National Equipment 8274-4 Planetary Grinder, 18", Hi-Power, 120 Volt - 8274-4

SKU 8274-4

Regular price: $14,273.19
Sale price: $13,982.60

Regular price: $14,273.19
Sale price: $13,982.60

Quantity

Estimated shipping time

You can typically expect your items to arrive within 4–7 business days, depending on your location and product availability.

What is your Return Policy?

At Prime Machinery Supply, we want every customer to shop with confidence. If something doesn’t go as planned, we’ve made returns and refunds simple and fair. Here’s how it works:

1. Return Window

You can request a return within 30 days of receiving your order. Unfortunately, we’re unable to accept returns after that time frame.

2. Who Pays for Return Shipping?

If your item arrives damaged, defective, or incorrect, we’ll cover the return shipping cost.
If you’re returning an item because you changed your mind, you’ll be responsible for return shipping fees.

3. Damaged or Defective Items

Received something broken or not working properly? Contact us within 30 days. We’ll provide a prepaid return label and once the item is returned and inspected, we’ll issue either a full refund or a replacement—including any original shipping costs.

4. Changed Your Mind?

If you no longer want the item, you can return it within 30 days—as long as it's unused, in its original packaging, and in resellable condition. You’ll need to handle the return shipping, and once we receive and inspect it, we’ll refund the product cost (excluding shipping).

5. Refund Processing

Once we receive and approve your return, we’ll send a confirmation email and issue a refund to your original payment method within 7 business days. Please allow additional time for banks or credit card companies to process and reflect the refund.

If it’s been over 10 business days since your refund was approved and you still don’t see it, contact us at support@primemachinerysupply.com and we’ll look into it immediately.

6. Restocking Fees

In some cases, a restocking fee may apply depending on the item and return reason. If applicable, we’ll clearly communicate this during your return request process.

Product Description

National Equipment 8274-4: The Versatile and Powerful Floor Grinding Solution

The National Equipment 8274-4 is a high-performance, 18-inch planetary grinder engineered to conquer diverse concrete floor preparation and polishing assignments. Driven by a heavy-duty, high-torque motor and packed with specialized design features, this robust machine offers commercial flooring professionals an incredibly versatile, user-friendly solution for achieving flawless surface finishes.

Key Features

Unmatched Power: Delivers 3 HP at 115V for efficient grinding performance, adjusting to both small and large jobs (15 or 20 amp operation).
Variable Speed Control: Fine-tune grinding speed for optimal results on different materials and applications.
Soft Start and Electronic Control Box: Minimizes breaker tripping and ensures smooth operation.
Three-Part Adjustable Handle: Offers customizable comfort and ergonomic control.
Forward and Reverse Controls: Enhance tooling life and promote even wear on consumables.
Dual Rear Vacuum Ports: Connect vacuum systems for optimal dust collection and improved air quality.
Flip-Style Weights: Easily adjust head pressure for different grinding requirements.
Removable Handle and Weights: Facilitate convenient transportation and storage.
18-Inch Grinding Path: Covers a large area for efficient grinding.
Self-Tensioning, Single-Belt Design: Ensures consistent belt tension and optimal grinding performance.
Adjustable Velcro Dust Guard: Enables dustless operation and allows close work to walls (within 1/8 inch).
90° Rotating Grinder Head: Provides easy access for tool changes.
Morflex Couplers: Assist in polishing uneven surfaces and creating uniform scratch patterns.
On/Off Switch on Handle: Offers convenient control for improved user experience.

Specifications

Width: 20 inches (50.8 cm)
Disk Size: 18.5 inches (46.99 cm)
Max Height: 52 inches (132.1 cm)
Min Height: 27.5 inches (69.85 cm)
Max Length: 75 inches (190.5 cm)
Min Length: 38.5 inches (97.8 cm)
Weight: 388 lbs (176 kg)
Drum RPM: 133.8
Motor RPM: 400-2000
Motor Phase: Single
Horsepower: 3
Amps: 15 or 20
Voltage: 115V
Frequency: 60 Hz

About National Flooring Equipment

Our company was founded in 1968 when the Anderson family began developing new flooring tools in their garage in Minnesota. From there, they started designing surface preparation equipment with a focus on durability and long-lasting performance. The Olson family bought National in 2007, shifting the company’s primary focus to industrial-grade surface preparation and floor removal equipment, with a focus on customer service. The Olsons built upon the Andersons’ tradition of quality products and competitive pricing.

Over time, they introduced larger floor removal equipment to the market, expanding their operations, reputation, and customer base. Thanks to their vision, National now has over 50 patents registered in the United States and around the world, giving us a global presence unmatched in our industry. We’re incredibly proud of the level of customer service everyone at National provides. It’s not unheard of for a National representative to personally deliver a piece of equipment when a contractor needs it quickly to complete a project. We’re here for our customers seven days per week, ready to solve problems with tools that make their job easier.

Proudly Built in America

Our products are made right here in the United States, where quality assurance standards are among the highest in the world. When you buy domestically, you benefit from accessible facilities, more reliable supply chains, and superior products. We’re also there for our global customers with local service teams ready to lend a hand when required.

We're proud to build locally, ship globally, and help you solve problems no matter where you're located. This approach is how we built our company, and it will always be part of how we do business.