Industrial Diamond Core Drill Compendium

Why Choose CONSEC

• High-Durability Japanese Engineering Packed into a Lightweight Body

  At just 13.6 kg, this machine delivers a high-performance motor built to strict Japanese quality standards. Stable and durable across temperature swings and demanding conditions, it keeps site stoppages and productivity losses to a minimum—no special tools required for servicing. With an in-house construction department channeling real-world drilling challenges directly into product development, CONSEC continuously refines a design that is both lightweight and built to last.

• The proprietary Automatic Feeding System curbs part wear and premature failure

  The proprietary Automatic Feeding System uses smart controls that read drilling load in real time and hold optimal cutting pressure. By physically preventing over-feed—which is difficult to control manually—it significantly reduces abnormal wear and premature failure of expensive diamond core bits. Holds steady drilling speed, pushes consumable life to the limit, and drops cost per hole.

• Precise Drilling to Specification Even in Confined Spaces

  With a compact 254×353×456 mm footprint and a one-touch left/right switchable handle, the drill is designed for coring in space-restricted environments. Even in locations where larger machines cannot reach—apartment hallways, storefront walls, and above-ceiling spaces—it achieves high-precision drilling with minimal bit runout. Because diamond tools are manufactured in CONSEC's own factory, the cutting edge can be fine-tuned to match on-site materials and applications, with custom-order builds also available.

CONSEC Main Lineup

SPN-203At

A standard model focused on core performance. Powered by a single-phase 110V supply, delivering 2,400W of output. No-load speed runs at 760 rpm, with drilling capacity up to 205 mm (8"). The drill uses an A-rod thread to provide versatile specs that cover basic drilling tasks across a wide range of jobsites.

Core Drill Specifications

Model Name	SPN-203At	Power Source	110V
Rated Current	15A	Maximum Output	2,400W
No-load speed	760min⁻¹	Maximum bit diameter	205mm (8”)
Spindle thread	A-rod	Size W×L×H	247×328×413mm
Weight (Drill Head only)	10.8kg	Drill Carriage Assy.	Included
Pole Base	Not included. SB-491 series, SB-494 series and AB-491 series can be combined.

Source: CONSEC CORPORATION Official Website (https://www.consec.co.jp/article_source/data/en_product/detail/162.html)

SPZ-253U2i

A middle class Drill Head built for work at confined spaces. Featuring a middle class Drill Head powered by single-phase 230V with a 2,400W Japanese-made motor. Two-speed no-load speed at 490/1,150 rpm, with drilling capacity up to 254 mm (10"). Equipped with a slipping clutch, One-Touch-Handle, and Swiveling Water Supply Cock. Versatile for tight spaces and Automatic Feeding System retrofits.

Core Drill Specifications

Model Name	SPZ-253U2i	Power Source	230V
Rated Current	8.7A	Maximum Output	2,400W
No-load speed	490 / 1,150 min⁻¹	Maximum bit diameter	254mm (10")
Spindle thread	1 1/4"-7UNC	Size W×L×H	254×353×456mm
Weight (Drill Head only)	13.6kg	Safety Certification	CE
Drill Carriage Assy.	Included	Pole Base	Not included. SB-491 series, SB-494 series and AB-491 series can be combined.

Source: CONSEC CORPORATION Official Website (https://www.consec.co.jp/article_source/data/en_product/detail/158.html)

SPO-400U3w

Heavy-duty Drill Head with 3-speed switching for large-diameter drilling. A heavy-duty Drill Head powered by single-phase 120V with a 3,600W Japanese-made motor. Three-speed no-load speed at 300/700/950 rpm, with drilling capacity up to 406 mm (16"). Equipped with a slipping clutch, Swiveling Water Supply Cock, and One-Touch-Handle. Supports Automatic Feeding System retrofits. This higher-end model is designed to deliver stable drilling performance even in large-diameter, high-load jobsite conditions.

Core Drill Specifications

Model Name	SPO-400U3w	Power Source	120V
Rated Current	24A	Maximum Output	3,600W
No-load speed	300 / 700 / 950 min⁻¹	Maximum bit diameter	406mm (16")
Spindle thread	1-1/4"-7UNC	Size W×L×H	241×393×483mm
Weight (Drill Head only)	16.9kg	Drill Carriage Assy.	Included
Pole Base	Not included. SB-594 series and AB-591-1085 can be combined.

Source: CONSEC CORPORATION Official Website (https://www.consec.co.jp/article_source/data/en_product/detail/166.html)

Video of Operating a Diamond Core Drill

CONSEC Brand Features and Support

• Custom solutions for
  specialized jobsites

  When standard drills fall short, CONSEC engineers application-specific units and attachments tailored to the job. Examples include attachments that prevent drilled cores from falling and remote-controlled feed systems for restricted-access work areas, all developed in response to real on-site challenges. CONSEC also rethinks the drilling method itself to support drilling operations in specialized environments.

• Continuous product improvement driven by
  insights from the in-house construction department

  A key manufacturer strength is HAKKEN, CONSEC's in-house construction department. Real-world operational issues, such as equipment limitations and worker physical strain, are gathered directly from the field and fed back into product R&D. This hands-on feedback fuels improvement based on user experience, providing buyers with tools that they can rely on for the long haul.

CONSEC Company Information

Source: CONSEC CORPORATION Official Website (https://www.consec.co.jp/en/)

Source: CONSEC CORPORATION Official Website (https://www.consec.co.jp/company/group/)

Why Choose Hilti

• Cut Assist function provides fully automated drilling for reduced labor

  The Cut Assist function features continuous digital control of cutting pressure and water flow. Once the equipment is set up and started, the drill completes drilling fully automatically and shuts off upon completion. Operators no longer need to continuously monitor the machine. This saves significant labor on large-scale jobsites where hundreds of holes are required.

• Electronic controls for operator safety

  Active Torque Control (ATC) instantly detects bit jams during drilling. Electronically stops sudden kickback before it injures workers—shielding operators from impact. Designed to easily meet strict safety standards, ATC reduces the risk of human-error accidents and lightens the load on project-wide safety management.

• Cordless power enhances mobility on large jobsites

  The lineup is powered by Hilti's proprietary battery platform "Nuron." Even on new-build sites without easy access to power and on awkward elevated work zones, there is no need to deal with power cables. Eliminating the need for cable routing and generator relocation improves work efficiency, particularly on large infrastructure projects where drilling locations are widely dispersed.

Hilti Main Lineup

DD 250-CA

Fully automated for heavy-duty drilling and reinforced concrete. Paired with the optional DD AF-CA H auto-feed unit, the Cut Assist function automatically optimizes drilling speed and water flow—maintaining stable drilling even through rebar, without manual adjustment. Covers a wide diameter range from 12 mm to 500 mm, making it ideal when multiple drilling processes need to be handled with one machine.

Core Drill Specifications

Diameter range	15/32 - 19-11/16 in	Base material	Concrete, Reinforced concrete, Asphalt
Operation mode	Rig-based drilling system	Number of gears	4
Weight (without battery)	34 lb	Weight of complete system	81 lb
Dimensions (L×W×H)	24.8×7.5×8.5 in	Sound pressure level	93 dB (A)
No load RPM	gear 1: 240 rpm; gear 2: 580 rpm; gear 3: 1160 rpm; gear 4: 2220 rpm

Source: Hilti Official Website (https://www.hilti.com/c/CLS_POWER_TOOLS_7125/CLS_DIAMOND_CORING_7125/r12321865?activeTab=preconfigured-kits-tabs)

DD 160-22

A high-power rig-based drill on the Nuron battery platform. This rig-based cordless diamond core drill is engineered for mid-diameter coring from 52 to 162 mm. Even cordless, it efficiently delivers the power needed for continuous drilling in high-strength concrete.

Core Drill Specifications

Diameter range	1-31/32 - 6-3/8 in	Base material	Asphalt, Concrete, Reinforced concrete
Operation mode	Rig-based drilling system	Rated input power	1650W
Number of gears	Not specified on the Official Website	Weight (without battery)	15 lb
Weight of complete system	41 lb	Sound pressure level	87 dB (A) 1
Corner accessibility	4 in

Source: Hilti Official Website (https://www.hilti.co.jp/c/CLS_POWER_TOOLS_7125/CLS_DIAMOND_CORING_7125/r18888607)

DD 110-U-22

Compact model supporting both handheld and rig-based operation. This compact cordless diamond core drill runs on the Nuron battery platform. Capable of drilling holes ranging from 12 to 132 mm, it can be operated handheld or rig-based. This model is easy to maneuver and ideal for tight, confined spaces.

Core Drill Specifications

Diameter range	15/32 - 5-3/16 in	Base material	Masonry, Asphalt, Concrete, Reinforced concrete
Operation mode	Hand-held and rig-mounted drilling system	Rated input power	1650W
Number of gears	24	Weight (without battery)	16.3 lb
Weight of complete system	42 lb	Sound pressure level	101 dB (A) 1
Corner accessibility	4.7 in

Source: Hilti Official Website (https://www.hilti.com/c/CLS_POWER_TOOLS_7125/CLS_DIAMOND_CORING_7125/r18888605?activeTab=preconfigured-kits-tabs)

Video of Operating a Diamond Core Drill

Hilti Brand Features and Support

• Immediate on-site support
  through a direct sales system

  Hilti's direct sales personnel bring real product expertise to the job site to help crews solve problems on the spot. Eliminating the distributor in the middle means everything moves faster, from product demos to on-site tech support. Communicating directly with Hilti allows customers to get accurate, fast guidance on unexpected issues that arise on site.

• Fleet Management that reduces
  the burden of tool management

  Hilti's Fleet Management service bundles products, services, and repairs into a single monthly fee. It even includes coverage for theft, helping reduce surprise expenses and other financial risks. Unique labels and an online tool list increase the transparency of tool management and reduce paperwork. Trust your tool management to the manufacturer so you can stay focused on the work that matters.

Hilti Company Information

*As of March 23, 2026

Source: Hilti Official Website (https://www.hilti.co.jp/content/hilti/A1/JP/ja/company/corporate-information/about-hilti.html)

Why Choose CAYKEN

• Achieving exceptionally low pricing for a specialized product

  Handheld drills start in the $100s, while rig-base drills start in the $200s(*). This price point offers competitive pricing among manufacturers specializing in diamond core drills. Pricing is set at a level that customers can approve without hesitation. This makes CAYKEN practical as a backup for an unexpected failure of the primary drill or as added inventory when peak-season work requires extra crews. The lower cost per unit makes owning multiple machines a realistic way to spread downtime risk across the fleet.

• A mechanical gearbox engineered for core performance with reduced risk of failure

  CAYKEN skips complex electronics for a mechanical gearbox—fewer parts, fewer failures. Even at harsh jobsites filled with slurry and concrete dust, operators don't have to worry about drill malfunction due to failure of electronic components. As a manufacturer specializing in diamond core drills, CAYKEN focuses on the core job of reliably drilling clean holes. The rugged mechanical structure of its drills provides peace of mind at jobsites.

• A rigid aluminum stand built for heavy daily use

  Extruded aluminum keeps the stand light enough to handle, while a rigid construction minimizes flex and twist during operation. The design makes setup and breakdown easier on the jobsite. Also, reduced bit wander during drilling ensures consistent accuracy of finished holes. Even in backup tasks or spot operations, it delivers the consistent precision and quality required on professional jobsites.

*Among the 15 brands ranking at the top of a Google search for "diamond core drill," these models are priced below the category average and are among the lowest in both rig-based and handheld categories (based on the editorial team's independent research as of April 17).

CAYKEN Main Lineup

OND-925 (E)

Perfect when one drill has to handle multiple tasks. Stepless speed regulation lets operators dial in the right RPM for concrete, stone, metal, or glass, while soft start and overload protection support safe operation. A vertical stand with integrated PRCD protection is included as standard, with drilling capacity up to 250 mm (9-7/8").

Core Drill Specifications

Drilling range	Up to 250 mm (up to 10 in)	Base material	Concrete, Brick, Stone, Metal, Glass
Rated voltage	220V	Rated frequency	50-60Hz
Rated input power	4350W	No load RPM	480 rpm
Cable length	3.5 m	Borehole depth	550 mm
Net/Gross weight	≤19.5 / 22 kg	Column length	900 mm

Source: CAYKEN Official Website (https://caykentools.com/diamond-core-drill-machine/ond-925e-diamond-core-drill/)

SCY-18/2EBM

A lightweight and portable drill with stepless variable speeds for handheld drilling. This handheld model pairs stepless speed regulation with soft start to suppress the kickback that comes from abrupt startups. A D-handle design delivers a secure grip, with drilling capacity up to 132 mm (5-3/16") in brick and 80 mm (3-1/8") in concrete.

Core Drill Specifications

Brick drilling range	up to 5" (up to 132 mm)	Concrete drilling range	up to 3" (up to 80 mm); up to 4" (up to 100 mm) in drill stand
Rated voltage	220V and above	Rated frequency	50 - 60 Hz
Rated input power	1900W	No-load speed	720 - 1230/1780 rpm
Cable length	3.5 m	Borehole Depth	350 mm
Net/Gross weight	≤4.5/8.1 kg	Packing size	53×14×34 cm
Packing Material	Plastic

Source: CAYKEN Official Website (https://caykentools.com/diamond-core-drill-machine/scy-18-diamond-core-drill/)

SCY-1780/3EBS

A versatile multi-speed model with an oil-immersed gearbox. Equipped with three gear speed regulation, this model allows operators to select the optimal RPM according to the core bit diameter and the material being processed. The oil-immersed gearbox enhances durability, while the safety clutch and overload protection functions ensure stable and reliable drilling performance.

Core Drill Specifications

Brick drilling range	up to 7" (up to 180 mm)	Concrete drilling range	up to 5" (up to 125 mm); up to 6" (up to 150 mm) in drill stand
Rated voltage	220V and above	Rated frequency	50 - 60 Hz
Rated input power	1900W	No-load speed	700/1500/2980 rpm
Cable length	3.5 m	Borehole Depth	380 mm
Net/Gross weight	≤7.8/12.2 kg	Packing size	53×17×43 cm
Packing Material	Plastic

Source: CAYKEN Official Website (https://caykentools.com/diamond-core-drill-machine/scy-1780-diamond-core-drill/)

Video of Operating a Diamond Core Drill

CAYKEN Brand Features and Support

• Customer support system
  for answering technical questions

  A customer support desk is staffed during weekday business hours. Expert staff assist with everything from initial equipment consultations to technical inquiries during operation. Even if the product is from an overseas manufacturer, CAYKEN makes it easy for operators to consult with staff about any operational questions, enabling smooth troubleshooting on site.

• Online resources make
  documentation easy to find

  CAYKEN runs an online service that is available anytime. Users can download detailed electronic product catalogs and instruction manuals. Even if specifications suddenly need to be checked on the jobsite, or if a manual has been misplaced, information can be accessed instantly from a smartphone or tablet.

CAYKEN Company Information

*As of March 23, 2026

Source: CAYKEN Official Website (https://caykentools.com/about/)