Drill Standards : IS, JIS, ANSI, DIN and BS
Wide Range : Sizes from 0.30mm to 100mm(Dia) and Length - up to 1200mm
Tolerances : h6 / h8 / Custom Tolerances
Material Grades used – M2, M35, M42 and ASP
View catalog• A small twist drill used to make centres in a piece of work about to drill further deep.
• Centre drills are usually double-sided drills with a 60' stepped point, held in a drill chuck or collet chuck in a lathe.
• A Center drill is used for drilling a hole on the axis of a shaft to hold it between centres.
• It was also used to drill centre holes on machining Center, but has been replaced by the spot drill (which has a simpler geometry) for this purpose.
The parts are
• Overall Length
• Body Diameter
• Drill Dia
• Drill Length
• Angle
• Overall length is maximum length of centre drill
• Maximum diameter of the Centre Drill is known as Body Diameter.
• The small diameter of centre drill is drill diameter and also known as pilot length
• The length of the small diameter which performs the operation is known as Drill length or Pilot Length.
• The angle of the tip of Center drill.
• countersink angles come in 3 angles: 60°, 82° and 90° included angles.
• A common angle used in live centres is 60°.
• Center drills come in two common types, Type A (DIN 333-A) and Type B (DIN 333-B), based on the Center drill angle.
• Type A forms a centre hole with a single 60-degree chamfer.
• Type B forms a hole with 2 chamfers, a 60-degree chamfer and additionally a 120- degree chamfer at the start of the hole
• There is also a type R (DIN 333-R) that has a radius instead of a chamfer. This forms a centre hole that results in more holding accuracy because there is contact only at a single point, but the load bearing capacity of the hole (ability to withstand lateral forces resulting from cutting) would be less.
• A small twist drill used to make centres in a piece of work about to drill further deep.
• Centre drills are usually double-sided drills with a 60' stepped point, held in a drill chuck or collet chuck in a lathe.
• A Center drill is used for drilling a hole on the axis of a shaft to hold it between centres.
• It was also used to drill centre holes on machining Center, but has been replaced by the spot drill (which has a simpler geometry) for this purpose.
The parts are
• Overall Length
• Body Diameter
• Drill Dia
• Drill Length
• Angle
• Overall length is maximum length of centre drill
• Maximum diameter of the Centre Drill is known as Body Diameter.
• The small diameter of centre drill is drill diameter and also known as pilot length
• The length of the small diameter which performs the operation is known as Drill length or Pilot Length.
• The angle of the tip of Center drill.
• countersink angles come in 3 angles: 60°, 82° and 90° included angles.
• A common angle used in live centres is 60°.
• Center drills come in two common types, Type A (DIN 333-A) and Type B (DIN 333-B), based on the Center drill angle.
• Type A forms a centre hole with a single 60-degree chamfer.
• Type B forms a hole with 2 chamfers, a 60-degree chamfer and additionally a 120- degree chamfer at the start of the hole
• There is also a type R (DIN 333-R) that has a radius instead of a chamfer. This forms a centre hole that results in more holding accuracy because there is contact only at a single point, but the load bearing capacity of the hole (ability to withstand lateral forces resulting from cutting) would be less.