Products

The Ultimate Guide to Different Drill Bit Types: How to Choose the Right Tool for the Job

Dezhou Drillstar Cutting Tool Co., Ltd. officially resumed production amidst a festive and auspicious atmosphere.

Dezhou Drillstar Cutting Tool Co., Ltd. 2026 Year of the Horse Gala: A Resounding Success – Forging Precision, Riding the Wind of Progress

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Deep Hole Honing Tool

This is a Deep Hole Honing Tool (also known as a Mandrel Honing Tool), a precision finishing tool designed for internal surface refinement of deep holes with high depth-to-diameter ratios. It is ideal for achieving ultra-smooth surfaces and tight dimensional tolerances in industries like aerospace, hydraulics, and mold manufacturing.

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Description

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Core Function & Working Principle

Precision Finishing: The abrasive stones (yellow segments) mounted on the expandable mandrel remove minute amounts of material, correcting minor geometric errors (e.g., taper, out-of-roundness) left by prior drilling or boring operations.
Expandable Design: As the tool rotates and reciprocates, the mandrel expands radially, applying consistent pressure between the abrasive stones and the hole wall. This ensures uniform material removal across the entire hole depth.
Deep Hole Adaptability: Its slender, rigid construction minimizes deflection during long-stroke honing, making it suitable for holes with depth-to-diameter ratios > 20:1.

Key Structure & Materials

Component	Function	Material/Features
Abrasive Stones	The cutting medium that refines the bore surface.	Resin-bonded diamond or CBN; grit sizes typically 120–800# for finishing. The yellow color indicates a resin bond for high surface quality.
Mandrel Body	Supports the abrasive stones and transmits expansion force.	High-strength alloy steel (42CrMo), heat-treated for rigidity and fatigue resistance.
Expansion Mechanism	Controls radial expansion of the stones; may be mechanical, hydraulic, or pneumatic.	Precision-ground tapered sleeve or wedge block for smooth, repeatable expansion.
Drive Shank	Connects the tool to the honing machine spindle.	Alloy steel, with a precision-fit interface (e.g., Morse taper or cylindrical shank) to ensure concentricity.

Technical Parameters (Based on the Model Shown)

Parameter	Specification	Notes
Working Diameter Range	30–35 mm	As marked on the tool body: “珩磨头 – 30-35”.
Abrasive Stone Size	Typically 10–15 mm width, 5–8 mm thickness	Customizable based on hole depth and material.
Expansion Stroke	2–5 mm	Determines the maximum diameter adjustment.
Recommended Surface Finish	Ra 0.1–0.8 μm	Achievable with fine-grit abrasives.
Honing Speed	30–80 m/min (circumferential), 10–30 m/min (reciprocating)	Adjust based on workpiece material and desired finish.
Coolant	Water-soluble emulsion or neat oil	Essential for chip evacuation and heat dissipation.

Application Scenarios & Selection Guide

Primary Applications:
- Hydraulic cylinder bores, fuel injector nozzles, and gun barrels requiring mirror finishes.
- Mold guide pins and precision bearing holes needing tight tolerance (IT6–IT7).
- Deep holes in stainless steel, titanium, and heat-resistant alloys where conventional reaming is ineffective.
Selection Criteria:
- Abrasive Type: Diamond for hard materials (≥ HRC 45), CBN for ferrous metals, and silicon carbide for general-purpose use.
- Grit Size: 120–240# for rough honing, 320–600# for semi-finishing, 800# and above for super-finishing.
- Stone Bond: Resin bond for heat-sensitive materials, metal bond for heavy stock removal.

Advantages & Maintenance

Core Advantages:
- Delivers superior surface finish and dimensional accuracy compared to reaming or grinding.
- Self-compensates for minor tool deflection, ensuring straightness in deep holes.
- Modular design allows quick replacement of abrasive stones, reducing downtime.
Maintenance Tips:
- Clean the expansion mechanism and abrasive stones after each use to prevent clogging.
- Inspect stone wear regularly; replace when stones are worn to 70% of their original height.
- Use filtered coolant (≤ 10 μm) to avoid scratching the workpiece surface.

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Products

The Ultimate Guide to Different Drill Bit Types: How to Choose the Right Tool for the Job

Dezhou Drillstar Cutting Tool Co., Ltd. officially resumed production amidst a festive and auspicious atmosphere.

Dezhou Drillstar Cutting Tool Co., Ltd. 2026 Year of the Horse Gala: A Resounding Success – Forging Precision, Riding the Wind of Progress

Deep Hole Honing Tool

Description

marker

Core Function & Working Principle

Key Structure & Materials

Technical Parameters (Based on the Model Shown)

Application Scenarios & Selection Guide

Advantages & Maintenance

Contact us

* Name

*Email

Phone / WhatsAPP / WeChat

* What I have to say.

Related Popular Products

Cobalt-Based Superalloy

Valve Internals Series

QUICK TURN 150L Second-hand Machine Tool

Stellite Valve Sleeve

Stellite Alloy Water Nozzle

Rhombic CNC inserts

Cemented Carbide Wear-Resistant Bushing

Turbine Blade Protection Plate

Hardened Metal Ground Cylinder

Stellite Rotor for Petroleum Equipment

Stellite Alloy Valve Probe for the Petrochemical Industry

Carbide Drills

Star-shaped Grooving Cutters

Stellite Alloy Powder

Tungsten Carbide Composite Rod

Grooving inserts

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