<\/th>\nDiameter (mm \/ inch)<\/th>\nOverall Length (mm)<\/th>\nTypical Use<\/th>\n<\/tr>\n
3HDBG<\/td>\n3mm \/ 1\/8″<\/td>\n60<\/td>\nPilot holes, mirrors, thin glass, small anchors<\/td>\n<\/tr>\n
4HDBG<\/td>\n4mm \/ 5\/32″<\/td>\n60<\/td>\nSmall fixtures, light anchors<\/td>\n<\/tr>\n
5HDBG<\/td>\n5mm \/ 3\/16″<\/td>\n70<\/td>\nEveryday tile anchors and screws<\/td>\n<\/tr>\n
6HDBG<\/td>\n6mm \/ 15\/64″<\/td>\n75<\/td>\nStandard wall-plug holes, towel bars<\/td>\n<\/tr>\n
7HDBG<\/td>\n7mm \/ 9\/32″<\/td>\n80<\/td>\nLarger anchors, European plug sizes<\/td>\n<\/tr>\n
8HDBG<\/td>\n8mm \/ 5\/16″<\/td>\n80<\/td>\nHeavy fixtures, railings, grab bars<\/td>\n<\/tr>\n
10HDBG<\/td>\n10mm \/ 25\/64″<\/td>\n100<\/td>\nBig anchors, pipe\/through-holes<\/td>\n<\/tr>\n
12HDBG<\/td>\n12mm \/ 15\/32″<\/td>\n100<\/td>\nLargest anchors, conduit, ventilation<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
Pro Tip:<\/strong>\u00a0The 5\u20136mm sizes are the everyday choice for tile fixtures. Always match the bit to a sharp drill point with a fresh tip \u2014 if a bit starts to wander or smoke, it is worn; replace it rather than forcing it, which is what cracks tiles.<\/div>\n<\/div>\n
\n

Applications & Suitable Materials<\/h2>\n

Typical Applications<\/h3>\n\n\n\n\n\n\n\n\n\n
Application<\/th>\nRecommended Sizes<\/th>\nNotes<\/th>\n<\/tr>\n
Bathroom \/ kitchen tile drilling<\/td>\n5\u20138mm HDBG<\/td>\nCentring tip prevents edge chipping<\/td>\n<\/tr>\n
Mirror & glass mounting<\/td>\n3\u20136mm HDBG<\/td>\nUse low speed + water; non-tempered glass only<\/td>\n<\/tr>\n
Roof tile penetrations<\/td>\n6\u201310mm HDBG<\/td>\nHard stone \/ roof tile rated<\/td>\n<\/tr>\n
Granite & marble fixtures<\/td>\n6\u201310mm HDBG<\/td>\nWater cooling strongly recommended<\/td>\n<\/tr>\n
Hard & soft ceramic tile<\/td>\n3\u201312mm HDBG<\/td>\nHDBG specialist material range<\/td>\n<\/tr>\n
Electrical \/ plumbing through-holes<\/td>\n10\u201312mm HDBG<\/td>\nLargest diameters in range<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Suitable Materials<\/h3>\n\n\n\n\n\n\n\n\n\n\n
Material<\/th>\nDrilling Performance<\/th>\nNotes<\/th>\n<\/tr>\n
Hard ceramic tile<\/td>\nExcellent \u2014 HDBG specialist<\/td>\nWater cooling, low speed<\/td>\n<\/tr>\n
Soft tile<\/td>\nExcellent<\/td>\nFast, clean holes<\/td>\n<\/tr>\n
Hard stone<\/td>\nGood<\/td>\nWater cooling recommended<\/td>\n<\/tr>\n
Roof tiles<\/td>\nExcellent<\/td>\nHard-stone rated tip<\/td>\n<\/tr>\n
Glass (annealed \/ mirror)<\/td>\nGood<\/td>\nLow speed + water; NOT tempered glass<\/td>\n<\/tr>\n
Granite \/ marble<\/td>\nGood<\/td>\nWater cooling, patience<\/td>\n<\/tr>\n
Metal, wood<\/td>\nNot recommended<\/td>\nUse a dedicated metal or wood bit<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\u26a0\ufe0f Do not drill toughened (tempered) glass:<\/strong>\u00a0tempered glass shatters rather than drills \u2014 no standard drill bit makes a clean hole in it. Always confirm the glass is annealed (ordinary) before drilling, and never run a drill in hammer mode on any brittle material.<\/div>\n<\/div>\n
\n

HDBG vs. Standard Twist Drill \/ Diamond Core Bit<\/h2>\n

For brittle materials, the right bit depends on volume and hole type. Here is how the HDBG carbide bit compares with the two common alternatives:<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
Dimension<\/th>\nGUSHI HDBG Carbide Ceramic Bit<\/th>\nStandard HSS Twist Drill<\/th>\nDiamond Core Bit<\/th>\n<\/tr>\n
Best for<\/td>\nTile, glass, stone \u2014 occasional to moderate use<\/td>\nMetal, wood (not brittle tile)<\/td>\nHigh-volume \/ large holes in stone<\/td>\n<\/tr>\n
Starts on glazed tile<\/td>\nYes \u2014 centring spear tip, no slip<\/td>\nNo \u2014 skates & wanders<\/td>\nYes \u2014 needs pilot or guide<\/td>\n<\/tr>\n
Holes per bit (ceramic)<\/td>\n~42 holes<\/td>\n1\u20132 holes then dull<\/td>\nHundreds of holes<\/td>\n<\/tr>\n
Shank<\/td>\n1\/4″ hex, quick-change<\/td>\nRound, can slip<\/td>\nRound \/ SDS, needs core drill<\/td>\n<\/tr>\n
Hole type<\/td>\nSolid drill-through<\/td>\nSolid drill-through<\/td>\nCoring (annular)<\/td>\n<\/tr>\n
Cost per bit<\/td>\nLow (US$0.20\u20131.50)<\/td>\nLow<\/td>\nHigh<\/td>\n<\/tr>\n
Cooling need<\/td>\nWater recommended<\/td>\nVaries<\/td>\nWater required<\/td>\n<\/tr>\n
Machine<\/td>\nAny rotary drill<\/td>\nAny drill<\/td>\nCore drill \/ Angle grinder<\/td>\n<\/tr>\n
Best for distributor SKU<\/td>\nHigh-turnover, low-cost tile bit<\/td>\nGeneral hardware<\/td>\nProfessional stone work<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Bottom line:<\/strong>\u00a0For the vast majority of tile-mounting, bathroom, kitchen and roofing jobs, the carbide HDBG bit is the practical, economical pick \u2014 it starts cleanly, lasts dozens of holes, and fits the cordless drill already on the truck. Reach for a diamond core bit only when volume or diameter demands it.<\/p>\n<\/div>\n

\n

How to Use: Step-by-Step Drilling Guide<\/h2>\n
    \n
  1. Confirm the material \u2014 annealed glass, ceramic or stone only. Never drill tempered glass, metal or wood with this bit.<\/li>\n
  2. Set the drill to\u00a0non-hammer \/ rotary mode<\/strong>. Hammer action will shatter the workpiece and destroy the carbide tip.<\/li>\n
  3. Mark the spot and lay a strip of masking tape over it to stop the bit walking on the first turn.<\/li>\n
  4. Fit the 1\/4″ hex shank into a quick-change chuck or standard drill chuck and seat it fully.<\/li>\n
  5. Start at the\u00a0lowest speed<\/strong>\u00a0with very light pressure; let the centring tip bite and establish the hole.<\/li>\n
  6. Apply a continuous\u00a0water spray or a wet sponge<\/strong>\u00a0at the drill point to keep tip and tile cool.<\/li>\n
  7. Increase speed only once the hole is established; keep pressure light and steady \u2014 never force it.<\/li>\n
  8. Back the bit out periodically to clear slurry and let it cool, especially on deep or large holes.<\/li>\n
  9. For glass, support the back face and drill from the front; break through slowly to avoid chipping the exit.<\/li>\n
  10. Stop if the bit smokes, wanders, or the tip goes dull \u2014 replace it; forcing a worn bit cracks tiles.<\/li>\n
  11. After drilling, clean the bit and store it dry to prevent rust on the steel body.<\/li>\n
  12. Replace the bit once it no longer centres or cuts cleanly; a fresh tip is cheaper than a ruined tile.<\/li>\n<\/ol>\n
    Safety:<\/strong>\u00a0Always wear eye protection \u2014 carbide and glaze fragments fly. Use water near power tools with a GFCI or battery tool, keep hands clear of the spinning bit, and never engage hammer mode. Replace the bit if the carbide tip is chipped or loose.<\/div>\n

    For more guidance, see our related tools:\u00a0diamond cutting wheels<\/a>,\u00a0turbo saw blades<\/a>, and\u00a0the full diamond tool range<\/a>.<\/p>\n<\/div>\n

    \n

    Preguntas frecuentes<\/h2>\n
    \n

    What are hard ceramic drill bits used for?<\/h3>\n

    GUSHI HDBG hard ceramic drill bits are for drilling brittle, hard materials: hard ceramic tile, soft tile, hard stone, roof tiles and glass (ordinary, non-tempered). They are the standard choice for bathroom and kitchen tile work, mirror mounting, granite and marble fixtures, and roof-tile penetrations. They are not for metal or wood \u2014 use a dedicated metal or wood bit for those.<\/p>\n<\/div>\n

    \n

    Can these drill bits drill glass and toughened (tempered) glass?<\/h3>\n

    Yes for ordinary glass and mirrors \u2014 the spear-point carbide tip cuts clean holes without cracking when used at low speed with water cooling. However, do NOT use them on toughened (tempered) glass: tempered glass shatters rather than drills, and no standard drill bit will make a clean hole in it. Always confirm the glass is annealed before drilling.<\/p>\n<\/div>\n

    \n

    What drill should I use \u2014 can I use a hammer drill?<\/h3>\n

    Use a standard rotary drill or a lithium-ion (cordless) hand drill set to NON-hammer \/ drill mode. The 1\/4 inch (6.35mm) hex shank fits quick-change chucks and impact drivers in rotary mode. Never engage hammer action \u2014 the percussion will shatter ceramic and glass and destroy the carbide tip. A bench drill press also works well for repeat holes.<\/p>\n<\/div>\n

    \n

    How many holes can one hard ceramic drill bit make?<\/h3>\n

    A single HDBG bit typically drills around 42 holes in standard ceramic tile under normal conditions. Real life varies with material hardness, hole diameter and cooling: harder porcelain and larger diameters shorten life, while water cooling and low speed extend it. For very hard porcelain or high-volume work, consider a diamond core bit instead.<\/p>\n<\/div>\n

    \n

    Do I need water cooling when drilling tile or glass?<\/h3>\n

    Water cooling is strongly recommended. It keeps the carbide tip cool, prevents the surrounding tile or glass from cracking, and roughly doubles the number of holes per bit. A light, continuous water spray or a wet sponge at the drill point is enough. Dry drilling with a rotary drill is possible for a few holes but wears the tip far faster and risks heat cracks.<\/p>\n<\/div>\n

    \n

    How do I start a hole without the bit slipping or cracking the tile?<\/h3>\n

    The HDBG bit has a specially designed centring tip that bites in accurately, but for best results: mark the spot, lay a strip of masking tape over it to stop wandering, start at the very lowest speed with light pressure, and let the bit cut at its own pace. Increase speed only once the hole is established. Never push hard \u2014 pressure causes chipping and tip damage.<\/p>\n<\/div>\n

    \n

    What sizes of GUSHI HDBG ceramic drill bits are available?<\/h3>\n

    The HDBG hard ceramic drill bit range covers 3, 4, 5, 6, 7, 8, 10 and 12mm diameters (about 1\/8 inch up to 15\/32 inch). Lengths run from 60mm on the small sizes to 100mm on the 10 and 12mm bits. Pick the diameter to match your anchor, screw or pipe; the 5-6mm sizes are the everyday choice for tile fixtures.<\/p>\n<\/div>\n

    \n

    Carbide ceramic drill bit or diamond core bit \u2014 which should I choose?<\/h3>\n

    Choose a carbide-tipped HDBG bit for occasional tile, glass and stone holes, DIY jobs, and where a solid (non-coring) hole is fine \u2014 it is cheap, fast to start and fits any rotary drill. Choose a diamond core bit when you need many clean holes, larger diameters, or are working very hard porcelain day after day \u2014 diamond cores last far longer per hole but cost more and need a core drill. For most tile-mounting tasks the carbide bit is the practical pick.<\/p>\n<\/div>\n<\/div>\n

    \n

    OEM & Wholesale Information<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n
    Parameter<\/th>\nDetail<\/th>\n<\/tr>\n
    MOQ (drill bits)<\/td>\n200 pieces per size<\/td>\n<\/tr>\n
    Sample policy<\/td>\nAvailable at cost price + buyer pays shipping<\/td>\n<\/tr>\n
    Customization<\/td>\nLogo (printed \/ laser-etched), colour coating (TiN \/ nickel \/ black), packaging, shank type, mixed-size sets<\/td>\n<\/tr>\n
    Private label<\/td>\nYes \u2014 GUSHI also builds bits for distributor brands<\/td>\n<\/tr>\n
    Packaging options<\/td>\nPVC pouch, PVC blister card, skin card, bulk carton<\/td>\n<\/tr>\n
    Payment terms<\/td>\nL\/C, T\/T, Western Union, PayPal<\/td>\n<\/tr>\n
    Port of loading<\/td>\nShanghai or Ningbo, China<\/td>\n<\/tr>\n
    Production capacity<\/td>\n1,000,000 pcs \/ day<\/td>\n<\/tr>\n
    Languages<\/td>\nEnglish, Spanish, Japanese, Russian, French, German<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Huzhou Gu’s Imp. & Exp. Co., Ltd. has manufactured and exported diamond and carbide tools since 2004. The company is one of 23 Chinese manufacturers that won the U.S. anti-dumping case for diamond blades (exporting under a competitive 6.2% duty), and counts distributors in the USA, Canada, Germany, UK, Netherlands, Italy, Portugal, Poland, Czech Republic, Brazil, Chile, Australia and South Africa among its customers \u2014 many for more than 10 years. Every 10 pieces of Chinese diamond blades exported to Brazil, 2 come from GUSHI.<\/p>\n

    Explore the complete range:\u00a0Diamond Saw Blades<\/a>,\u00a0Turbo Saw Blades<\/a>, and\u00a0Dry Cutting Diamond Blades<\/a>.<\/p>\n

    WhatsApp: +86 133 2582 1813<\/a><\/strong><\/div>","protected":false},"excerpt":{"rendered":"

    Product Overview GUSHI HDBG Hard Ceramic Drill Bits are tungsten carbide tipped spear-point bits built for the materials that defeat ordinary twist drills \u2014 hard ceramic tile, soft tile, hard stone, roof tiles and glass. The carbide tip is welded to a 45# steel body and shaped into a self-centring spear point that starts holes 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