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CoroBore 824 XS New boring concepts

Boring small-diameter holes even at long overhangs has never been easier. Sandvik Coromant is now expanding the fine boring offer with new boring concepts. CoroTurn XS boring bars and the exchangeable-head (EH) system make boring down to 1 mm (0.039 inch) diameter possible, while keeping your tool inventory at a minimum.

  

Benefits

  • Increased accessibility with Coromant Capto and EH modular interfaces in small diameters
  • Boring with solid carbide boring bars reduces vibration and increases stability when working with long overhangs
  • Boring bars with indexable inserts and diameter adjustability increase tooling flexibility while reducing tool investment and inventory costs

 

Features

  • Fine boring tool with precision diameter adjustment of 2 microns (nonius scale) to obtain tight tolerances of IT6
  • Great tooling flexibility: choose from the Coromant Capto® or the EH system to bore different diameters
  • Standard CoroTurn® XS inserts available from diameter 1 mm (0.039 inch)
  • Solid carbide boring bars with standard CoroTurn® 107 indexable inserts available from diameter 6 mm (0.236 inch)
  • Adjustment range for CoroBore® 824 XS Coromant Capto and Coromant EH adaptors
    • C3, shank 04, 06, 08 = 1 mm radially
    • C4, shank 10 = 1.5 mm radially

 

 
 

 

More fine boring concepts with
Coromant EH and Coromant Capto: CoroBore 825

Application

  • Fine boring of small holes in all materials
  • Stable boring at longer overhangs (up to 6 × diameter)
  • Better accessibility with small boring head diameters, making it possible to bore in complex components
  • Solid carbide shanks provide longer boring depths – up to 6 × diameter

 

ISO application area

 

 

Diameter, inch ​
mm
 
 CoroBore 824EH - SC, Ø1 – 8.2 mm (0.04-0.32 inch)
 
 CoroBore 824CC - SC, Ø1 – 8.2 mm (0.04-0.32 inch)
 
 CoroBore 824CC – indexable boring bar , Ø6 – 20 mm (0.236- 0.787 inch)
 
 CoroBore 824EH – indexable boring bar , Ø6 – 20 mm (0.236-0.787 inch)​

 

​Recommendations

Recommendation for using EH boring heads
  • A conical shank gives best hole quality at long overhangs, regardless of which chuck is used
  • For a cylindrical shank the best straightness is generally given by short overhangs
  • Choose conical solid carbide for overhangs up to 6 × diameter
  • Choose heavy metal shanks for best stability and reduced vibration tendencies at short overhangs
  • Choose CoroChuck™ 930 for best stability and production security

 

EH coupling ​ ​ ​
Size​ Key width​ Torque
Nm ft-lbs
EH16​ 12​ 30​ 22​
EH20​ 16​ 50​ 39​
EH25​ 20​ 65​ 48

 

​Product range

CoroBore 824 XS adaptors for CXS inserts – Coromant Capto or EH coupling​ ​ ​ ​
Diameter, mm (inch)​ ​ Machine side interface​ ​
DC min​ DC max Shank size Insert​ Coromant Capto​ EH​
1 (0.039)​ 6.2 (0.244)​ 04 CXS​C3​25​
6.2 (0.244)​ 8.2 (0.323)​ 06​ CXS​C3​25​

 

 
CoroBore 824 XS adaptors for CXS boring bars with CoroTurn 107 – Coromant Capto or EH coupling
Diameter, mm (inch)​ ​ Machine side interface​ ​
DC min​ DC max Shank size Insert​ Coromant Capto​ EH​
6 (0.236)​ 10 (0.394)​ 06 TC05 (TC1(1))​C3​25​
10 (0.394)​ 14 (0.551)​ 08​ TC06 (TC1.2(1.2))​C4​25​
14 (0.551)​20 (0.787)​10​TC09 (TC1.8(1.5))​C4​25​
 
 
 
 
 
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