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Reaming

Product catalog summary

Overview
Shefcut® precision reamers and boring tools are designed for creating accurately sized, straight, and round bores with excellent surface finishes. These tools feature a single, replaceable cutting blade supported by multiple guide pads, ensuring superior size control, surface finish quality, and hole geometry compared to conventional tools.

The Shefcut® Design Concept
The design separates the cutting, guiding, and supporting functions, allowing micro-adjustments for consistent accuracy. Guide pads provide rigid support, optimizing performance and resulting in superior bore geometry and fine surface finishes, with tolerances typically within 5 microns.

Precision Reaming and Boring Solutions
Shefcut tools are used in precision reaming and boring applications, with specific designs for each. Reaming tools operate at lower speeds and align with the bore, while boring tools operate at higher speeds for accurate bore location, ensuring minimal part-to-part variation.

Tool Designs and Applications
Shefcut tools are customizable for various applications, including multi-feature bores and specialized machining setups. Applications include tools for connecting rods, valve seats, and shift bar housings, tailored to specific material and machining requirements.

Applications Machining Data
Detailed machining data is provided for various applications, including component type, material, machine type, spindle speed, feed rate, cycle time, coolant type, size achieved, and finish achieved, aiding in tool and setup selection for specific manufacturing needs.

Conclusion
Shefcut tools offer advanced solutions for precision reaming and boring, with customizable designs to meet diverse industrial requirements, ensuring superior performance in high-precision manufacturing environments.

Technical Specifications

Application 13: Axle flange made from gray cast iron, processed on a lathe at 2000 RPM, feed rate of 0.18mm/rev, cycle time of 10 seconds, using semi-synthetic coolant at 5%, achieving a size of 0.003mm with a surface finish of 0.7 micrometers Ra.
Shefcut World Reamer® Series: Precision reaming tools with a rigid blade-clamping system for maximum chip clearance, available for metric and inch hole sizes, with options for internal or external coolant supply.

Tool Specifications
Tools are available in various sizes with specific blade and clamp screw requirements. Blade part numbers indicate properties such as angle, size, length, cutting lead, radial rake, and coating.

Blade Options & Cutting Lead Geometries
Standard cutting leads (C3.0, C1.3, C0.6) are suggested for different applications, with specific finishes attainable. Recommended machining allowance guidelines are provided for different reamer diameters and materials.

Tool Holders
Floating holders are designed to compensate for misalignment in turning applications, self-centering, and usable with or without internal coolant.

Key Recommendations
Ensure the blade lead matches the guide pads to avoid tool damage. Use appropriate cutting lead geometry based on material type and application requirements. Consider using PCD-tipped blades for enhanced performance on specific materials.

Adjustable Holders for Shefcut Tools
Adjustable holders allow precise axial and radial adjustments, achieving concentricity of 3 microns or less, recommended for boring holes with close tolerances and length-to-diameter ratios greater than 4:1.

Easy-True Adjustment Feature
The Easy-True design includes four cone-head torque screws for quick elimination of cutting edge run-out, ensuring concentricity when using Shefcut reamers in standard side-lock holders.

Setting Fixtures
Setting fixtures ensure secure and accurate tool settings, reducing downtime and minimizing blade breakage. Two designs are available: the World Reamer fixture for compact tools and the All-Purpose fixture for longer or larger diameter tools.

Blade Replacement and Adjustment
Shefcut blades are micro-adjustable for consistent cutting diameters. Proper adjustment ensures effective cutting and minimizes damage.

Coolant Usage
Coolant is crucial for performance, with recommendations varying by material type. Internal coolant is advised for specific conditions like deep blind bores or high-speed machining.

Operating Requirements
Accurate alignment of the machine spindle to the workpiece is essential. Power feed is necessary for consistent cutting pressure, and floating holders can correct misalignment.

Machining Guide
Guidelines for spindle speed and feed rate are provided for various materials, considering factors like blade lead and coolant type.

Tool Performance Guide
Shefcut tools produce precise holes with fine finishes, but variables like coolant, alignment, and blade adjustment affect performance. Tips for enhancing tool performance include checking alignment, adjusting run-out, and ensuring proper blade settings.

Tool Performance Guide
Corrective actions for various bore conditions are provided, including adjusting feed rates, varying cutting speeds, checking chip evacuation, increasing coolant lubricity, and inspecting blade wear.

Customer Information Form
This form collects essential customer and project details, ensuring the correct tool is provided for specific applications.

Application Data Sheet
The data sheet outlines the requirements for Shefcut® Precision Reaming & Boring Solutions, emphasizing the importance of detailed part prints or sketches.

Hole-Finishing Solutions
Cogsdill offers a range of hole-finishing solutions, including Shefcut® precision reaming and boring tools, rotary brazed diamond tools, and burnishing tools and machines.

Contact Information
Cogsdill-Nuneaton Ltd. provides contact details for customer service and encourages customers to reach out for custom tool design and worldwide service and support.

Catalog excerpts

2 THE SHEFCUT > ή DESIGN CONCEPT 6 PRECISION REAMING AND BORING SOLUTIONS 8 TOOLDESIGNS AND APPLICATIONS 22 SHEFCUT WORLD REAMER > SERIES 24 SHEFCUT > ή SH100 SERIES 25 SHEFCUT > SH400 SERIES 26 INTERPRETING SHEFCUT > ή BLADE PART NUMBERS 28 BLADE OPTIONS AND CUTTING LEAD GEOMETRIES 34 TOOLHOLDERS 38 SETTING FIXTURES 40 BLADE REPLACEMENT AND ADJUSTMENT 42 OPERATING REQUIREMENTS 44 MACHINING GUIDE FOR SHEFCUT REAMING 46 TOOLPERFORMANCE GUIDE 47 APPLICATION DATASHEET 48 HOLE-FINISHING SOLUTIONS FROM COGSDILL > Reaming COPYRIGHT2005 COGSDILLTOOLPRODUCTS, INC. > CATALOG NO. 600 UK 6-05 size="-1">

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Shefcutήprecision reamers and boring tools aredesigned to produce accurately sized, extremely straight and round bores with fine surface finishes. Multiple guide pads rigidly support a single, replaceable cutting blade for exceptional stabilityand alignment. Size control, surface finish quality,and hole geometry are superior, compared to results from conventional reamers and boring tools. Each tool is designed for a specific cut diameter.Standard and custom tool designs are offered. Alsoavailable from Cogsdill: tool holders designed tocomplement and enhance the performance of Shefcut tools, and...

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BLADELEAD BLADE CLAMP RAKEANGLE BLADE STOP PIN REAR ADJUSTING SCREW GUIDE PADS CLAMP SCREW FRONT ADJUSTING SCREW BLADE LEAD INADVANCE OFGUIDE PAD LEAD > FIGURE3

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The Shefcut > design concept > The Shefcut ή design concept can be adapted to a wide variety of standard and special tool configurations to suit your application. > 5 size="-2">

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Shefcut > ή tools are designed for precision reaming orboring operations.The manner in which the tools are appliedresults in some differences in tool design and machining set-up: > Shefcut tools are often used in precision reaming applications,where the tool is allowed to locate in the prepared bore.The Shefcut precision reamer is usually run at lower surface speeds,and is held directly in the spindle,in a floating tool holder or in a precision CNC holder.The tool body is necked downӔimmediately behind the cutting head for increased flexibility,since the tool will seek the bore until the guide...

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Shefcut tools are also designed and built for asingle,replaceable cutting blade supported by guide pads, providing exceptional stability and alignment for superior results. precision boring applications,where the tool is used for accurate bore location.The Shefcut precision boring tool is usually run at higher spindle speeds in a rigid machining set-up,and can often be applied directly to a cast bore.The tool is held with a highly accurate spindle connection (e.g.,HSK),or in an adjustable tool holder.The precision boring tool is designed for enhanced rigidity for very accurate bore location.Regardless...

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A few examples illustratingour special tool design capabilities and applications follow. The Shefcutή design concept is tailored to suit a wide variety of applications,including tools for multiple or step diameters,short or extended work lengths, extended pad lengths,front pilots,or special shanks,and tools for use in applications where unique machining set-up requirements exist.Cogsdill offers custom tool design and applications engineering assistance. NOTE: A completed Application Data Sheet (see page 43) should be enclosed with your request for quotation, along with your part print. > Shefcut...

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Shefcut > tool designs and applications > Custom tool designs to suit the application 10 size="-1">

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Shefcut > tool designs and applications > Combination tool design with Shefcut and brazed diamond tooling 11 size="-1">

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12.710 mm [0.5004 in] CUT DIA 12.703 mm [0.5001 in] PAD DIA > COOLANT θ50.00 mmABS MODULAR SYSTEM [LICENSE KOMET]ABS-50 [1.969 in] 63.50 mm [2.500 in]40.094 mm [1.5785 in] CUT DIA 63.50 mm [2.500 in] ABS MODULAR SYSTEM [LICENSE KOMET]ABS-50 40.086 mm [1.5782 in] PAD DIA > COOLANT 50.00 mm [1.969 in] >

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Shefcut > tool designs and applications >

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30.002 mm [1.1812 in] PAD DIA30.010 mm [1.1815 in] CUT DIA ABS-50ABS MODULAR SYSTEM [LICENSE KOMET] > COOLANT COOLANT 114.00 mm [4.488 in] 190.00 mm [7.480 in] θ37.59 mm [1.480 in] > 20.345 mm [0.8010 in] CUT DIA20.338 mm [0.8007 in] PAD DIA[PCD TIPPED BLADE] 40.00 mm [1.575 in] > COOLANT 81.10 mm[3.193 in] DIN.69893HSK.40 FORM.C 122.00mm[4.803 in] 70.31 mm[2.768 in] >

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Shefcut > tool designs and applications > Application 5 > file: app-5 AUTOMOTIVE CYLINDER HEAD CAM SHAFT BORES AUTOMOTIVE 4 CYCLE ENGINECYLINDER HEAD CAMSHAFT BEARING JOURNALS FINISH TOOL TO FINISH BORE JOURNALS 2, 3, 4, 5, AND 6PILOT TOOL TO FINISH BOREJOURNAL NUMBER 1MACHINESPINDLE 16.012 mm [0.6304 in] CUT DIA16.004 mm [0.6301 in] PAD DIAPCD TIPPED BLADE 16.009 mm [0.6303 in] CUT DIA16.001 mm [0.6300 in] PAD DIAPCD TIPPED BLADE θ16.000 mm 16.018 mm0.6299 in0.6306 inJOURNAL SPECIFICATION 500.00 mm[19.685 in] 100.00 mm[3.937 in] REFER TO APPLICATIONS MACHINING DATA, PAGE 21. 15 size="-1">

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Shefcut > tool designs and applications > Application 6 > file: app-6 AUTOMOTIVE CYLINDER HEAD CAM SHAFT BORES 27.000 mm [1.0630 in] CUT DIAMETER26.993 mm [1.0627 in] PAD DIAMETER 623.00 mm[24.528 in] COOLANT CAMSHAFT BEARINGJOURNALS MACHINE GUIDE BUSHINGEPB #2SPINDLE CONNECTION COOLANT REFER TO APPLICATIONS MACHINING DATA, PAGE 21. 16 size="-1">

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Shefcut > tool designs and applications > Application 7 > CLUTCH HOUSING file: app-7 COOLANT SUPPLIEDTO EACH GUIDEHSK.100 FORM.AADJUSTABLE HOLDER 148.491 mm [5.8461 in] CUT DIA148.478 mm [5.8456 in] PAD DIA 70.00 mm[2.756 in]108.00 mm[4.252 in] COOLANT REFER TO APPLICATIONS MACHINING DATA, PAGE 21. 17 size="-1">

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CAT.50 ADJUSTABLE HOLDERCHAMFERCARTRIDGE 60.33 mm[2.375 in] > COOLANT COOLANT COOLANT 123.80 mm[4.874 in] 112.09 mm[4.413 in] 19.101 mm [0.7520 in] CUT DIA19.093 mm [0.7517 in] PAD DIA 152.40 mm[6.000 in] >

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Shefcut > tool designs and applications > Application 10 > file: app-10 PISTON WRIST PIN BORE AIRCRAFT FABRICATION CAT.50 ADJUSTABLE HOLDERABS.50ABS MODULAR SYSTEM [LICENSE KOMET] 95.25 mm[3.750 in]190.50 mm[7.500 in]68.014 mm [2.6777 in] CUT DIA68.006 mm [2.6774 in] PAD DIA COOLANT file: app-11 Application 11 > PILOT WITH SPIRAL GROOVESFOR DEBRIS REMOVALGUIDE BUSHING INPART FIXTUREFABRICATED PARTBEING REAMED27.081 mm [1.0662 in] CUT DIA27.069 mm [1.0657 in] PAD DIA 227.08 mm[8.940 in]393.70 mm[15.500 in]PART FIXTURE BASEWITH PILOT BUSHING REFER TO APPLICATIONS MACHINING DATA, PAGE 21. 19 size="-1">...

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Reaming

Reaming

Catalog excerpts

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