DHD3.5 Shank

Mincon has a comprehensive range of DTH Drill Bits to suit all types of applications and drilling processes. There are a number of different drill bit head designs for the DHD3.5 shank and Mincon Sales Technicians can work with you to determine the ideal design for your application.
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Key Features and Benefits

  • Manufactured from premium alloy steels.
  • Proprietary heat treatment processes to provide maximum service life and durability.
  • Compressive residual stress layer added to improve metal fatigue resistance.

For more information:

+40 314 253 800
info@romned.ro

Ron van Dam
CEO

Specifications Metric Imperial
Minimum Hole Size 85mm 3 3/8″
Number of Splines 8
Height of Foot Valve Above Strike Face 58.4mm 2.300″
Length of Shank 181mm 7.11″
Bearing Surface Diameter N/A
Mincon DTH Hammer(s) 3, 3.5
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Note: The Part Numbers below require the Carbide Insert type code to be added on the end to complete them. For a combination of carbide inserts use the gauge row code first and then the face code.

Carbide Insert Codes
Dome (Spherical) D
Ballistic B
Semi-Ballistic (Parabolic) P
Conical (Spike) S
Dome PCD Y
Diameter Face Type Part Number No. x Button Dia (inch) Flushing holes Weight Approx.
mm inch   Outer Inner Front   Kgs. Lbs.
90 3 1/2 Concave 34IR35C76 6- 7/16″ 3 – 7/16″ 3 – 7/16″ 2 5 11
90 3.5 Flat Face 34IR35F76 6- 7/16″ 6 – 7/16″ 2 5 11
90 3.5 Convex 34IR35V77 7 – 7/16″ 3 – 7/16″ 3 – 7/16″ 2 5 11
92 3.625 Convex 35IR35V77 7 – 7/16″ 3 – 7/16″ 3 – 7/16″ 2 5 11
95 3 3/4 Concave 36IR35C78 7 – 7/16″ 4 – 7/16″ 2 – 7/16″ 2 5 11
95 3 3/4 Flat Face 36IR35F18 8 – 1/2″ 6 – 7/16″ 2 5 11
95 3 3/4 Convex 36IR35V17 7 – 1/2″ 3 – 1/2″ 2 – 1/2″ 2 5 11
98 3 7/8 Concave 37IR35C78 8 – 7/16″ 4 – 7/16″ 2 – 7/16″ 2 5.9 13
98 3 7/8 Flat Face 37IR35F96 6 – 9/16″ 6 – 1/2″ 2 5.9 13
98 3 7/8 Convex 37IR35V78 8 – 7/16″ 4 – 7/16″ 4 – 7/16″ 2 5.9 13
102 4 Concave 40IR35C78 8 – 7/16″ 4 – 7/16″ 4 – 7/16″ 2 6.4 14
102 4 Flat Face 40IR35F78 8 – 7/16″ 7 – 7/16″ 2 6.4 14
105 4 1/8 Concave 41IR35C78 8 – 7/16″ 4 – 7/16″ 4 – 7/16″ 2 6.8 15
105 4 1/8 Convex 41IR35V78 8 – 7/16″ 4 – 7/16″ 4 – 7/16″ 2 6.8 15