Gun Drill Spindle
150ZD20G3.7
Purpose-built spindle for deep hole gun drilling. 20,000 r/min, 3.7 kW, coolant-through-spindle. Max drill depth 1500mm. IP65 protected for wet machining environments.
150ZD20G3.7 Gun Drill Spindle
The 150ZD20G3.7 is a specialized spindle designed explicitly for gun drilling and deep hole machining operations. Operating at speeds up to 20,000 r/min with 3.7 kW of power, this spindle is optimized for the unique demands of deep hole drilling -- including high-pressure coolant delivery through the spindle, consistent feed force, and reliable operation during extended drilling cycles up to 1500mm depth.
The spindle accommodates gun drills for hole diameters from 3mm to 25mm, making it suitable for a wide range of deep hole applications from small-diameter coolant passages to deep hydraulic manifold drilling. P4 precision angular contact ball bearings provide the axial and radial rigidity necessary to maintain hole straightness and diameter accuracy throughout the drilling cycle. The water-cooling system ensures stable thermal conditions during continuous operation, while sub-micron runout accuracy contributes to precise hole positioning and superior surface finish inside the bore. With IP65 protection for wet machining environments, the 150ZD20G3.7 is built to withstand the demanding conditions of deep hole drilling with high-pressure coolant. Housed in a 150mm diameter body and weighing approximately 42 kg, it integrates into dedicated gun drilling machines, CNC deep hole drilling centers, and custom deep hole machining setups for mold cooling channels, hydraulic manifolds, automotive crankshaft oil passages, and aerospace component drilling.
Download Drawing Get a QuoteDetailed Parameters
| Speed (r/min) | 20000 |
| Power (kW) | 3.7 |
| Torque (Nm) | 1.8 |
| Motor Type | Asynchronous Motor |
| Max Drill Depth | 1500mm |
| Drilling Diameter Range | 3mm - 25mm |
| Drill Type | Gun drill (deep hole drilling) |
| Coolant System | Coolant-through-spindle |
| Bearing Type | P4 Angular Contact Ball Bearings |
| Bearing Arrangement | Back-to-Back (DB) with preload |
| Bearing Lubrication | Grease lubrication |
| Runout Accuracy | ≤ 0.001mm at spindle nose |
| Cooling Method | Water-jacket cooling with external chiller |
| Housing Diameter | 150mm |
| Housing Material | Alloy Steel (42CrMo4) |
| Spindle Weight | ~42 kg |
| Protection Class | IP65 (wet machining rated) |
| Noise Level | ≤ 72 dB(A) at max speed |
| Balancing Grade | G0.4 per ISO 1940-1 |
| Sensor Integration | Built-in temperature sensor (PT100) |
| Mounting Orientation | Horizontal |
| Application | Deep hole gun drilling / mold cooling channels / hydraulic manifolds |
Available Options & Customizations
- P4 hybrid ceramic bearings for extended life
- High-pressure coolant system (up to 150 bar)
- Custom drill shank interfaces
- Built-in vibration monitoring sensor
- Rotary encoder for controlled-depth drilling
- Tool breakage detection sensor
Built for Deep Hole Precision
The 150ZD20G3.7 combines purpose-built design with precision engineering for reliable gun drilling and deep hole machining operations.
Purpose-Built for Gun Drilling
Optimized spindle design for the unique demands of deep hole machining and coolant-through-spindle operation.
1500mm Depth Capability
Supports deep hole drilling operations up to 1.5 meters in depth with consistent accuracy.
20,000 rpm Speed Range
Wide speed range accommodates drills from 3mm to 25mm diameter.
Coolant-Through-Spindle
High-pressure coolant delivery through the spindle for efficient chip evacuation and drill cooling.
P4 Precision Bearings
High-rigidity angular contact bearings maintain hole straightness and diameter accuracy.
IP65 Wet Machining Protected
Fully sealed against high-pressure coolant and swarf ingress for reliable wet machining.
Water Cooling
Stable thermal conditions ensure consistent drilling accuracy throughout long machining cycles.
Lightweight 42 kg Design
Compact design at 150mm housing enables easy integration into dedicated gun drilling machines.
Request a Quote for 150ZD20G3.7
Tell us your drilling depth requirements, material specifications, and production volume. Our engineering team will provide a detailed proposal with pricing, lead time, and integration support. 24-hour response guaranteed.