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VHT Modular and Mandrel Honing Stones

VHT Modular and Mandrel Honing Stones

Product catalog summary

Overview: The document provides comprehensive information on replacement abrasives and oils for honing equipment, specifically focusing on the VHT Modular Series and Mandrel Honing Stones. It includes specifications for various abrasive types, grit sizes, and hardness levels, along with recommendations for different material types.

Abrasive Specifications: The document details hardness levels (Soft, Standard, Hard, Hardest) and corresponding codes for OTW and Sunnen brands. It covers series and abrasive types, including Silicon Carbide, Aluminum Oxide, and Resin, with standard grit sizes ranging from 80 to 400.

Material-Specific Recommendations: Recommendations are provided for fast stock removal and fine finishing in materials such as Aluminum, Cast Iron, and Steel, with specific abrasive specifications and approximate finish Ra values.

Mandrel and Superabrasives: The use of CBN (Borazon) and Diamond abrasives is described, with standard grit sizes and hardness levels. A conversion guide for stone codes between OTW and Sunnen is included.

Honing Fluids: OTW offers specialty honing lubricants like OTW-8915 and OTW-8920, designed to optimize honing operations by cooling, flushing, and improving material removal rates.

Honing Machines: Various horizontal and vertical honing machines are listed, detailing their bore diameter ranges and duty levels, from light to heavy-duty applications.

Tooling and Accessories: Information on complete tooling assemblies, VHT expandable tooling systems, and components like adjusting hone heads and drive adaptors is provided.

Troubleshooting: Common honing issues such as tapered bores, barrel bores, and waviness are addressed with potential causes and solutions.

Troubleshooting Honing Issues:

1. Bellmouth Bore: Caused by a mandrel that is not true, a short or unbalanced part, improper stone, or improper stone length. Solutions include truing stones and guides, shortening stroke length, using a softer stone, and shortening the stone and guides equally to 1-1/2 times the bore length.

2. Out-of-Round Bore: Causes include an undersized honing tool, a mandrel that is not true, workpiece flexing or deformation, and improper stone. Solutions involve changing the honing tool, truing stones and guides, decreasing cutting pressure, and using a softer stone.

3. Stone Not Cutting: Occurs due to stone glazing or loading. Solutions include dressing the stone, increasing cutting pressure and stroking speed, using a softer or coarser stone, and checking the coolant.

4. Slow Stock Removal: Caused by improper spindle speed, inadequate stone feed, improper stone, and improper or diluted coolant. Solutions are to increase spindle speed, increase cutting pressure, use a softer or coarser stone, and check the coolant.

5. Poor Stone Life: Excessive stone feed, inadequate spindle speed, improper stone, and improper or diluted coolant can lead to this issue. Solutions include decreasing cutting pressure, increasing spindle speed, using a harder stone, using coarser grit, and checking the coolant.

6. Rough Finish: Caused by improper feed, a mandrel that is not true, improper stone choice, improper or contaminated coolant, and soft or exotic workpiece material. Solutions involve decreasing cutting pressure, truing stones and guides to the exact hole diameter, using a finer stone, checking the coolant, and using bronze mandrel/guide shoes.

7. Scratches in Bore: Causes include improper feed, improper stone, improper tool, and improper or contaminated coolant. Solutions are to decrease cutting pressure, use a finer or softer stone, use a softer mandrel, and check the coolant.

Note: Improper or contaminated coolant is a common cause of many honing problems, such as poor abrasive life, poor cutting, rough surface finish, and excessive heat buildup. Coolant contamination can occur from water, hydraulic oil, coolant from previous operations, and tramp oil/rust preventatives. For questions about coolant condition or application, contact Ohio Tool Works.

Ohio Tool Works Overview: With over 100 years of honing industry experience, Ohio Tool Works provides both standard and custom replacement abrasives for tooling from various manufacturers, including Sunnen, General Hone, Barnes, Micromatic, Century, Nagel, Delapena, Gehring, Superior, and others.

Catalog excerpts

VHT MODULAR SERIES AND MANDREL HONING STONES Replacement Abrasives and Oils for All Major Brands of Honing Equipment

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11% more usable abrasive & sulfur filled Sunnen Stone Code: H70A45 Abrasive Grit Size * “OH - Series” Abrasives OTW Sunnen Abrasive Hardness Abrasive Grit Size* * Standard grit sizes above. Others are available Abrasive Type Recommended Abrasive Selection by Material Type Fast Stock Removal Fine Finishing in Drilled, Bored, or Ground Bores Typically in Previously Honed Bores Replacement Abrasives Catalog | 2

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Up to 50% more usable abrasive Sunnen Stone Code: H70NM55 * OTW Stone Code: SH703-B 76-M Y Abrasive Type Abrasive Grit Size Hardness Abrasive Hardness Standard Hard Abrasive Grit Size* * Standard grit sizes above. Others are available Abrasive Type Sunnen NM DM Recommended Abrasive Selection by Material Type Fast Stock Removal Fine Finishing in Drilled, Bored, or Ground BoresTypically in Previously Honed Bores 3 | Replacement Abrasives Catalog

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Bore Size- Inch (mm Metal Bond Mandrel Abrasives Bore Size- Inch (mm Bore Size- Inch (mm Recommended Abrasive Selection by Material Type Fast Stock Removal in Drilled, Bored, or Ground Bores Fine Finishing Typically in Previously Honed Bores (419)281-3700 Replacement Abrasives Catalog | 4

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OTW Stone Code: SK12-B-76 M Abrasive Type V Abrasive Grit Size Abrasive Hardness OTW Sunnen Abrasive Grit Size Diamond D DM Grit Size OTW Sunnen Stone Inserted Super Mandrels These mandrels are for applications where a long lasting mandrel is desired. The advantages of using these super mandrels compared to standard mandrels: 1. Consist size, geometry, and finish of the workpiece. 2. Reduced setup time due to the fact of the mandrels long life compared to standard mandrels. For Special Abrasives Needs or Application Assistance Contact Us at (419)281-3700 or [email protected] 5 | Replacement...

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Sunnen Stone Code: W47A45 Abrasive Grit Size Hardness Abrasive Hardness “Portable” Abrasives Abrasive Grit Size* * Standard grit sizes above. Others are available Abrasive Type Silicon Carbide Aluminum Oxide OTW J A Sunnen J A Series (Diameter Range) (419)281-3700 Replacement Abrasives Catalog | 6

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Sunnen Stone Code: W47NM55 OTW Stone Code: OH-W470 - B 76 M _ I V ^ Abrasive Hardness Standard Hard Abrasive Grit Size* * Standard grit sizes above. Others are available Abrasive Type Sunnen NM DM Series (Diameter Range) For Special Abrasives Needs or Application Assistance Contact Us at (419)281-3700 or [email protected] 7 | Replacement Abrasives Catalog

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Fast stock Removalin Drilled, Bored or Ground Bores 2.5" - 2.7" 64-69 mm Aluminum OH-G250-J450 Brass OH-G250-J450 OH-G250-J450 OH-G250-J450 Steel Soft < 50 HRC OH-G250-A450 Steel Hard > 50 HRC OH-G250-A430 “Portable” Selection Guide Fine FinishingTypically in Previously Honed Bores 2.5" - 2.7" 2.7" - 4.1" 3.5" - 5.5" Inch Metric Fast stock Removalin Drilled, Bored or Ground Bores 2.7" - 4.1" 69-104 mm Fine Finishing Typically in Previously Honed Bores 50 20 80 40 40 25 Replacement Abrasives Catalog | 8

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AccessoriesRemote Feed Adjusting Head Item Description Part Number 1 THREADED FEED CLUTCH ASSEMBLY 16709 2 FLANGED FEED CLUTCH ASSEMBLY 16682 9 | Replacement Abrasives Catalog

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VHT Modular and Mandrel Honing Stones-10

VHT-500 Hone Head Module includes: Hone Body External Spline Eccentric Drive Shank, Drive Assembly Rack Assembly - Stone Rack Assembly - Stone Rack Assembly - Stone 3.50-7.00" VHT-700 Hone Head Module (13901) VHT-700 Hone Head Module includes: Body (Assembly)* Shank, Drive Assembly Rack Assembly - Stone Rack Assembly - Guide Rack Assembly - Guide Rack Assembly - Stone Rack Assembly - Stone Rack Assembly - Guide " VHT-800 Hone Head Expansion Module (14020) i°-9.°° VHT-800 Hone Head Expansion Module includes: Cage Assembly Rack Assembly - Stone Rack Assembly - Guide Also Required For Use (sold...

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VHT Modular and Mandrel Honing Stones-11

System Overview 11.0-15.00" VHT-830 Hone Head Expansion Module (14063) VHT-830 Hone Head Expansion Module includes: 14107 Cage Assembly 14815 Rack Assembly - Stone 14816 Rack Assembly - Guide Also Required For Use (sold separately): 14904 Body (Assembly)* 13938 Shank, Drive Assembly** 14.0-18.00" VHT-840 Hone Head Expansion Module (13942) VHT-840 Hone Head Expansion Module includes: 13934 Cage Assembly 14817 Rack Assembly - Stone 14818 Rack Assembly - Guide Also Required For Use (sold separately): 14904 Body (Assembly)* 13938 Shank, Drive Assembly** 18.0-22.0" VHT-850 Hone Head Expansion Module...

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VHT Modular and Mandrel Honing Stones-12

Using the right honing oil is an essential part of bore sizing precision, finish and efficiency. OTW makes it easy with our specialty honing lubricants, which are specifically formulated and tested to cool, flush, and optimize your honing operation. OTW's proprietary cutting fluids help customers optimize their material removal rates, extend their abrasive and tooling life, and obtain superior bore finishes. OTW-8915 HONING OIL: OTW-8915 Honing Fluid is a premixed honing oil and is an excellent choice for most honing applications. Available in 5-gallon pails, 55-gallon drums and 275 gallon totes....

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VHT Modular and Mandrel Honing Stones-13

Honing Machines Model Bore Diameter Range (I.D.) Horizontal Honing Machines High Volume Production Bore Diameter Range (I.D.) Model OTW-VersaHone Vertical OTW-9000 Vertical Honing Machines OTW’s ever-growing lineup of horizontal and vertical honing machines is a result of the Company’s unmatched efforts to continuously develop and introduce breakthrough honing technology Offerings Complete Tooling Assemblies (Standard & Custom) VHT Expandable Tooling System Honing Tooling Products Tooling Components Description Light Duty – Ultra Heavy Duty Standard & Expandable Mandrels Single Stage – Multi-Stone...

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VHT Modular and Mandrel Honing Stones-14

Possible Cause(s] Tapered Bore 1. Mandrel not trued 2. Improper stroke length 3. Misalignment of fixture to spindle 1. True stones/mandrel 2. Extend stroke length on tight end(s) 3. Verify alignment 4. Reverse workpiece on mandrel Tapered Blind Bore 1. Improper stone length 2. Inadequate coolant flow 3. Insufficient relief ate blind end Honing Trouble Shooting Barrel Bore 1. Mandel not trued 2. Improper stone length 3. Improper stone Bowed Bore TZZZZZZZZIZZZ^ n7777777777Tzr.i Bellmouth Bore (> 2/3 stone length) Bellmouth Bore (< 2/3 stone length] (419)281-3700 1. Improper stone/tool length 1....

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VHT Modular and Mandrel Honing Stones

VHT Modular and Mandrel Honing Stones

Catalog excerpts

All Ohio Tool Works catalogs and technical brochures