Anchor Bolt Drill Size Chart: Match the Anchor Model
Use the specified drill diameter for the exact anchor model. The examples below show why the thread size alone does not select the bit.
| Anchor example | Nominal thread | Specified drill diameter |
|---|---|---|
| fischer FAZ II Plus 10/10 GS R · 564665 | M10 | 10 mm |
| fischer EA II M10 × 40 · 48339 | M10 | 12 mm |
These are manufacturer-specific examples. Hole depth, cleaning, setting and permitted substrate follow that anchor’s instructions. For adhesive anchors, match the resin system, rod and approved drilling method.
Send the anchor model or a photo of its pack, required hole diameter and depth, hammer model and quantity. We match the drill-bit construction and prepare the OEM quotation.
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 |
| Fixed-Depth Stop Drill Bits | D × H · OEM | Match cutting diameter and stop depth for repeated fixing holes. |
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
Use the drilling depth specified for the exact anchor model, substrate and installation method. Drilling depth and effective embedment are distinct dimensions; any bottom clearance follows that system’s instructions. For fixed-depth stop bits, match both hole diameter and specified drilling depth, then confirm the cutting-tip datum and shoulder contact surface. Hole cleaning uses the brush, blowing or extraction equipment and sequence specified by the anchor system. Match the brush to the hole diameter. A stop drill bit controls depth; cleaning and anchor setting are separate installation steps.
2. Chemical Anchor Studs
Substrate: Concrete, hollow masonry (with screen sleeves)
Recommended: SDS-Plus 2-cutter, drill diameter specified by the selected adhesive-anchor system
Select drill diameter, hole depth, drilling method and any wall preparation from the adhesive-anchor instructions. Follow their cleaning, resin dispensing, insertion and temperature-dependent curing requirements before loading the anchor.
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?
Tell us your anchor types, diameters, and volumes. We will recommend the right bit specification and quote within 24 hours.
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.
More focused application
SDS-Plus Drill Bits for Cordless Concrete Anchor Drilling — We match SDS-Plus head geometry, flute and working length to cordless anchor drilling. Compare drilling time, holes per charge and hole quality with an application-matched OEM sample program.
Proposed OEM configurations
Plan an SDS-Plus fixed-depth drilling configuration for repeated concrete fixing holes. Choose the required hole diameter and stop depth, then send the configuration to our OEM team.
Option A · 2-cutter fixed-depth program
For repeated holes in plain concrete and masonry. Confirm diameter, stop depth, shoulder geometry and overall length against the selected fixing.
Option B · 4-cutter fixed-depth program
For concrete jobs requiring a four-edge head. We review aggregate, possible reinforcement contact, hammer platform and failure mode before confirming carbide architecture and joining.
Agree the stop-depth datum and tolerance, contact-face geometry, cutting diameter, run-out and batch sampling. A fixed stop controls penetration; flute evacuation, head wear and surface condition affect repeated drilling. Cleaning and anchor setting follow the fixing instructions.
Stop Drill Bit Diameter & Depth Matcher · Read the stop drill bit guide