ZDG-301L500 – 21-3/8-Inch Air Extension Die Grinder
The ZDG-301L500 Air Extension Die Grinder is a professional-grade, long-reach air die grinder engineered for high-speed grinding and polishing in hard-to-access or recessed areas. Built with an aluminum alloy extension shaft and ergonomic design, this grinder excels in delivering precision and productivity in demanding industrial environments.
Specifications
| Feature | Specification |
|---|---|
| Motor Power | 1.0 HP |
| Free Speed | 22,000 RPM |
| Collet Options | ¼″ (6 mm) and 3/8″ (8 mm) double-angle collet holders |
| Length | 21-3/8 in (~543 mm) extension shaft |
| Net Weight | 3.9 lbs (~1.8 kg) |
| Air Inlet | ¼″ NPT |
| Minimum Hose Size | ⅜″ (10 mm) |
| Air Consumption | ~4.2 CFM |
| Exhaust | Rear exhaust for cleaner operation |
| Grip & Safety | Comfort grip over-housing with streamlined safety lever |
| Construction | Robust aluminum alloy structure |
Advantages & Benefits
-
Extended Reach with Precision
The 21-3/8-inch shaft allows you to access deep or confined areas—perfect for detailed work inside engine bays, molds, or machinery interiors. -
High-Speed Efficiency
Operating at 22,000 RPM, this model delivers fast and smooth grinding with strong efficiency, maintaining control even in extended setups. -
Versatile Accessory Compatibility
Supports both 6 mm and 8 mm collets, offering flexibility to use a variety of grinding disks, burrs, or finishing tools. -
Ergonomic and Safe Design
The comfort grip and streamlined safety lever improve operator control and reduce fatigue during prolonged usage. -
Cleaner Work Environment
Rear exhaust design enhances user comfort by directing airflow—and any debris—away from hands and surfaces.
Common Applications
Best suited for:
-
Automotive Maintenance – Accessing deep-seated components, such as rotors, internal body panels, or backing plates.
-
Mold & Die Work – Precision finishing in internal cavities or molds without requiring tool disassembly.
-
Industrial Fabrication – Reaching into machinery assemblies or structural components where standard grinders can’t reach.
Quick Model Comparison
| Model | RPM | Length | Weight | Ideal For |
|---|---|---|---|---|
| ZDG-301L500 | 22,000 RPM | 21-3/8″ | 3.9 lbs | High-speed precision in deep workspaces |
| ZDG-3076L500 | 3,500 RPM | 21-3/8″ | 4.5 lbs | Higher torque, low-speed grinding needs |
Why Choose the ZDG-301L500?
If your work involves precision finishing in hard-to-reach areas, the ZDG-301L500 delivers exceptional speed, control, and ergonomics in one tool. Its design is tailored for professional applications where accuracy and access are critical—making it a trustworthy choice for serious industrial tasks.
Benefits
- Industrial extended shaft long die grinder design for high-speed grinding& polishing in hard-to-reach areas
- By using 1/4″( 6mm) or 3/8″(8mm) Double Angle Collets, the die grinder can be used in a wide range of grinding and polishing applications with various wheels
- 4000rpm models are excellent for grinding applications with a flap sanding wheel
- High productivity
- Highest durability in demanding applications
Features
- 12″ (305 mm), 21-3/8″ (543 mm), 31-1/2″ (800 mm) extended body by Aluminum alloy structure.
- Comfort grip over-housing
- Streamlined safety lever
- Rear exhaust
- 1/4″ (6mm) & 3/8″ (8mm) industrial grade Double Angle collet holder
- 1.0 hp motor
- 22,000 rpm free speed models and 3,500 rpm free speed models
 |
|
| ZST-200E-29 6mm COLLET ZST-200E-29-1 1/4″ COLLET |
ZST-200E-29-2 8mm COLLET ZST-200E-29-4 3/8″ COLLET |
Specification:
- 1HP Die Grinders
- Collet size: 1/4(6) inch(mm)
- Net Weight: 3.9(1.8) Ibs(kg)
- Length: 27(688) inch(mm)
- rpm: 22000
- Air Inlet: 1/4 inch
- Min.Hose Size: 3/8(10) inch(mm)
- Avg. Air Cons.: 4.2 cfm
* The length of the extended body can be customized to extend as required.
| Model | Collet size inch(mm) |
Net Weight lbs(kgs) |
Length inch(mm) |
rpm | Air Inlet inch |
MinchHose Size inch(mm) |
Avg. Air Cons. cfm |
| ZDG-301L300 | 1/4(6) | 2.9(1.3) | 17.5(445) | 22000 | 1/4 | 3/8(10) | 4.2 |
| ZDG-301L500 | 1/4(6) | 3.9(1.8) | 27(688) | 22000 | 1/4 | 3/8(10) | 4.2 |
| ZDG-301L800 | 1/4(6) | 4.9(2.2) | 37.1(943) | 22000 | 1/4 | 3/8(10) | 4.2 |
| ZDG-3076L300 | 1/4(6) | 3.5(1.6) | 18.7(477) | 3500 | 1/4 | 3/8(10) | 4.2 |
| ZDG-3076L500 | 1/4(6) | 4.5(2) | 28.3(719) | 3500 | 1/4 | 3/8(10) | 4.2 |
| ZDG-3076L800 | 1/4(6) | 5.5(2.5) | 38.3(974) | 3500 | 1/4 | 3/8(10) | 4.2 |
