Product Positioning

Flap Discs Built for Heavy Stock Removal and Long-Duty Cycles

Large heavy-duty flap discs are positioned for maximum stock removal, long service life, and stable performance in high-load grinding—where weld reinforcement is large, material is hard, cycle times are long, or continuous production is required.
They are not merely larger standard discs; they are reinforced for heavy-duty operation through stronger backing, higher flap density, improved heat management, and upgraded bonding systems.

 

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Technical Specifications

Built for High Load and Industrial Standards

Item	Specification
Product Type	Large heavy-duty flap discs
Abrasives	AO / Zirconia / Ceramic options
Shape	Type 27(Flat)  / Type 29 (Common)
Outer Diameter	6″ / 7″ (Extendable)
Mounting	Arbor hole / Threaded hub (Optional)
Grit Range	P24 – P80 (Extendable)
Backing Plate	Reinforced fiberglass / Metal backing
Max RPM	Marked per size & Standard

 

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Processing Logic

Large Contact + Dense Flaps + Heat Control Drives Heavy Grinding

Heavy-duty flap discs must balance speed and stability:

• Large diameter increases surface speed and effective contact arc;
• High flap density ensures continuous cutting and reduced chatter;
• Improved heat dissipation reduces heat concentration and bonding degradation;maintaining stable removal rates over long duty cycles.

 

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Backing Structure & Performance Limits

More Tolerant, Still Requires Correct Limits

• Strengths: higher pressure tolerance, better heat resistance, longer life and consistency
• Limits: larger diameter increases kinetic energy—strict speed rating and guarding are mandatory

Avoid aggressive grinding on thin sheet or cosmetic surfaces to prevent gouging and distortion

 

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Machine Compatibility & Operating Conditions

Large Angle Grinders for High-Load Grinding

• Machines: high-power angle grinders (commonly 7″/180mm class)
• Recommended conditions: stable working angle, steady feed, staged cooling
• Must match: diameter/arbor or thread system; grinder RPM ≤ disc max RPM (never overspeed)

 

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Engineering Comparison

Heavy-Duty vs Standard: Throughput, Life and Safety Envelope

Comparison	Large Heavy-duty Flap Discs	Standard Flap Discs (4″–5″)
Removal rate	★★★★★	★★★★
Long-duty stability	★★★★★	★★★
Heat management	★★★★★	★★★
Life consistency	★★★★★	★★★★
Safety requirement	Higher	Standard
Typical use	heavy grinding, long welds, hard materials	general grinding & blending

 

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Typical Applications & Industries

Heavy Fabrication, Structural Steel and High-Throughput Grinding

• Weld reinforcement removal for structural steel and heavy weldments
• Thick plate chamfering and bevel preparation
• Shipbuilding, construction machinery, pressure vessels and heavy industry
• High-load grinding on high-strength steels (abrasive system dependent)

 

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Grit Range & Recommended Use

Heavy Grinding Grit Strategy

Typical recommendation

• P24–P36: extreme heavy grinding and large weld removal
• P40: general heavy grinding
• P60: removal + blending (common transition grit)
• P80: weld dressing and surface blending (less common for primary heavy grinding)

 

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OEM & ODM Capability

Heavy-Duty Structure Customization

OEM/ODM supported: diameter and arbor/thread standards, Type 27/29, abrasive system and formulation, flap density & layup angle, backing material/thickness, heat-resistant bonding solutions, private labeling/packaging and carton programs—engineered for heavy-industry demands on life, productivity, and consistency.

 

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Why Choose Us

Heavy-Duty Performance Depends on Structure and Heat Management

Real heavy-duty performance is structural engineering: backing rigidity determines angle stability; flap density and layup angle drive cutting continuity; bonding and heat behavior define the wear curve. We control structure and process for batch stability, delivering repeatable heavy-grinding productivity and life.

 

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Usage & Storage Recommendations

Safety and Life Require Controlled Technique

• Never overspeed: grinder RPM must be ≤ disc max RPM; guards and PPE are mandatory
• Maintain a stable angle; avoid dwelling under high pressure to reduce overheating/gouging
• For heavy grinding, work in stages with cooling intervals to reduce discoloration and bond degradation
• Store dry and shaded; avoid moisture and heavy compression; reseal after opening