Hard part turning with new-generationCBN grades

• Lower cost per part through high-speed machining and longer tool life at lower speeds (CB7105)

• Lower cost per part when aiming for a one-cut strategy – a single cut with greater chip thickness – at high speed (CB7115, CB7125 and CB7135)

• Efficient and predictable machining with good surface finish

• High dimensional accuracy and tight tolerance of the machined component

Benefits

An innovation in hard part turningFor anyone working with transmission and hard part turning, there are reasons to choose our new-generation Cubic Boron Nitride (CBN) grades.

The grades' speed capabilities, more secure edge line and consistent tool life add value and result in lower cost per component.

Designed to meet the demands of hard part turning, the grades achieve efficient and secure machining with excellent surface finish.

CB7105 Low CBN content for enhanced crater wear resistance at higher cutting speeds. TiN-PVD coating for excellent surface finish.

CB7115 Low CBN content, with a good balance of crater wear resistance and edge line toughness.

CB7125 Medium CBN content and new PVD coating, with good fracture resistance and improved tool life.

CB7135 High CBN content for best fracture resistance and predictable heavy interrupted cut.

Positioning

Application area

* = HGR chip-breaking geometry

Edge preparation

200

Continuous cut Interrupted cut Heavy interrupted cut

vc (m/min)

160

120

80

CB7105Continuous cut, smaller depth of cut and smaller chip loads at high speed.

CB7115Continuous to light interrupted cut or larger chip loads at medium to high speed.

CB7125Medium interrupted cut, chamfered component edges.

CB7135Heavy interrupted cut, unchamfered component features.

Chipload

(mm2)

Product family

Grade CB7105 CB7125

S01525 S01525S01230*

S01520 S01520

S01515 S01515

S01020 S01025

- S02035

CB7115 CB7135

S01525 S01530

S01520 S01520

S01515 -

- S01025

S02030 -

CB7125

S01020

-

-

-

-

CB7105 CB7115 CB7125 CB7135

S01020 S01020 S01020T01020 S01530

S01520 S01520 S01520 -

S01515 S01515 S01515 -

- - - -

- S02030 S02030 -

First choice

Wiper

Xcel

Light

Strong

T-Max® P CoroTurn® 107 CoroTurn® TR

Hard part turning is usually a finishing or semi-finishing process with high dimensional accuracy and surface quality requirements.

Component materials are case hardened steel or induction hardened steel.

Typical machining challenges with these materials are surface and dimensional tolerance demands with competitive tool life. The new-generation CBN grades are specifically designed to handle these challenges as efficiently as possible.

Optimized edge preparation for the best balance between long tool life and reliable machining.

For more information, please contact your local Sandvik Coromant representative.

Head office: Sandvik Coromant1702 Nevins Rd, Fair Lawn, NJ 07410, USAE-mail: us.coromant@sandvik.comwww.sandvik.coromant.com

C-1040:225 en-US © AB Sandvik Coromant 2018

Component: GearMaterial: Case hardened steel, HRC 62Operation: External axial and facingMachine: Mazak QTN 300

Component: Outer race (CV-joint)Material: Induction hardened steel C53, HRC 60Operation: Internal turning – interrupted cutMachine: EMAG VSC400

Competitor Sandvik CoromantInsert CNGA120408 CNGA120408 S01030F 7125vc m/min (ft/min) 120 (394) 120 (394)fn mm/rev (in/rev) 0.12 (0.0047) 0.12 (0.0047)ap mm (inch) 0.1 (0.004) 0.1 (0.004)MRR cm3/min (in3/min) 1.44 (0.088) 1.44 (0.088)Tool life criteria 12 (out of tolerance) 12 (out of tolerance)Tool life (pieces) 5 12

Competitor Sandvik CoromantInsert TNGA160416 TNGA160416S01525F 7135vc m/min (ft/min) 180 (590) 180 (590)fn mm/rev (in/rev) 0.13 (0.0052) 0.13 (0.0052)ap mm (inch) 0.15 (0.0059) 0.15 (0.0059)MRR cm3/min (in3/min) 3.51 (0.214) 3.51 (0.214)Tool life criteria 11 (bad surface) 11 (bad surface)Tool life (pieces) 350 390

Performance – CB7125Customer case

Performance – CB7135Customer case

+140%Tool life

+12%Tool life