Description
Great Oak Curated Industrial Equipment:
Part of our industrial collection, selected for durability and performance.
Features & Details
- 4-inch Wet Drilling: Our lightweight handheld core drilling machine is designed for wet drilling, ensuring precision when boring holes in a variety of surfaces with a 3.1–4 in / 8–10.2 cm diameter capacity. More importantly, it includes an industrial-grade 4in core bit with 1-1/4" thread.
- Two-Speed Gearbox: Our 2-speed electric core drill, 1100RPM / 2400RPM, features a convenient gearbox enabling variable speeds to match material type and optimize control for precise drilling. Equipped with a 1500W motor for powerful, consistent performance.
- Effortless Drilling: Our handheld drilling rig features a rustproof steel forged output shaft designed to withstand greater pressure, an upgraded one-touch water pipe connector for a stable water supply, and a shoulder rest to enable easy carry on the shoulder and minimize friction during drilling.
- 2 Bubble Levels for precision: Two fluorescent yellow-green measuring bubble levels are mounted on the core drilling housing to facilitate convenient, accurate, and easy adjustments. The bubble is clearly visible from all angles, enabling precise bit positioning and ensuring holes are drilled at the same level.
- Built for Heavy-Duty Concrete Drilling: The compact size makes it easy to maneuver in drilling reinforced concrete, red brick, marble, and other materials. Our wet diamond core drilling rig will surely meet professional demands and is for more than just home use. With our compact drill kit, you can quickly install air conditioners, kitchen pipes, stair railings, repair highways, etc.
Technical Specifications
| Item Model Number | Z1Z-CF02-80 |
|---|---|
| No-load Power | 800W |
| Rated Power | 1500W |
| Dual Speed | 1100RPM / 2400RPM |
| Drilling Diameter | 3.1-4 in / 8-10.2 cm |
| Drilling Depth | 15.75 in / 40 cm |
| Arbor Size | 1-1/4″ Thread |
| Number of Bubble Level | 2 |
| Drilling Method | Wet Drilling |
| Drill Bit Size | Φ 4 x 15.75 in / 10.2 x 40 cm |
| Product Size | 20.86 x 14.56 x 4.48 in / 53 x 37 x 11.4 cm |
| Net Weight | 25.59 lbs / 11.61 kg |
Detailed Overview
2-Speed Electric Core Drill Machine
Our 4-inch wet drilling machine is suitable for plumbing, electrical, HVAC, and construction projects. The compact size and lightweight design make it easy to maneuver in tight spaces, while the powerful motor and two-speed gearbox provide the versatility to tackle a variety of materials.
The 1500W robust motor easily loosens the reinforced concrete wall with a rotary speed of 1100RPM / 2400RPM, widely used in road construction, home decoration, and Routine maintenance activities.
With a 1-1/4in universal thread, this 4-in core drill bit allows rapid assembling to more than 90% of core drilling machines. Start drilling at the vertical position, then continue to dig deep, and you will get a perfect hole in a second.
The bubble inside the circle will tell that the object’s surface is level, as the bubble shows in the middle of the circle.
The unique shoulder rest is designed for comfortable handling. Blow-molded carrying case included for easy storing, classification, and convenient carrying.
Note: Great Oak Industrial Supply Corp. specializes in sourcing high-performance industrial tools. Manufactured by VEVOR.



























Verified Customer –
Good tool. I have the 1800 rpm unit and the bit ran true so it was relatively easy to start the hole with a smooth running machine.
Once the hole the hole was started I went through 14″ of concrete in 10 minutes.
The ways and wear surfaces on the movable part of this drill press are well done.
I bought a garden-hose-thread to 5/16″ hose barb adapter from Lowe’s and used a valve at the hose end to control the flow rate. The pressure at my site was too high for the flimsy hose provided, so I cut the pressure down before the little hose.
Happy camper.
Verified Customer –
Works great
Verified Customer –
Very impressed outstanding strong drill
Verified Customer –
Delivery was great. The price is phenomenal.(the last one I bought back in 2004 was an Ebianstock and that cost me around $1300…. so 250 is pretty sweet! That all being said do not I repeat do not lock the trigger!!!!! this is not like your traditional horror drill. There is no clutch so when it hangs up, you’re gonna go for a ride… I know because it almost knocked me the fuck out!!! my fault not the tools!
Verified Customer –
It’s so beautiful and strong machine I really recommend to anyone who looking for this
Verified Customer –
The drill worked great for 5″ boring on block walls dry and a 14″ wide concrete wall wet. The hose connection and tubing that come with the drill for wet use do not connect to any US connections. You have to get your own adaptors. The shoulder rest screws in with the rubber cover removed and that is not clear in the instructions. It also needs to be removed for the drill to go back into the plastic carrying case. Bottom line it worked great and exceeded my expectations.
Verified Customer –
I BOUGHT THIS DRILL TO CORE THROUGH ROCKS IN A CUSTOMERS SWIMMING POOL, SOME HOLES OVER 36 INCHES DEEP.
DRILLED THROUGH 6 LIKE THIS AND IT WAS FLAWLESS. HAD TO BUY THE EXTENSIONS THROUGH ANOTHER SITE BUT THAT WAS NO PROBLEM. THIS BABY MADE ME A TON OF MONEY. PAID FOR ITSELF 10 TIMES OVER.
BUYING ANOTHER 2 JUST TO HAVE THEM.
A++
Verified Customer –
Good price and fast delivery.
Verified Customer –
Product is perfect for what we use it for. Coring 2”-4” holes to set handrail posts. Highly recommend
Only issue is getting what is needed for the constant water flow hook up but manageable and still works great
Verified Customer –
Works great! Hard finding attachment for water feed though.