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SIT Società Italiana Tecnospazzole
Precision Machining Catalogue

Precision Machining Catalogue

Product catalog summary

Overview: The document serves as a comprehensive guide for selecting industrial brushes for precision machining applications, emphasizing the importance of choosing the right brush to achieve efficient and cost-effective surface finishes.

Main Sections:

Choosing the Right Brush: This section discusses the factors influencing brush selection, noting that no single brush is perfect for all applications. The selection depends on specific surface finishing requirements, with eight variables identified by SIT Tecnospazzole that determine brush performance.
Brush Types and Materials: Brushes are categorized by filament materials, including synthetic, abrasive synthetic, ferrous and non-ferrous metals, and natural fibers. Each material's properties and suitable applications, such as resistance to chemicals, temperature, and abrasion, are described.
Application Guidelines: A table provides guidance on the suitability of different brush materials for various materials like aluminum, brass, and cast iron, categorizing applications into best fit, admissible solution, and non-recommended uses.
Operational Parameters: The document explains the impact of power, speed, and pressure on brush performance, emphasizing that brushes work by cutting rather than abrasion to reduce surface damage.

Key Recommendations:

Consider power source characteristics when selecting a brush, as they affect the surface finish.
Understand that brushes are impact tools that remove surface adherence delicately compared to abrasive tools.
Evaluate operational quality and efficiency of the surface finish, as they may not always align.

Material Specifications and Properties: Detailed specifications for materials like Polypropylene, Nylon, and metals such as Steel and Brass are provided, outlining key properties like specific weight, water absorption, and resistance to various conditions.

Best Practices for Surface Finishing: Light pressure during brushing is recommended to ensure only the filament tips contact the surface, achieving precise impact and quick material removal without damage. Recommended working interference is 2-3% of the radius with pressures around 0.2 - 0.5 MPa.

Peripheral Speed Recommendations: Proper peripheral speed is crucial to avoid damage to filament properties, with tables provided for recommended speeds for metallic and synthetic filament brushes.

Deburring and Surface Finishing: Brushes are used for deburring and polishing to improve surface characteristics, with parameters like Ra and Rz being critical for desired surface roughness.

Advantages of Brush Deburring: Brush deburring is cost-effective, suitable for various geometries and materials, requires low pressure, is easy to automate, and accommodates setup inaccuracies.

Functional Improvements through Brushing: Brushing improves friction coefficient, bearing capacity, fatigue resistance, and lubrication, enhancing surface functionality and lubricant retention.

Specifications and Applications: Detailed specifications for wheel and disc brushes, including dimensions, recommended RPM, and motor sizes, are provided. Metal adapters for mounting brushes on smaller shafts and new adapters for CNC machines are introduced.

Operating Procedures: Optimal operating speeds for abrasive nylon disc brushes are outlined, recommending lower speeds for better performance and the use of coolant for high-speed applications.

Brush Path and Penetration: Guidelines for brush path and penetration are provided to maximize brush life and performance, recommending changing rotational direction after the initial pass to remove burrs effectively.

Deburring on CNC Machines: Automated deburring improves process efficiency and quality, with methods for compensating filament wear such as automatic indexing and amperage metering described.

Abrasive Filaments: Various abrasive filaments, including silicon carbide, aluminum oxide, and diamond, are detailed. High-temperature resistant filaments HT150 and AbraMaXX offer superior performance and can replace stainless steel wire brushes in some applications.

Recommendations: Maintain recommended speeds and penetration rates, use coolant when necessary, and adjust for filament wear. Choose the appropriate abrasive filament based on material and application requirements.

Brushing Effectiveness: Effectiveness depends on speed, pressure, density, and filament type. Grits 120 and 180 are commonly used for initial surface treatment, with adjustments based on the desired finish.

Applications and Procedures: Recommendations for using abrasive nylon brushes emphasize lower speed and pressure compared to metallic brushes, with optimal rotation speeds, pressure settings, and coolant use outlined for heavy-duty applications.

Aluminium Alloys Treatment: SIT offers a product line for aluminium alloys, covering the entire manufacturing process from cleaning moulds to satin finishing, with specific brushes recommended for different stages.

Technical Considerations: Technical specifications for composite disc brushes highlight their robustness and efficiency, with guidelines for use in CNC and other automated systems provided.

Conclusion: SIT provides comprehensive solutions for brushing and finishing applications across various materials, emphasizing the importance of selecting the appropriate filament type and operational settings to optimize results.

Materials and Types of Brushes: Various materials are used for twisted-in brushes, including steel, brass-coated steel, stainless steel, brass, abrasive nylon, and non-abrasive nylon. Abrasive nylon filaments include Aluminium Oxide, Silicon Carbide, and ceramic abrasive grit.

Packaging Information: Brushes are available in multiple pack sizes, such as 10 pieces with secondary packaging of 100 pieces, or blister packs of 6 pieces with secondary packaging of 48 pieces.

Precision Machining Applications: Twisted-in brushes are used for deburring and finishing inside tubular components, drilled, or tapered holes, with different types available for specific applications.

Technical Specifications: Brushes come in various diameters and are fitted with solid galvanized steel shanks for use on CNC machines, drill presses, and manual tools, with recommended rotation speeds detailed.

Applications and Use: Brushes are used for removing drilling residues, deburring crosswise holes, and cleaning cavities and hard-to-reach surfaces, with manual twisted-in brushes available for cleaning pipes and other components.

Special Features: The LIZ brass-plated steel cord is noted for its high density, resistance, flexibility, and suitability for processing semi-soft materials like rubber.

Application Description: Specifications and requirements for industrial brushes, including operating temperature in Celsius and Fahrenheit, are outlined.

Order Information: Details on order or sample quantity and yearly potential, as well as pricing information if a competitor's brush is currently being used, are included.

Working Environment: Brushes are suitable for various environments such as dry, water, oil, base solution, acid solution, aerospace, and sports applications.

Design Specifications: Options for brush design include round, keyway, Turtlebore, diamond, and other configurations.

Company Information: SIT Società Italiana TecnospaZZole S.p.A. is the manufacturer, located in Bologna, Italy, with contact details provided. The company is ISO 9001 certified, indicating a quality management system in place.

Catalog excerpts

MECCANICA DI PRECISIONE PRECISION MACHINING

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MECCANICA DI PRECISIONE PRECISION MACHINING Indice / Index > LA SPAZZOLA GIUSTA PER OGNI OPERAZIONE HOW TO CHOOSE THE RIGHT BRUSH > SBAVATURA E FINITURA SUPERFICIALE DEBURRING AND SURFACE FINISHING > SPAZZOLE COMPOSITE E SBAVATURA AUTOMATIZZATA p. 14 COMPOSITE BRUSHES AND AUTOMATED DEBURRING > TRATTAMENTO LEGHE LEGGERE E APPLICAZIONI DEL NYLON ABRASIVO ALUMINIUM ALLOYS TREATMENT AND ABRASIVE NYLON APPLICATIONS > Spazzole Composite a disco Composite disc brushes > Spazzole circolari Wheel brushes > Anelli Single section wheels > Scovoli per sbavatura Twisted-in brushes for deburring > Spazzole...

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Circolare per pulire uno stampato in ghisa / Wheel brush for cast iron cleaning Spazzole in Tampico (fibra vegetale) per la pulizia degli ingranaggi in plastica / Tampico (plant fiber) brush for plastic gears ceaning Spazzola in filamento ceramico per sbavare ruote dentate / Ceramic brush for gear splines deburring Sbavare oggetti estrusi in alluminio / Deburring of extruded aluminium profiles Rifinire ingranaggi in leghe leggere / Light alloys finishing Scovoli per sbavare cerchioni in lega / Twisted-in brushes for wheel rims deburring Sbavare e rifinire componenti biomedicali in titanio / Deburring...

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LA SPAZZOLA GIUSTA PER OGNI OPERAZIONE HOW TO CHOOSE THE RIGHT BRUSH Esistono infinite applicazioni e modalità di utilizzo di una spazzola. Forse non esiste la spazzola “perfetta” per ogni applicazione, ma una corretta selezione delle variabili costruttive guida alla scelta della spazzola ideale per la propria specifica esigenza di finitura superficiale. There are endless applications and uses for industrial brushes. There may not be the “perfect” brush for each application but the proper selection of variables drives the choice in selecting the ideal brush for specific surface finishing requirements....

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LA SPAZZOLA GIUSTA PER OGNI OPERAZIONE HOW TO CHOOSE THE RIGHT BRUSH TIPOLOGIA / TYPE FILAMENTO FILLING MATERIAL Polipropilene - PP (PPL) Nylon - PA (NYL) 6/6.6 Sintetici Synthetic Nylon - PA (NYL) 46 Nylon - PA (NYL) 6 BILON PolyVinilChloride (PVC) PET - PBT Poliestere / Polyestere Nylon abrasivo / Abrasive Nylon Sintetici abrasivi Abrasive synthetic Carburo di Silicio / Silicon carbide Ossido o Silicato di Alluminio / Alluminium oxide Ceramico Diamantato Metallici ferrosi Ferrous metal Acciaio / Steel Acciaio Inossidabile (Inox) AISI 302-304-316 / Stainless Steel AISI 302-304-316 Metallici...

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LA SPAZZOLA GIUSTA PER OGNI OPERAZIONE HOW TO CHOOSE THE RIGHT BRUSH Quale filamento scegliere? / How to choose the filament? ALLUMINIO ALUMINIUM OTTONE BRASS GHISA COMPOSITO CAST IRON COMPOSITE RAME COPPER ACCIAIO STEEL VETRO GLASS METALLI DURI HARD METAL CARBIDES PLASTICA PLASTIC Irruvidire, Rusticare Roughening, Aging GOMMA RUBBER ACCIAIO STEEL Raspare Buffing Rimuovere rivestimenti, Preparare/Pulire saldature, Sbavare Coating removal, Weld preparation / cleaning, Deburring ACCIAIO INOX STAINLESS STEEL PIETRA, MATTONI STONE, BRICK OTTONE BRASS LEGNO WOOD Rusticare, Rimuovere rivestimenti Aging,...

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LA SPAZZOLA GIUSTA PER OGNI OPERAZIONE HOW TO CHOOSE THE RIGHT BRUSH Peso Assorbimento specifico acqua Specific Water weight absorption 3 g/cm % Materiale / Material Polypropylene - PP (o PPL) 0,91 Nylon - PA (NYL) 6 1,12 Nylon - PA (NYL) 6.6 1,14 Nylon - PA (NYL) 6.12/6.10 1,08 Nylon - PA (NYL) 46 1,18 Nylon - PA (NYL) HT150 1,09 Nylon - PA (NYL) 6 BILON 1,12 Nylon abrasivo / Abrasive Nylon - PA6 ~1,25* Nylon abrasivo / Abrasive Nylon - PA6.12/6.10 ~1,25* Nylon abrasivo / Abrasive Nylon - AbraMaXX ~1,25* Polyphenylene sulfide - (PPS) Pekalon II 1,35 Polyetheretherketone - PEEK 1,30 PolyVinilChloride...

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LA SPAZZOLA GIUSTA PER OGNI OPERAZIONE HOW TO CHOOSE THE RIGHT BRUSH Seguire poche buone pratiche può aiutare a Following few best practices will help obconiugare qualità della finitura superficiale e taining the desired surface finish whilst vita utile della spazzola achieving lifetime durability PRIMA REGOLA: lavorare con pressione leggera, in modo che solo le punte dei fili vengano a contatto con la superficie di lavoro: esercitando il massimo urto, asportando le asperità velocemente e senza spezzarsi. Nella maggior parte dei casi, il corretto meccanismo d’asportazione si ottiene se non si...

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LA SPAZZOLA GIUSTA PER OGNI OPERAZIONE HOW TO CHOOSE THE RIGHT BRUSH Identificata la velocità periferica, si possono scegliere, come riportato nel passo 3, il diametro e la velocità di rotazione compatibili. Si riporta di seguito la formula, con tabella dei risultati, per risalire, nota la velocità lineare periferica desiderata, alla velocità di rotazione della spazzola e il suo diametro ottimali. Once the peripheral speed is identified, as explained in Step 3, we should choose compatible diameter and angular velocity dictated by the available tool. Below the table to match the desired peripheral...

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SBAVATURA E FINITURA SUPERFICIALE DEBURRING AND SURFACE FINISHING Nella meccanica di precisione l’obiettivo è quello di ottenere una finitura / texture superficiale desiderata, più specificamente una rugosità superficiale (misura delle irregolarità della superficie) che ha un impatto critico a livello funzionale ed estetico. In precision machining the goal is to obtain a desired finish or texture. More specifically a surface roughness (measure of the total spaced surface irregularities) because of the improved functional an aesthetic impact. Nella norma ISO 4287:1997 sono definiti i valori della...

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SBAVATURA E FINITURA SUPERFICIALE DEBURRING AND SURFACE FINISHING Qualunque sia il processo di lavorazione, la finitura mediante spazzolatura abrasiva migliora le caratteristiche funzionali delle parti nel rispetto del profilo e delle geometrie. Infatti la spazzola funziona per “erosione abrasiva” della superficie. Ad esempio filamenti abrasivi sottili “accarezzano” la superfice e lavorano sulle tracce lasciate dalla lavorazione precedente (senza penetrazione nel materiale). A seconda della qualità della lavorazione (Ra(rettifica) < Ra(fresatura)), la dimensione della grana abrasiva impregnata...

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Precision Machining Catalogue

Precision Machining Catalogue

Catalog excerpts

All SIT Società Italiana Tecnospazzole catalogs and technical brochures