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What is jobber drill?

Table of Contents

  • What is jobber drill?
  • What is Jobber Series?
  • How can you tell the difference between a masonry drill bit?
  • What is the maximum size of drill bit?

What is jobber drill?

Jobber drill bits are straight shank drills suitable for general purpose applications. This category includes bright, treated, TiN coated drills to machine a variety of materials. Heavy duty-split point drills, high helix and para-flute jobber drills along with cobalt bits meet the needs of most machinists.

What are the different lengths of drill bits?

Jobber Length Drill Bit Chart

Fractional Sizes Decimal Equivalent (Inches) Overall Length (Inches)
9/64” 0.1406 2-7/8”
5/32” 0.1562 3-1/8”
11/64” 0.1719 3-1/4”
3/16” 0.1875 3-1/2”

What is HSS jobber drill bit?

HSS Straight Shank Jobber Drill (A100) These professional Drill Bits have been manufactured from high-quality steel and steam tempered to improve wear resistance and durability.

What is Jobber Series?

Manufactured from raw materials of excellent quality, the HSS Parallel Shank Twist Drills (Jobber Series) provide a smooth and clean drilling. The HSS Parallel Shank Twist Drills are very useful because of their numerous qualitative features. Features.

What is jobber length?

Jobbers have a length anywhere from 8-12 or 9-14 (depending on who you ask) times the diameter. These bits can be measured using a number of different systems including a basic number range (1-80), letters (A-Z), wire (increase by whole number), standard metric sizing or in fractional sizes.

How are drill bits measured?

Typical drill bits have markings somewhere on the shank above the threads. It’s small, but it usually has the drill-bit diameter stamped into the metal; the number is written in fractions. For example, the markings may read: 1/4-inch, 3/6-inch or 25/32.

How can you tell the difference between a masonry drill bit?

The main visual difference is that masonry bits don’t have the blunt, gently rounded tip you’ll see on standard general-purpose bits. Instead, the tip is shaped rather like an arrowhead or is sometimes pentagonal like the home plate on a baseball diamond.

How long is a masonry drill bit?

Drill bit sizes range from 3mm to 16mm. When it comes to length, there are standard lengths, but there also long masonry drill bits that range from 300 to 400 mm. The size and length of the drill bit you choose depend on the length or the size of the holes you want to make.

What exactly is a “jobber” drill?

To me a “jobber drill” is a general purpose twist drill having length, grind, and material that make it a good choice for the widest variety of work that might be done by a “jobber”; a job shop. They typically are 118 deg, right hand twist, cutting depth of eight or ten diameters, with no special coating.

What is the maximum size of drill bit?

– Core drill bits up to 6” walls – Concrete demolition – Professional demolition and construction work.

What are the types of drill bits?

Twist Drill Bits. When it comes to drilling holes,today’s tools include twist and thick drills.

  • Brad Point Drill Bits. When you need to drill small,precise holes,you’ll want to use a brad point bit.
  • Flat Drill.
  • Straight Fluted Drill.
  • Countersinking Drill.
  • Counter Boring Drill.
  • Oil Hole or Tube Drill.
  • Spirec Drill.
  • Plug Cutter.
  • Tile Bits.
  • How to lengthen drill bit?

    Let the drill bit cool off after you have finished your project.

  • Wipe the drill and drill bit with a clean,dry towel or cleaning cloth.
  • Use a clean,dry toothbrush to brush off any shavings or other debris that may cling to the tool.
  • Apply machine oil lightly with a paper towel or microfiber cloth.
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