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START HERE… How to use the Sunnen Honing Guide Use this Guide to choose the condition or application problem from this selection that most closely resembles the question(s) or problem(s) that you are experiencing and click your pointing device. You will be able to move or return to the previous section or another menu by clicking on the BLUE title of each section, Each page of the Guide can be turned forwards and backwards by clicking on the buttons located in the lower corners of the page. Click Here To Start Use this button to return to the Main Menu F Copyright Sunnen Products Company 2001 All Rights Reserved

SUNNEN HONING GUIDE Helpful Tips For Solving Bore Sizing And Finishing Problems Choose the honing condition, information about Sunnen honing stones, information about approximate surface finishes, or honing oils and coolants from the Main Menu that most closely resembles the problem(s)/question(s) that you are experiencing/have questions about. Click your pointing device. By clicking on the blue title of each section, you will be able to return to the previous section or menu. Each page of the Guide can be turned forwards and backwards by clicking on the buttons located in the lower corners...

Honing Condition Solutions ® Stone in Blind Hole Glazed ® Out-of-Round ® Stone Not Cutting ® Waviness Loaded ® Rainbow ® Poor Stone Life ® Finish Too Rough ® Bellmouth ® Random Scratches ® Barrel ® Taper in Open Bore ® Slow Stock Removal

Stone Not Cutting – Stone Glazed* Step 1 Sharpen A or J stone with MAN-700 diamond dresser; use LNB-700 Dressing stick on all other stones Increase cutting pressure Increase stroking speed Use softer stone (one with lower hardness number) Increase lubricity of honing fluid. Use recommended Sunnen Honing Oil/Coolant* * Many honing problems, such as poor cutting action, poor stone life, and rough finish, are caused by the wrong honing oil, insufficient honing oil, dirty honing oil, or contaminated honing oil. Use only clean, full-strength Sunnen Industrial Honing Oil. Make sure that the...

Stone Not Cutting – Stone Loaded* Step 1 Clean stones with LBN-700 dressing stick Increase stroking speed Use softer stone (one with lower stone number) Use coarser stone (one with lower grit number) Increase lubricity of honing fluid. Use recommended Sunnen Honing Oil/Coolant* * Many honing problems, such as poor cutting action, poor stone life, and rough finish, are caused by the wrong honing oil, insufficient honing oil, dirty honing oil, or contaminated honing oil. Use only clean, full-strength Sunnen Industrial Honing Oil. Make sure that the honing oil is neither diluted nor “cut” with...

Slow Stock Removal* Step 1 Increase spindle and stroke RPM Increase cutting pressure Use softer stone (one with lower stone hardness number) Use coarser grit stone (one with lower grit number) Increase lubricity of honing fluid. Use recommended Sunnen Honing Oil/Coolant* * Many honing problems, such as poor cutting action, poor stone life, and rough finish, are caused by the wrong honing oil, insufficient honing oil, dirty honing oil, or contaminated honing oil. Use only clean, full-strength Sunnen Industrial Honing Oil. Make sure that the honing oil is neither diluted nor “cut” with other...

Poor Stone Life* Step 1 Decrease cutting pressure Use faster spindle speed Use harder stone (one with higher hardness number) Use coarser grit stone (one with lower grit number) Increase lubricity of honing fluid. Use recommended Sunnen Honing Oil/Coolant* * Many honing problems, such as poor cutting action, poor stone life, and rough finish, are caused by the wrong honing oil, insufficient honing oil, dirty honing oil, or contaminated honing oil. Use only clean, full-strength Sunnen Industrial Honing Oil. Make sure that the honing oil is neither diluted nor “cut” with other oils. Keep...

True stone and shoes with truing sleeve – if workpiece is short or unbalanced, shorten stroke length If bore is LONGER than 2/3 stone length: shorten stone only (or row of stones) slightly on both ends If bore is SHORTER than 2/3 stone length: shorten STONES and SHOES equally to 1-1/2 times bore length If bellmouth persists, shorten stones more but do not shorten shoes any further CAUTION: OVER-CORRECTION of bellmouth will lead to barrel condition Step 5 Use softer stone (one with lower hardness number) Step 4

True stone and shoes with truing sleeve Use longer stone or shorten guide shoes on both ends CAUTION: OVER CORRECTION of barrel condition will lead to bellmouth Use mandrel with longer stone and shoe Use finer grit stone (one with higher grit number)

Taper In Open Bore Step 1 True stone and shoes with truing sleeve Change stroke to tight end of the bore is stroked off the stone further Reverse the workpiece on the mandrel more often If power stroking, make sure spindle and stroker are in alignment

Taper In Blind Bore Step 1 Shorten stone and shoe to about 2/3 length of bore – shorten stone more if taper persists True stone and shoes frequently with truing sleeve – shorten stroke area near blind end of hole If hole has insufficient or no relief at bottom, use hard tip stone Provide sufficient relief at bottom of hole Provide adequate oil flow at bottom of hole to wash chips out

Make sure honing tool is recommended size for diameter to be honed Thoroughly true stone and shoes to exact hole diameter If thin-wall part, decrease cutting pressure If stone stops cutting at decreased pressure, use stones with lower hardness number If power stroking, make sure spindle and stroker are in alignment

Use honing tool with sufficient stone length to bridge waviness (or lands and ports in bore)

Use L, BL, or multi-stone mandrel – stone length should be at least 1-1/2 times the length of the bore for best bow correction Use shorter stroke length (less overstroke) Use stone with lower hardness number to avoid part flexing