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Tooling Inserts for Back Turning


High Performing Back Turning Inserts

  • Insert design result in low radial forces
  • Produces better roundness on the component
  • Keeps the desired size longer without adjustment
  • Chip is curled before it hits the already finished shoulder
  • Good chip-control by curling the chip away from the surface
  • Positive cutting rake improves production and tool-life
  • Only a narrow parting off insert is required in order to clean up the non finished cylindrical diameter
  • The final diameter is produced only 1 mm from the side of the insert and tool holder, or away from the guide bushing, resulting in good stability even when small diameters are produced
  • Small distance from the side to end of wiper which makes final diameter. Very suitable for small diameters.

Back Turning Insert Guide

Style C

Style C is used when there is an undercut required.

Style BT

Style BT inserts has a chamfer on the leading corner that improves the tool-life in harder materials. This insert is suitable when the wear on the style B insert is found in an early stage.

Style B

Style B is for general use in back turning applications in stainless steel, titanium, nimonic, hastaloy, high temperature alloys, alloyed steel and other hard and long chipped materials where good chip control is needed.

Style VLR

Style VLR is used for backturning when a smooth surface is needed when profiling. It is for example excellent to go in behind the head of a bone screw with.

Style BP

Style BP is used for sticky materials when there is a chance of an edge build up that can spoil the surface finish or reduce tool-life.

Style E

Style E is used for fine turning, using high cutting speed and low feed rate. This insert will give the best possible surface finish. By protecting the radius with the chamfer the tool life is extended compared with conventional full radius inserts.

Style B | Inserts for Back Turning in steel and other
hard and long chipped materials

            Cutting
rake°
Stock Price
group
Insert A B C R 8M C8 F8 B8 NF8 ND8
K11ER/L B12-2-0 2 1 0,4 0 15 12 a a b b - - A8
K11ER B12-2-05 2 1 0,4 0,05 15 12 r r r r - - A9
K11ER/L B12-3-0 3,5 1,5 0,6 0 15 12 a a b b - - A8
K15ER/L B12-2-0 2,5 1,3 0,5 0 15 12 a a b b - - A8
K15ER/L B12-4-0 4 1,9 0,7 0 15 12 a a b b r r A8
K15ER/L B12-4-05 4 1,9 0,7 0,05 15 12 a a b b - - A9
K15ER/L B12-4-1 4 1,9 0,7 0,1 15 12 a a b b r r A9
K15ER/L B12-4-2 4 1,9 0,7 0,2 15 12 a a b b r r A9
K20ER B12-7-0 7 3,2 1,3 0 15 12 r r r k - - A28
K20ER B12-7-2 7 3,2 1,3 0,2 15 12 r r r k r r A29
Back turning insert B

Style BP | Inserts for Back Turning in Sticky Materials

          Cutting
rake°
Stock Price
group
Insert A B C R Ax Rad 8M C8 F8 B8 NF8 ND8
K15ER BP12-2-0 2,5 1,3 0,5 0 20 12 14 r r r r - - A8
K15ER BP12-2-03 2,5 1,3 0,5 0,03 20 12 14 r r r r - - A9
K15ER BP12-2-05 2,5 1,3 0,5 0,05 20 12 14 r r r r - - A9
K15ER BP12-4-0 4 1,9 0,7 0 20 12 14 r r r r - - A8
K15ER BP12-4-1 4 1,9 0,7 0,1 20 12 14 r r r r r r A9
K15ER BP12-4-2 4 1,9 0,7 0,2 20 12 14 r r r r r r A9

Back turning inserts style BP

 

Style BT | Inserts for Back Turning in Tough Materials for Longer Tool Life

            Cutting
rake°
Stock Price
group
Insert A B C R 8M C8 F8 B8 NF8 ND8
K15ER BT12-4-2 4 1,9 0,7 0,2 15 12 r r r r r r A9
K20ER BT12-7-2 7 3,2 1,3 0,2 15 12 r r r r r r A29

 

Insert for back turning style BT

Style VLR | Inserts for Back turning Profiles

            Cutting
rake°
Stock Price
group
Insert A B R1 R2 8M C8 F8 B8    
K15ER VLR12-05 3 1,9 0,05 0,05 35 20 r r r r - - A7
K15ER VLR12-08 3 1,9 0,08 0,08 35 20 r b r b - - A7
K15ER VLR12-15 3 1,9 0,15 0,15 35 20 r b r b - - A7
K15ER VLR12-12 3 1,9 0,1 0,2 35 20 r b r b - - A7
K15ER VLR12-2 3 1,9 0,2 0,2 35 20 r r r r - - A7
K15ER VLR8-2 3 1,9 0,2 0,2 42 8 - - - - r r A7

 

Insert for back turning profiles

Style C | Inserts for Back Turning when there is an

undercut requested

          Cutting
rake°
Stock Price
group
Insert A B C R 8M C8 F8 B8
K11ER C0-1-0 1,3 1 0,2 0 30 0 r r r k A6
K15ER/L C0-3-0 3 1,9 0,2 0 20 0 a a b k A7

 


 

 

Back turning inserts when undercut

 

 

Style E | Inserts for an Extra Finishing Cut; Back Turning

  Max cut         Cutting
rake°
  Price
group
Insert C t R R2 8M F8 B8
K15ER E16-0-0 0,8 0 0,6 0,05 0,15 30 16 r r k A8
K15ER E16-12 0,8 0 0,6 0,1 0,2 30 16 r r r A8
K15ER E16-1-0 1 0,12 0,6 0,1 0 45 16 r r r A8

Please note: Fine turning insert. Maximum depth of cut in one pass is 0,08mm.

 

Back turning insert for extra finishing cut

More Insert Information:   Grades of Carbide    Recommended Cutting Data

Inserts to be used with K-type Toolholder L
11
15
20
T
2,5
2,1
3,5

 

Stock status
a = Stock standard in ER and EL
b = Stock standard in ER; EL against inquiry
c = Stock standard in EL; ER against inquiry

r = Stock standard in ER only
l = Stock standard in EL only
k = ER and EL against Inquiry

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