SDS-Plus Drill Bits for Anchor Bolt Installation
Process Overview
Anchor bolt installation is the most repetitive drilling operation on concrete construction sites. Every mechanical anchor (wedge, sleeve, drop-in) and every chemical stud requires a precisely drilled hole: correct diameter for pull-out strength, correct depth for full embedment, and clean walls for adhesive bond. The wrong drill bit costs you failed torque tests, rejected anchors, and lost time. Zhonghuan supplies 2-cutter bits for plain concrete and the ZHPLUS-5X 4-cutter cross for reinforced concrete. The same small-diameter anchor program covers concrete fixings for cable trays, conduit clips, HVAC hangers and pipe supports; large service penetrations require a separate coring system.
For distributors building an anchor range, this page connects jobsite requirements to our hammer drill bit manufacturer program instead of treating each diameter as a separate spot buy.
Recommended Products
| Product | Sizes | Application |
|---|---|---|
| SDS-Plus 2-Cutter (self-centering tip) | 6, 8, 10, 12, 14, 16, 20 mm | Anchor holes in plain concrete, masonry, lightweight block |
| ZHPLUS-5X 4-Cutter Cross | 6, 8, 10, 12, 14, 16, 20 mm | Precise anchor holes in reinforced concrete with incidental rebar risk |
| SDS-Plus Flat Chisel | 20 x 250 mm | Cleaning out anchor holes, removing concrete nibs |
Compatible Rotary Hammers
| Brand | SDS-Plus Models |
|---|---|
| Bosch | GBH 2-26 DRE, GBH 2-28 F, GBH 4-32 DFR |
| Hilti | TE 7, TE 7-C, TE 30, TE 30-A36 |
| DeWalt | D25133K, D25144K, DCH273 |
| Makita | HR2470, HR2631F, HR2811F |
| Milwaukee | M18 CHX, M18 FH, M18 FUEL 2912 |
Application Scenarios
1. Mechanical Wedge Anchors (Post-Installed)
Substrate: Reinforced concrete, C25/30 or higher
Recommended: ZHPLUS-5X 4-cutter SDS-Plus bit, diameter per anchor specification
Notes: Drill to embedment depth + 10 mm. Blow out dust with a hand pump (minimum 3 cycles: pump-brush-pump). Torque to manufacturer spec. On structural anchors, every hole must be verified for depth and cleanliness before anchor insertion.
2. Chemical Anchor Studs
Substrate: Concrete, hollow masonry (with screen sleeves)
Recommended: SDS-Plus 2-cutter, oversized by 2 mm vs stud diameter
Notes: Chemical anchors require a roughened hole wall for adhesive bond. Do NOT ream the hole smooth. Drill depth = stud length + 10-15 mm for adhesive overflow. Blow out dust thoroughly because chemical adhesive will not bond to dust-contaminated surfaces. Cure time varies by temperature: 24 hours at 5 degrees C vs 45 minutes at 20 degrees C.
3. High-Volume Facade Anchoring
Substrate: Concrete walls, insulated exterior
Recommended: SDS-Plus 4-cutter, 8-10 mm, long series (210-260 mm)
Notes: Long-series bits drill through insulation and into the structural concrete behind. Specify the released cutting diameter and circular run-out, then verify within-batch consistency with a defined sampling plan. Use a depth stop to keep embedment consistent across the facade.
Selection Tips
- Diameter: Always match the anchor manufacturer's specified drill diameter. Do not assume anchor diameter = drill diameter.
- Cutter type: Plain concrete and masonry = 2-cutter. Reinforced concrete with incidental contact risk = ZHPLUS-5X 4-cutter cross. Intentional rebar cutting requires the approved dedicated system.
- Length: Standard lengths (160-210 mm) for most anchors. Long series (260-450 mm) for deep embedment or through-insulation anchoring.
Need SDS-Plus Bits for Anchor Installation?
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Get a QuoteExit Spalling and Anchor Pull-Out
When you drill through a slab or wall for a through-bolt or sleeve anchor, the exit face spalls — a cone of concrete breaks off the back. That cone is lost embedment: the anchor near the exit no longer has confined concrete gripping it, so the rated pull-out value drops, and on a high-spec site an inspector can reject a hole whose exit breakout is too large.
You reduce the severity, honestly, three ways: a 4-cutter cross or self-centering 2-cutter spreads the impact and keeps the exit round instead of splitting off a block; ease the feed over the last 5–10 mm so the bit cuts the final layer rather than punching it out; and where the exit face is structurally critical, back it with a sacrificial board or drill from both faces. Geometry and a true-running bit help — technique and backing finish the job. The same logic that makes hole diameter a load-bearing tolerance makes the exit cone one too: both decide how much confined concrete is actually holding the anchor.