Parts HeadQuarters Inc

PHQ36IR Drill Speeds

 

Summary of Results

Bit
Diameter

Bit
Diameter

Steel
Diameter

 Steel
Diameter

Number
Rods
Drilled

Drill Rod
Length

Penetration
Av Meters
per Minute

Penetration
Av Inches
per Minute

Bit Description

T38 Retrac Button Bit

64 mm

2.5 inch

1.50 inch

38 mm

53

1.22 m

0.59

23.2

T38 Regular Button Bit

64mm

2.5 inch

1.50 inch

38 mm

44

1.22 m

0.62

24.5

T38 Retrac Button Bit - bad regrind

64 mm

2.5 inch

1.50 inch

38 mm

24

1.22 m

0.47

18.5

T45 Retrac Button Bit

76 mm

3.0 inch

1.75 inch

45 mm

111

1.22 m

0.65

25.8

T45 Retrac Button Bit (new)

89 mm

3.5 inch

1.75 inch

45 mm

24

1.22 m

0.31

12.3


NOTE:

Drilling speed tests were conducted by Major Drilling using a PHQ36IR Independent Rotation Drill mounted on a MKV Four Foot Feed Assembly with a PHQ15001H Heavy Duty Centralizer with inline F61 Lubricator and operated by a PHQ21001 Remote Control Panel.  The Long Hole Drill Assembly was mounted on a Taurus Drill Carrier drilling underground in medium to hard rock conditions.  Each drill rod was timed as it was added into the drill string in the process of drilling 30 to 100 foot holes and the total of the drilling times for all the rods was added up and averaged by the number of rods used.  It will be noted that a larger diameter drill rod (45mm as opposed to 38mm) will provide much better penetration rates even for a larger diameter bit.  This is a result of better transmission of blow energy through a larger cross section of drill rod, from the drill piston hitting on the shank down through the many joints in the drill string to the face of the bit in the hole.

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