Hilti DD 350-CA Heavy-Duty Diamond Core Drill Specs & Compatibility

VERIFIED SPECIFICATION · ACTIVE · Last verified 2026-09-05

20" stand-mounted rig concrete core drill

Maximum diameter: 20"
Power: 3600W
Voltage: 120V / 230V / 480V 3-phase options
Speeds: 260 / 1040 RPM
Spindle: Hilti DD-BI / BI+ Quick-Release (Proprietary)
Handheld: No
Stand capable: Yes
Wet drilling: Yes
Dry drilling: No
Safety clutch: Unknown / Not specified by manufacturer
Machine weight: 31.7 lb

Values are taken from manufacturer documentation and official manuals where cited in Sources. 10-speed electronic transmission (260-1040 RPM)

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Decision Summary

Specification analysis for Hilti DD 350-CA based on verified manufacturer manuals and operator documentation.

✓ Best Suited For

Contractors, core drilling specialists, and trades requiring documented core drilling capacity with verified bit compatibility.

✕ Who Should Skip

Operators requiring larger commercial diameters beyond machine rating, or standard rotary hammer SDS drilling.

Verified specification table

Specification	Value	Source status
Maximum diameter	20"	Manufacturer verified
Voltage	120V / 230V / 480V 3-phase options	Manufacturer verified
Power	3600W	Manufacturer verified
Low gear / min RPM	260	Manufacturer verified
High gear / max RPM	1040	Manufacturer verified
Spindle	Hilti DD-BI / BI+ Quick-Release (Proprietary)	Manufacturer verified
Handheld	No	Manufacturer verified
Stand capable	Yes	Manufacturer verified
Safety clutch	Unknown / Not specified by manufacturer	not listed
Water feed	Unknown / Not specified by manufacturer	not listed
Wet drilling	Yes	Manufacturer verified
Dry drilling	No	Manufacturer verified
Reinforced concrete	Unknown / Not specified by manufacturer	not listed
Machine / net weight	31.7 lb	Manufacturer verified

Source links appear in Sources & Verification below, not invented ratings.

Bit & Rig Compatibility

Spindle interface, bit connection standards, and rig pairing documentation.

Spindle Connection: Hilti DD-BI / BI+ Quick-Release (Proprietary)

This machine utilizes a Hilti DD-BI / BI+ Quick-Release (Proprietary) spindle. Diamond core bits matching this connection thread directly without adapters. Mismatched threads require a documented rigid arbor adapter.

Compatible core bits

Mechanical fit is not the same as a safe operating-speed fit. Bit published max RPM wins when lower than the machine gear.

SPEC-MATCHED 🟡

Hilti SPX-L Heavy Rebar Wet Core Bits 1/2″

SPEC-MATCHED 🟡

Connection Hilti BL Quick-Release / 1-1/4"-7 UNC ✓
Diameter 0.5" ✓
Machine capacity 20"
Method Wet
OEM pairing Not OEM-documented
Mechanical fit Aligned
Operating speed Unknown / incomplete RPM data
OEM fit Not OEM-documented

View Bit Details Check RPM

Milwaukee 48-17-5006 0.625″ Diamond Core Bit

SPEC-MATCHED 🟡

Connection 1-1/4"-7 UNC Female ✓
Diameter 0.625" ✓
Machine capacity 20"
Method Wet
OEM pairing Not OEM-documented
Mechanical fit Aligned
Operating speed Within published range
OEM fit Not OEM-documented

View Bit Details Check RPM

Milwaukee 48-17-5007 0.75″ Diamond Core Bit

SPEC-MATCHED 🟡

Connection 1-1/4"-7 UNC Female ✓
Diameter 0.75" ✓
Machine capacity 20"
Method Wet
OEM pairing Not OEM-documented
Mechanical fit Aligned
Operating speed Within published range
OEM fit Not OEM-documented

View Bit Details Check RPM

Milwaukee 48-17-5009 0.875″ Diamond Core Bit

SPEC-MATCHED 🟡

Connection 1-1/4"-7 UNC Female ✓
Diameter 0.875" ✓
Machine capacity 20"
Method Wet
OEM pairing Not OEM-documented
Mechanical fit Aligned
Operating speed Within published range
OEM fit Not OEM-documented

View Bit Details Check RPM

BLUEROCK Wet 1″ Diamond Core Bit

SPEC-MATCHED 🟡

Connection 1-1/4"-7 UNC Female ✓
Diameter 1" ✓
Machine capacity 20"
Method Wet
OEM pairing Not OEM-documented
Mechanical fit Aligned
Operating speed Unknown / incomplete RPM data
OEM fit Not OEM-documented

View Bit Details Check RPM

Hilti SPX-L Heavy Rebar Wet Core Bits 1″

SPEC-MATCHED 🟡

Connection Hilti BL Quick-Release / 1-1/4"-7 UNC ✓
Diameter 1" ✓
Machine capacity 20"
Method Wet
OEM pairing Not OEM-documented
Mechanical fit Aligned
Operating speed Unknown / incomplete RPM data
OEM fit Not OEM-documented

View Bit Details Check RPM

Milwaukee 48-17-5010 1″ Diamond Core Bit

SPEC-MATCHED 🟡

Connection 1-1/4"-7 UNC Female ✓
Diameter 1" ✓
Machine capacity 20"
Method Wet
OEM pairing Not OEM-documented
Mechanical fit Aligned
Operating speed Within published range
OEM fit Not OEM-documented

View Bit Details Check RPM

Diamond Products Core Bore Premium Black Wet Core Bits 1-1/2″

SPEC-MATCHED 🟡

Connection 1-1/4"-7 UNC Female ✓
Diameter 1.5" ✓
Machine capacity 20"
Method Wet
OEM pairing Not OEM-documented
Mechanical fit Aligned
Operating speed Unknown / incomplete RPM data
OEM fit Not OEM-documented

View Bit Details Check RPM

Find more compatible bits

RPM / gear guidance

10-speed electronic transmission (260-1040 RPM)

Documented RPM: 260 / 1040

Open RPM Calculator

Stand / adapter compatibility

Stand model: Unknown / Not specified by manufacturer
Stand compatibility: Hilti DD-HD 30 heavy-duty drill stand (with CutAssist auto-feed)
Adapter requirements: Unknown / Not specified by manufacturer
Adapter support: Unknown / Not specified by manufacturer

Water / slurry / dust

No evidence-backed water or dust accessory edges stored for this motor yet, do not invent recommendations.

Jobsite Setup & Operation

Operational workflow, slurry/water management, mounting procedures, and operator safety.

Water / slurry / dust

No evidence-backed water or dust accessory edges stored for this motor yet, do not invent recommendations.

Ownership & Service

Serviceability not verified for this model yet, fields remain UNKNOWN (not “parts unavailable”).

Authoritative Sources & Verification

CoringSpec specifications are extracted directly from primary manufacturer documentation and operator manuals. We do not invent lab scores or extrapolate unverified ratings.

Verified Documentation

Hilti DD 350-CA Operating Instructions (External Source)

Research & Verification Standards: This equipment profile was audited and verified against primary manufacturer technical documentation by the CoringSpec Technical Editorial Team. Specifications confirmed active as of 2026-09-05.

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