SDS-Plus Drill Bits

Choose by substrate and head architecture. Standard 2-cutter (Ø5-16mm) is for plain concrete, brick, block and masonry anchor holes. ZHPLUS-5X 4-cutter cross (Ø5-25mm) is for hard or reinforced concrete, precise fixings and anchor holes where incidental rebar contact is possible. Full Carbide Head (Ø4-25mm) is the higher-duty option for demanding reinforced-concrete and high-volume anchor programs. Wood, steel plate, tile and glass require their own dedicated cutting tools.

Choose Standard 2-cutter for plain concrete, brick and masonry. Choose ZHPLUS-5X 4-cutter cross for professional reinforced-concrete drilling, concrete fixing and anchor holes where rebar contact may occur: the anti-jamming carbide head and four-flute dust evacuation support stable, precise drilling. Choose Full Carbide Head when bars are hit often: the one-piece head keeps drilling through rebar contact without a tool change. With 2-cutter and 4-cutter bits, switch to a dedicated rebar cutter when the bit meets a bar. Whether a structural bar may be cut at all is decided by the structural engineer.

Hammer settings:
• Mode: use hammer-drilling mode; rotation-only mode in concrete overheats the carbide and wears it rapidly.
• Speed: run at the hammer’s rated speed. On variable-speed tools, start slowly to locate the hole; as a guide, Ø5–10 mm ≈ 900–1200 rpm, Ø12–16 mm ≈ 700–900 rpm, Ø18–25 mm ≈ 500–700 rpm.
• Impact: most SDS-Plus hammers deliver about 4,000–5,000 blows per minute; blow energy is set by the tool, so choose a hammer whose energy class suits the diameter.

Technique:
1. Start square: hold the hammer at 90° to the surface with light pressure until the head is seated.
2. Let the tool work: apply a steady, moderate feed (roughly 5–10 lb / 2–5 kg of hand pressure); extra force slows drilling and overloads the head.
3. Clear dust: on holes deeper than about 100 mm, withdraw the bit every 50 mm or drill with dust extraction; on Ø16 mm+ or deep holes, pause about every 30 seconds to let the head cool.
4. Keep alignment: tilting during drilling gives oval holes and side-loads the head.

If the bit meets reinforcement:
• Full Carbide Head bits: keep a steady feed and drill through; do not force the tool if it binds.
• Brazed 2-cutter and 4-cutter bits: stop advancing, withdraw the bit and switch to a dedicated rebar cutter for that section.
• Cutting structural reinforcement needs the structural engineer’s approval; check the approved hole position first.

Visual inspection:

1. Carbide head:
• Chipped or rounded cutting edges (chips under 1 mm are acceptable; over 2 mm, replace)
• A missing or loosened carbide insert: replace immediately
• Uneven wear on one side (a sign of drilling at an angle)
• Head diameter worn below the hole size the anchor requires

2. Shank:
• Worn or damaged SDS grooves
• Excessive play in the chuck when locked
• Deep scoring on the shank

3. Flutes:
• Packed spirals that will not clean out
• Bent or deformed flutes

In use:
• Drilling noticeably slower than a new bit
• Dark, burnt-looking dust
• Heavy vibration or chatter
• The tool bogs down or binds frequently
• Rough, oversized or out-of-round holes

When to replace: as soon as the head no longer drills the hole diameter the anchor approval specifies, or any sign above appears. Typical service life: brazed 2-cutter and 4-cutter bits about 80–150 holes, Full Carbide Head bits 400–600+ holes (Ø10 × 100 mm in C30 concrete); the one-piece head holds its edge far longer where rebar contact is frequent. For OEM programs we agree hole-count targets on the buyer’s concrete during sample approval.

Proper Maintenance Routine:

After Each Use:
1. Dust Removal: Use compressed air or stiff brush to clear concrete dust from flutes and SDS grooves. Dust left in grooves causes premature shank wear.
2. Wipe Down: Clean with dry cloth. For wet drilling, wipe thoroughly to prevent rust.
3. Inspect: Quick visual check for carbide chips or damage.

Weekly (for professionals):
1. Deep Clean: Soak in degreaser for 10 minutes, scrub flutes with wire brush
2. Lubricate Shank: Apply light machine oil or anti-seize compound to SDS grooves (NOT the carbide tip)
3. Check Chuck: Clean the rotary hammer's SDS chuck; blow out dust from groove slots

Storage Best Practices:

1. Organization:
• Use indexed bit case or wall-mounted holder (prevents bits from rolling/falling)
• Store vertically with carbide tip up (prevents tip damage)
• Separate by size for quick access

2. Environment:
• Dry location with <60% humidity
• Avoid temperature extremes (concrete dust absorbs moisture)
• Keep away from corrosive chemicals

3. Protection:
• Use rubber tip protectors for carbide heads (especially during transport)
• Never throw loose bits in toolbox (causes chipping)
• For long-term storage (3+ months), coat shank with rust preventive

What NOT to Do:
✗ Leave bit mounted in hammer overnight (wears chuck)
✗ Store wet bits (causes rust on shank)
✗ Stack bits on top of each other (damages carbide)
✗ Use WD-40 as lubricant (attracts dust)

Proper care can extend bit life by 50–70% and keeps drilling performance consistent.

Our manufacturing standards:

ISO 9001:2015 quality system:
• Certified quality management system covering design, production, inspection and delivery
• Annual surveillance audits by an accredited certification body

Product fit and inspection:
• SDS-Plus shank fit checked with go/no-go gauges
• Head geometry, carbide centering, circular run-out and groove dimensions verified by batch inspection
• DIN 8039 / ISO 5468 are straight-shank masonry-bit standards, not SDS-Plus shank standards

Compliance documentation:
• CE documentation for applicable markets
• CE is a market-access declaration, not a drilling-performance or anchor-hole certification

Materials:
• Carbide: YG8C (8% cobalt) for the 2-cutter and ZHPLUS-5X lines; YG8C for the Full Carbide Head line
• Steel body: 40Cr chromium alloy steel, heat-treated to HRC 48–52
• Brazing: continuous controlled-atmosphere mesh-belt furnace brazing

Testing:
• Every production batch: carbide hardness (HRA) checked against the grade specification
• Joint quality: metallographic cross-section of the brazed joint
• Witness drilling in concrete during sample approval

Documentation available:
• Material certificates on request
• CE Declaration of Conformity
• ISO 9001 certificate

This keeps the claim focused on manufacturing control, shank fit and batch inspection instead of misusing straight-shank masonry-bit standards.

Small-diameter SDS-Plus: approximately 1,000 pcs per size. We confirm the final MOQ for the selected diameter, length, head construction and packaging. Production orders have a minimum total value of US$5,000. Send your size-and-quantity list; we confirm marking, custom specifications, packaging and delivery in the quotation. Lead time, paid evaluation samples and payment terms are confirmed in the quotation for the selected specification mix and destination.

Yes. Drilling dust left in the bore is the single biggest cause of low adhesive-anchor bond strength, because the resin grips the dust layer instead of the concrete wall and pull-out falls well below the design value. Clean the bore before injecting: blow it out, brush the wall, then blow again, or drill with a dust-extraction system. Either the 2-cutter or the full-carbide-head line gives you a round, on-gauge hole, but hole cleaning is what preserves the anchor's rated load.

Send one line per SKU with diameter × working length × overall length in mm, head construction and quantity. Working length is the useful drilling reach; overall length runs from the carbide tip to the shank end. We confirm each size combination against the selected head, rotary hammer and approved drawing before quotation and sample approval.