Sds Drill Bits Selection Guide | Hebei Wotu Fastener Manufacturing Co., Ltd.
SDS drill bits are chosen for drilling concrete, brick, block and stone with a rotary hammer. The first decision is not just diameter; it is the shank system, base material and hole requirement, because the wrong bit can slow drilling, damage the hole or fail to fit the tool.
For a purchase inquiry, the useful details are the SDS type, drilling diameter, working length, material being drilled and whether the holes are for anchors, through-fixing or general installation work.
Brand: Hengzuan Surface: blue and white zinc plated, optional color zinc plated, black oxide treatment Specifications: in stock ST3.5/ST4.2/ST4.8 mainstream specifications, rod length 16~50mm full size range, supports nonstandard length customization, suitable for drilling steel sheets 2~5mm Packaging: 25kg cartons, full pallets packed on wooden pallets, support neutral packaging, private-label customization
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Brand: Hengzuan Surface: blue and white zinc plated, can be customized color zinc plated, black oxide plated Specifications: Comply with GB/T15856.2-2002 Chinese national standard, in stock ST4.2/ST4.8/ST5.5 full range of specifications, length 13mm~75mm optional, supports customized nonstandard rod lengths; drilling adaptation plate thickness 0.7~6mm Packaging: 25kg export cartons, full pallets wrapped with film, supports neutral export packaging, customer private-label customization
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Brand: Hengzuan Surface: screw color zinc plated, head color nylon protective cap, multiple colors available Specifications: Chinese national standard ST5.5, ST6.3 mainstream caliber, rod length 25mm~125mm full range of specifications in stock, supports nonstandard length customization, suitable for drilling steel sheet thickness 2~6mm Packaging: 25kg cartons, full pallets packed on wooden pallets, support neutral packaging, private-label customization
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Brand: Hengzuan Surface: Color zinc plated, optional blue-white zinc plated, black oxide treatment Specifications: Chinese national standard ST4.2/ST4.8/ST5.5 specifications, rod length 13~50mm in stock, supports nonstandard length customization Packaging: 25kg export cartons, full wooden pallets wrapped with film, supports neutral packaging, private-label customization
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Brand: Hengzuan Surface: blue and white zinc plated, can be customized color zinc plated, black oxide plated Specifications: in stock 3.5/3.9/4.2/4.8/5.5 mainstream wire diameter, rod length 13mm~75mm full size range, nonstandard length can be customized as needed Packaging: 25kg export cartons, full wooden pallets wrapped with film, supports neutral export packaging, private-label customization
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Brand: Hengzuan Surface: color zinc plated, customized blue-white zinc plated, black oxide Specifications: in stock 3.9/4.2/4.8/5.5 full diameter, length 13mm~75mm full size range, supports customized nonstandard rod lengths Packaging: 25kg export cartons, full pallets wrapped with film, supports neutral export packaging, customer private-label customization
Read MoreSelection Criteria
Selection should focus on shank type, drilling diameter, usable length, carbide head style, flute design and the material being drilled. Packaging, labeling and order quantity may also matter for distributors or project supply, but the drilling application should come first.
| Criterion | What To Check | Why It Matters | Buyer Tip |
|---|---|---|---|
| SDS shank type for the drill | Confirm whether the tool uses SDS-plus, SDS-max, or another SDS fitting before selecting the bit. | The shank must lock correctly in the chuck. A mismatched shank will not fit or will transfer impact energy poorly. | Which rotary hammer model will the bits be used with, and what SDS shank does its chuck accept? |
| Material being drilled | Match the bit design to concrete, brick, block, stone, or masonry with embedded reinforcement. | Hard aggregate, hollow block, and rebar contact place different demands on the carbide tip and flute design. | What base material will be drilled most often, and is occasional contact with rebar expected? |
| Hole diameter and usable drilling depth | Specify the required hole size and the depth needed for the anchor, fixing, or through-hole. | Diameter affects anchor fit, while usable length affects whether the bit can reach depth without over-drilling or clogging. | What anchor or fastener size is the hole for, and what finished hole depth is required? |
| Tip geometry and carbide construction | Ask whether the bit has a two-cutter or multi-cutter head and how the carbide tip is attached. | Tip design influences centering, drilling speed, durability, and performance in hard concrete or uneven aggregate. | Is the job mainly light masonry drilling, or repeated holes in harder concrete where tip life matters more? |
| Dust removal and flute design | Compare flute shape and length for chip clearance during hammer drilling. | Poor dust removal slows drilling, increases heat, and can make holes less consistent for anchors. | Will the holes be deep or repeated in batches, and is dust extraction or regular hole cleaning part of the process? |
The practical distinction is between SDS-plus and SDS-max. SDS-plus is commonly used with lighter rotary hammers for smaller anchor and installation holes, while SDS-max is used with heavier hammers for larger holes and more demanding concrete work. They are not interchangeable, so the tool chuck type should be confirmed before discussing sizes.
Tip design also matters. A standard carbide-tipped bit can suit general masonry drilling, while multi-cutter or reinforced head designs may be preferred when drilling harder concrete or encountering aggregate. If hole accuracy matters for anchors, confirm the required hole diameter, depth and tolerance expectations rather than choosing only by nominal size.
Start with the rotary hammer connection. Ask whether the job uses SDS-plus or SDS-max, then match the shank to the tool. A common mistake is ordering the right drilling diameter with the wrong shank, which makes the bit unusable on site.
Match the bit to the base material. Brick and block are less demanding than reinforced concrete or dense stone. Harder materials may justify a stronger carbide head and flute design that clears dust efficiently. For anchor holes, poor dust evacuation can affect drilling speed and final hole quality.
Check working length, not only overall length. The bit must drill deep enough for the anchor, sleeve, fixing or through-hole while leaving room for dust removal. Ordering a bit that is just long enough on paper can create problems if the hole needs extra depth for debris or embedment clearance.
For an inquiry to Hebei Wotu Fastener Manufacturing Co., Ltd., provide the SDS type, diameter range, usable length, base material and intended fixing system. If the bits are being paired with screws, anchors or other fasteners, include those details so compatibility can be discussed before quoting.
| Criteria | Importance | Description | Example Options |
|---|---|---|---|
| Shank system | Critical for tool compatibility | The bit must match the rotary hammer chuck. SDS-plus and SDS-max are different systems and cannot be substituted for each other. | A buyer using an SDS-plus rotary hammer should not order SDS-max bits, even if the drilling diameter is correct. |
| Base material | Strong influence on bit design choice | Brick, block, concrete and stone place different demands on the carbide tip and flute. Harder materials usually require a more robust drilling head and good dust removal. | General blockwork may suit a basic carbide-tipped bit, while dense concrete may justify a stronger head design. |
| Hole diameter and depth | Essential for fixing fit and installation quality | Anchor holes and through-fixing holes need the correct diameter and enough usable length. Nominal size alone is not enough if the hole must meet a specific fixing requirement. | For an anchor hole, specify the required diameter and drilling depth rather than only asking for a common size. |
| Tip and flute design | Affects drilling speed, durability and hole cleanliness | The carbide head breaks the material, while the flute clears dust from the hole. Poor dust evacuation can slow work and reduce hole quality, especially in deeper holes. | A deeper concrete hole may need a bit design that clears dust effectively, not just the lowest-cost option. |
| Application type | Helps balance cost against performance | Light-duty masonry fixing, repeated anchor installation and heavy concrete drilling do not all require the same bit. The right choice depends on workload, material hardness and required hole consistency. | Occasional drilling in brick may not need the same specification as repeated anchor holes in concrete. |
Related Options
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Check the chuck type on the rotary hammer first. SDS-plus and SDS-max have different shanks and do not fit the same tool, even if the drilling diameter looks suitable. SDS-plus is usually associated with lighter anchor and masonry work, while SDS-max is used with heavier hammers and larger holes.
They can be, provided the shank, diameter, usable length and tip design match the anchor system and base material. For anchor work, hole diameter and depth matter more than they do for casual masonry drilling, because a loose, shallow or dusty hole can affect fixing performance.
A standard carbide-tipped bit can be a practical choice for general brick, block and ordinary concrete drilling. A multi-cutter or reinforced head design may be more appropriate for harder concrete, aggregate or jobs where cleaner, more consistent holes are important, but it may cost more than a basic bit.
No. Overall length includes the shank and non-working portions of the bit, while usable or working length is the depth the bit can actually drill. Buyers should specify the required hole depth and confirm that the usable length allows room for the fixing and dust clearance.
Include the SDS type, drilling diameter, usable length, base material and intended application, such as anchor installation, through-fixing or general masonry work. If the bits need to match a specific anchor, screw or fixing system, include that detail as well so the required hole size can be checked.
Send the SDS shank type, drilling diameter and usable length you need. Please also include the base material, such as concrete, brick, block or stone, and whether the holes are for anchors, through-fixing or general installation.
