Precision Ball Nut Housing | BK-BF Series Ball Screw Nut Bracket

The BK-BF Nut Housing (often referred to as the DSG series nut seat) is a critical mechanical interface in any high-precision ball screw drive system. Its primary function is to house the ball nut and provide a rigid, square mounting surface to attach the ball screw assembly to the machine's moving table or gantry. Precision-machined from high-strength aluminum alloy or industrial-grade steel, these housings are designed with surgical tolerances to ensure perfect concentricity with the ball screw shaft. This eliminates potential binding and reduces axial play, which is essential for maintaining the high positioning accuracy required in CNC routing and milling. The robust construction effectively handles the high acceleration and braking forces generated during rapid axis travel, ensuring that the torque from the motor is translated into smooth, stable linear movement without mechanical deflection.

High-strength aluminum/steel construction for maximum rigidity
Precision-bored internal diameter for a secure ball nut fit
Standardized mounting hole patterns for easy gantry integration
Minimizes axial deflection and mechanical vibration during travel
Available in multiple sizes (DSG12, DSG16, DSG20, DSG25, DSG32)
Black anodized or polished finish for superior oxidation resistance

⚡ Quick Technical Datasheet:

Power OutputN/A

Max SpeedN/A

Voltage RatingN/A

Collet InterfaceER Standard

Shop Now

Comparative Technical Spindle Motor Configurations Matrix

Use the structural data catalog matrix below to evaluate power outputs, maximum RPM, operating voltages, and cooling styles across standard TriQuench CNC spindle models.

Spindle Capacity	Operating Speed	Operating Voltage	Cooling System
12.0 kW	18,000 RPM	380 V	Water-Cooled
0.8 kW	24,000 RPM	220 V	Air-Cooled (Long Shaft)
3.7 kW	40,000 RPM	380 V	Water-Cooled ISO20
9.0 kW	18,000 RPM	380 V	Air-Cooled

Technical Specifications

Technical Parameter	Engineering Specification Value
MODEL NUMBER	BK-BF Nut Housing Series (DSG)
MATERIAL	High-Grade Aluminum Alloy / Cast Steel
COMPATIBILITY	SFU / DFU Series Ball Nuts
AVAILABLE SIZES	12mm, 16mm, 20mm, 25mm, 32mm
MECHANICAL	mountingType: Bracket Style / Nut Seat \| precisionGrade: Industrial Grade Machining \| finish: Anodized or Industrial Coating

Industrial Applications

Usage Scenario	Target Industry
CNC Router X, Y, and Z Axis Assemblies	Machine Tool Manufacturing and CNC Fabrication
Linear Actuators and Precision Positioning Stages	Industrial Automation and Robotics
Industrial Milling and Lathe Machine Upgrades	Custom Machine Building and DIY CNC
3D Printing and Large-Format Additive Manufacturing	Woodworking and Cabinetry Machinery
Automated Laser and Plasma Cutting Gantry Systems	Precision Engineering and Metrology
Laboratory Equipment requiring Precise Linear Motion	General Engineering

Technical FAQ & Operational Guide

Does the housing come with the ball nut included?

No, the housing is a separate mounting accessory. It is designed to fit standard SFU/DFU ball nuts. When purchasing, ensure the housing size (e.g., DSG16) matches your ball screw diameter (e.g., 16mm).

What is the benefit of an aluminum housing over a custom-made steel one?

Our precision-cast aluminum housings offer an excellent strength-to-weight ratio, reducing the moving mass of your CNC gantry. They are also precision-bored to ensure the nut sits perfectly square, which is difficult to achieve with manual fabrication.

Are the mounting holes pre-threaded?

Yes, our nut housings feature pre-threaded holes for securing the ball nut and precision-drilled through-holes for mounting the housing to your machine carriage, ensuring a fast and accurate setup.

How is the rotational balancing calibrated on this spindle motor?

Every spindle motor is dynamically balanced in accordance with the ISO 1940 balancing standard to guarantee vibration-free running and maximum stability at high RPMs.

What are the runout tolerances of the shaft and collet interface?

The internal shaft taper maintains a runout accuracy tolerance of under 0.003mm (3 microns), maintaining precise tool concentricity and preventing premature cutter wear.

What cooling precautions are built-in to prevent heat exhaustion?

Built-in temperature dissipation channels support continuous water/liquid cooling circulation or forced fan airflow, preventing thermal expansion of components.

Is this spindle motor compatible with standard VFD inverters and collets?

Yes, the spindle supports direct electrical integration with standard variable frequency drives (VFD) and accepts industrial ER collets (ER11, ER20, ER25, or ER32) to match standard toolholder dimensions.

Request Quote

Share your requirements, and we’ll provide a tailored quote.

Please wait...

Precision Ball Nut Housing | BK-BF Series Ball Screw Nut Bracket

High-strength aluminum/steel construction for maximum rigidity

Precision-bored internal diameter for a secure ball nut fit

Standardized mounting hole patterns for easy gantry integration

Minimizes axial deflection and mechanical vibration during travel

Available in multiple sizes (DSG12, DSG16, DSG20, DSG25, DSG32)

Black anodized or polished finish for superior oxidation resistance

⚡ Quick Technical Datasheet:

Power OutputN/A

Max SpeedN/A

Voltage RatingN/A

Collet InterfaceER Standard

Comparative Technical Spindle Motor Configurations Matrix

Use the structural data catalog matrix below to evaluate power outputs, maximum RPM, operating voltages, and cooling styles across standard TriQuench CNC spindle models.

Spindle Capacity	Operating Speed	Operating Voltage	Cooling System
12.0 kW	18,000 RPM	380 V	Water-Cooled
0.8 kW	24,000 RPM	220 V	Air-Cooled (Long Shaft)
3.7 kW	40,000 RPM	380 V	Water-Cooled ISO20
9.0 kW	18,000 RPM	380 V	Air-Cooled

Technical Parameter

Engineering Specification Value

MODEL NUMBER

BK-BF Nut Housing Series (DSG)

MATERIAL

High-Grade Aluminum Alloy / Cast Steel

COMPATIBILITY

SFU / DFU Series Ball Nuts

AVAILABLE SIZES

12mm, 16mm, 20mm, 25mm, 32mm

MECHANICAL

mountingType: Bracket Style / Nut Seat | precisionGrade: Industrial Grade Machining | finish: Anodized or Industrial Coating

Usage Scenario

Target Industry

CNC Router X, Y, and Z Axis Assemblies

Machine Tool Manufacturing and CNC Fabrication

Linear Actuators and Precision Positioning Stages

Industrial Automation and Robotics

Industrial Milling and Lathe Machine Upgrades

Custom Machine Building and DIY CNC

3D Printing and Large-Format Additive Manufacturing

Woodworking and Cabinetry Machinery

Automated Laser and Plasma Cutting Gantry Systems

Precision Engineering and Metrology

Laboratory Equipment requiring Precise Linear Motion

General Engineering