Use a Steel Boring Bar if you are reaching less than 4X Length to Diameter.  Use a Carbide Boring Bar is you are reaching between 4X to 8X Length to Diameter or if finish is critical. Also, if you have Coolant Thru use it whenever possible. Use Filters on Left to Narrow Down Boring Bar that is the Best Fit for Your Application.
73310155569 S10R-SDUCL-2
73310155569 S10R-SDUCL-2 $ 160.13 $ 200.16

55569 S10R-SDUCL-2. Pos 55° Diamond Boring Bar LH. Style U, Neg 3° DCMT 1/4 I.C.

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73310155583 S16T-SDUCL-4
73310155583 S16T-SDUCL-4 $ 270.50 $ 338.12

55583 S16T-SDUCL-4. Pos 55° Diamond Boring Bar LH. Style U, Neg 3° DC_T 1/2 I.C.

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73310155577 S16T-SDUCL-3
73310155577 S16T-SDUCL-3 $ 270.50 $ 338.12

55577 S16T-SDUCL-3. Pos 55° Diamond Boring Bar LH. Style U, Neg 3° DCMT 3/8 I.C.

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73310155576 S16T-SDUCR-3
73310155576 S16T-SDUCR-3 $ 270.50 $ 338.12

55576 S16T-SDUCR-3. Pos 55° Diamond Boring Bar RH. Style U, Neg 3° DCMT 3/8 I.C.

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73310155900 S08H-SWUCR-1.2-2
73310155900 S08H-SWUCR-1.2-2 $ 72.86 $ 91.07

55900 S08H-SWUCR-1.2-2. Mini Pos 80° Trigon BorBar RH. Style U, Neg 3° WCMT 5/32 I.C.

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73310155572 S12S-SDUCR-3
73310155572 S12S-SDUCR-3 $ 191.23 $ 239.04

55572 S12S-SDUCR-3. Pos 55° Diamond Boring Bar RH. Style U, Neg 3° DCMT 3/8 I.C.

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73310155904 S08H-SWUCR-1.2-4
73310155904 S08H-SWUCR-1.2-4 $ 72.86 $ 91.07

55904 S08H-SWUCR-1.2-4. Mini Pos 80° Trigon BorBar RH. Style U, Neg 3° WCMT 5/32 I.C.

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73310155921 S10R-SWUCL-2
73310155921 S10R-SWUCL-2 $ 130.59 $ 163.24

55921 S10R-SWUCL-2. Pos 80° Trigon Boring Bar LH. Style U, Neg 3° WCMT 1/4 I.C.

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73310155573 S12S-SDUCL-3
73310155573 S12S-SDUCL-3 $ 191.23 $ 239.04

55573 S12S-SDUCL-3. Pos 55° Diamond Boring Bar LH. Style U, Neg 3° DCMT 3/8 I.C.

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73310155917 S08M-SWUCL-2
73310155917 S08M-SWUCL-2 $ 110.39 $ 137.99

55917 S08M-SWUCL-2. Pos 80° Trigon Boring Bar LH. Style U, Neg 3° WCMT 1/4 I.C.

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73310155540 S06H-SDUCR-2
73310155540 S06H-SDUCR-2 $ 78.90 $ 98.62

55540 S06H-SDUCR-2. Mini Pos 55° Diamond BorBar RH. Style U, Neg 3° DCMT 1/4 I.C.

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73310155928 S10R-SWUCR-3
73310155928 S10R-SWUCR-3 $ 130.59 $ 163.24

55928 S10R-SWUCR-3. Pos 80° Trigon Boring Bar RH. Style U, Neg 3° WCMT 3/8 I.C.

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73310155948 S24U-SWUCR-4
73310155948 S24U-SWUCR-4 $ 292.26 $ 365.32

55948 S24U-SWUCR-4. Pos 80° Trigon Boring Bar RH. Style U, Neg 3° WCMT 1/2 I.C.

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73310155545 S08K-SDUCL-2
73310155545 S08K-SDUCL-2 $ 78.90 $ 98.62

55545 S08K-SDUCL-2. Mini Pos 55° Diamond BorBar LH. Style U, Neg 3° DCMT 1/4 I.C.

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73310155941 S16T-SWUCL-4
73310155941 S16T-SWUCL-4 $ 247.19 $ 308.99

55941 S16T-SWUCL-4. Pos 80° Trigon Boring Bar LH. Style U, Neg 3° WCMT 1/2 I.C.

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73310155548 S10M-SDUCR-2
73310155548 S10M-SDUCR-2 $ 105.70 $ 132.12

55548 S10M-SDUCR-2. Mini Pos 55° Diamond BorBar RH. Style U, Neg 3° DCMT 1/4 I.C.

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73310155940 S16T-SWUCR-4
73310155940 S16T-SWUCR-4 $ 247.19 $ 308.99

55940 S16T-SWUCR-4. Pos 80° Trigon Boring Bar RH. Style U, Neg 3° WCMT 1/2 I.C.

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73310155924 S08M-SWUCR-3
73310155924 S08M-SWUCR-3 $ 110.39 $ 137.99

55924 S08M-SWUCR-3. Pos 80° Trigon Boring Bar RH. Style U, Neg 3° WCMT 3/8 I.C.

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73310155925 S08M-SWUCL-3
73310155925 S08M-SWUCL-3 $ 110.39 $ 137.99

55925 S08M-SWUCL-3. Pos 80° Trigon Boring Bar LH. Style U, Neg 3° WCMT 3/8 I.C.

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73310155929 S10R-SWUCL-3
73310155929 S10R-SWUCL-3 $ 130.59 $ 163.24

55929 S10R-SWUCL-3. Pos 80° Trigon Boring Bar LH. Style U, Neg 3° WCMT 3/8 I.C.

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73310155932 S12S-SWUCR-3
73310155932 S12S-SWUCR-3 $ 157.03 $ 196.29

55932 S12S-SWUCR-3. Pos 80° Trigon Boring Bar RH. Style U, Neg 3° WCMT 3/8 I.C.

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73310155933 S12S-SWUCL-3
73310155933 S12S-SWUCL-3 $ 157.03 $ 196.29

55933 S12S-SWUCL-3. Pos 80° Trigon Boring Bar LH. Style U, Neg 3° WCMT 3/8 I.C.

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73310155544 S08K-SDUCR-2
73310155544 S08K-SDUCR-2 $ 78.90 $ 98.62

55544 S08K-SDUCR-2. Mini Pos 55° Diamond BorBar RH. Style U, Neg 3° DCMT 1/4 I.C.

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73310155565 S08M-SDUCL-2
73310155565 S08M-SDUCL-2 $ 119.53 $ 149.41

55565 S08M-SDUCL-2. Pos 55° Diamond Boring Bar LH. Style U, Neg 3° DCMT 1/4 I.C.

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73310155564 S08M-SDUCR-2
73310155564 S08M-SDUCR-2 $ 119.53 $ 149.41

55564 S08M-SDUCR-2. Pos 55° Diamond Boring Bar RH. Style U, Neg 3° DCMT 1/4 I.C.

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73310155561 S06M-SDUCL-2
73310155561 S06M-SDUCL-2 $ 119.53 $ 149.41

55561 S06M-SDUCL-2. Pos 55° Diamond Boring Bar LH. Style U, Neg 3° DCMT 1/4 I.C.

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73310155809 S16T-SVUCL-3
73310155809 S16T-SVUCL-3 $ 284.29 $ 355.36

55809 S16T-SVUCL-3. Pos 35° Diamond Boring Bar LH. Style U, Neg 3° VCMT 3/8 I.C.

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73310155560 S06M-SDUCR-2
73310155560 S06M-SDUCR-2 $ 119.53 $ 149.41

55560 S06M-SDUCR-2. Pos 55° Diamond Boring Bar RH. Style U, Neg 3° DCMT 1/4 I.C.

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73310155783 S16T-SDUPL-3
73310155783 S16T-SDUPL-3 $ 270.50 $ 338.12

55783 S16T-SDUPL-3. Pos 55° Diamond Boring Bar LH. Style U, Neg 3° DP_T 3/8 I.C.

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73310155800 S12S-SVUCR-2
73310155800 S12S-SVUCR-2 $ 205.80 $ 257.25

55800 S12S-SVUCR-2. Pos 35° Diamond Boring Bar RH. Style U, Neg 3° VCMT 1/4 I.C.

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73310155801 S12S-SVUCL-2
73310155801 S12S-SVUCL-2 $ 205.80 $ 257.25

55801 S12S-SVUCL-2. Pos 35° Diamond Boring Bar LH. Style U, Neg 3° VCMT 1/4 I.C.

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73310155804 S16T-SVUCR-2
73310155804 S16T-SVUCR-2 $ 284.29 $ 355.36

55804 S16T-SVUCR-2. Pos 35° Diamond Boring Bar RH. Style U, Neg 3° VCMT 1/4 I.C.

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73310155808 S16T-SVUCR-3
73310155808 S16T-SVUCR-3 $ 284.29 $ 355.36

55808 S16T-SVUCR-3. Pos 35° Diamond Boring Bar RH. Style U, Neg 3° VCMT 3/8 I.C.

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73310155812 S20U-SVUCR-3
73310155812 S20U-SVUCR-3 $ 306.49 $ 383.11

55812 S20U-SVUCR-3. Pos 35° Diamond Boring Bar RH. Style U, Neg 3° VCMT 3/8 I.C.

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73310155782 S16T-SDUPR-3
73310155782 S16T-SDUPR-3 $ 270.50 $ 338.12

55782 S16T-SDUPR-3. Pos 55° Diamond Boring Bar RH. Style U, Neg 3° DP_T 3/8 I.C.

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73310155781 S12S-SDUPL-3
73310155781 S12S-SDUPL-3 $ 191.23 $ 239.04

55781 S12S-SDUPL-3. Pos 55° Diamond Boring Bar LH. Style U, Neg 3° DP_T 3/8 I.C.

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73310155813 S20U-SVUCL-3
73310155813 S20U-SVUCL-3 $ 306.49 $ 383.11

55813 S20U-SVUCL-3. Pos 35° Diamond Boring Bar LH. Style U, Neg 3° VCMT 3/8 I.C.

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Kyocera A08MSVPBR2AE Right-Hand, Positive Rake, Coolant-Through Boring Bar
Kyocera A08MSVPBR2AE Right-Hand, Positive Rake, Coolant-Through Boring Bar $ 209.94 $ 237.03

Kyocera A08MSVPBR2AE Right-Hand, Positive Rake, Dynamic Bar Coolant-Through Boring Bar with 117.5 Degree Lead Angle and 0.7900" Minimum Bore Dia.

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Ultra Dex s24u-mvunr3 S24U MVUNR3. Arch Part # 957-000-437
Ultra Dex s24u-mvunr3 S24U MVUNR3. Arch Part # 957-000-437 $ 392.47

S24U MVUNR3 Profiling Steel 1.960" Min Bore x 1-1/2" Shank x 14" OAL RH Boring Bar for VNMG33_ Inserts with .375" Offset

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Ultra Dex s24u-mdunr4 S24U MDUNR4. Arch Part # 957-000-434
Ultra Dex s24u-mdunr4 S24U MDUNR4. Arch Part # 957-000-434 $ 392.47

S24U MDUNR4 Profiling Steel 1.960" Min Bore x 1-1/2" Shank x 14" OAL RH Boring Bar for DNMG43_ Inserts with .375" Offset

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Ultra Dex s24u-mdunl4 S24U MDUNL4. Arch Part # 957-000-433
Ultra Dex s24u-mdunl4 S24U MDUNL4. Arch Part # 957-000-433 $ 392.47

S24U MDUNL4 Profiling Steel 1.960" Min Bore x 1-1/2" Shank x 14" OAL LH Boring Bar for DNMG43_ Inserts with .375" Offset

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Ultra Dex s20t-mvunr3 S20T MVUNR3. Arch Part # 957-000-418
Ultra Dex s20t-mvunr3 S20T MVUNR3. Arch Part # 957-000-418 $ 342.34

S20T MVUNR3 Profiling Steel 1.705" Min Bore x 1-1/4" Shank x 12" OAL RH Boring Bar for VNMG33_ Inserts with .375" Offset

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Ultra Dex s20t-mdunr4 S20T MDUNR4. Arch Part # 957-000-417
Ultra Dex s20t-mdunr4 S20T MDUNR4. Arch Part # 957-000-417 $ 342.34

S20T MDUNR4 Profiling Steel 1.700" Min Bore x 1-1/4" Shank x 12" OAL RH Boring Bar for DNMG43_ Inserts with .375" Offset

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Ultra Dex s20t-mdunr3 S20T MDUNR3. Arch Part # 957-000-416
Ultra Dex s20t-mdunr3 S20T MDUNR3. Arch Part # 957-000-416 $ 342.34

S20T MDUNR3 Profiling Steel 1.700" Min Bore x 1-1/4" Shank x 12" OAL RH Boring Bar for DNMG33_ Inserts with .250" Offset

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Ultra Dex s20t-mdunl4 S20T MDUNL4. Arch Part # 957-000-415
Ultra Dex s20t-mdunl4 S20T MDUNL4. Arch Part # 957-000-415 $ 342.34

S20T MDUNL4 Profiling Steel 1.700" Min Bore x 1-1/4" Shank x 12" OAL LH Boring Bar for DNMG43_ Inserts with .375" Offset

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Ultra Dex s20t-mdunl3 S20T MDUNL3. Arch Part # 957-000-414
Ultra Dex s20t-mdunl3 S20T MDUNL3. Arch Part # 957-000-414 $ 342.34

S20T MDUNL3 Profiling Steel 1.700" Min Bore x 1-1/4" Shank x 12" OAL LH Boring Bar for DNMG33_ Inserts with .250" Offset

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Ultra Dex s16x-svfbr3 S16X SVFBR3. Arch Part # 957-000-404
Ultra Dex s16x-svfbr3 S16X SVFBR3. Arch Part # 957-000-404 $ 201.55

S16X SVFBR3 Profiling Steel 1.310" Min Bore x 1" Shank x 9" OAL RH Boring Bar for VBMT33_ Inserts with .250" Offset

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Ultra Dex s16s-mdunr3 S16S MDUNR3. Arch Part # 957-000-393
Ultra Dex s16s-mdunr3 S16S MDUNR3. Arch Part # 957-000-393 $ 239.66

S16S MDUNR3 Profiling Steel 1.310" Min Bore x 1" Shank x 10" OAL RH Boring Bar for DNMG33_ Inserts with .250" Offset

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