What is meant by spot facing?

: to machine or face a spot of surface as the seat for a bolt head or nut.

What is the difference between spot facing and Counterboring?

The difference between counterboring and spotfacing is that a counterbored surface usually has a shoulder at the bottom of the enlarged hole, while a spotfaced surface is flat and always at right angles with the axis of the hole.

What is spot facing used for?

Spot Facing Screw Holes A spotface generally takes the form of a very shallow counterbore and is used in order to provide a smooth, flat, accurately located surface.

What is spot facing in mechanical?

A spotface or spot face is a machined feature in which a certain region of the workpiece (a spot) is faced, providing a smooth, flat, accurately located surface. Zero-angle cutters obviate this, functioning similarly to the traditional counterbore cutters of manual machining but needing no pilot.

What is a spot face cutter?

Back Spotface Cutters are designed for use in restricted areas where conventional spotfacing cannot be accomplished. Various styles and sizes are supplied with quick release Bayonet Holding or Pin Type Drives.

What are boring tools?

: a boring bit with its supporting boring bar and arbor, used to enlarge and accurately finish a large bore previously formed by casting or otherwise.

What is a shallow counterbore called?

A spotface often takes the form of a very shallow counterbore. As mentioned above, the cutters that produce counterbores are often also called counterbores; sometimes, to avoid ambiguity, the term counterbore cutter is used instead.

What is a countersunk hole?

A countersink (symbol: ⌵) is a conical hole cut into a manufactured object, or the cutter used to cut such a hole. A countersink may also be used to remove the burr left from a drilling or tapping operation thereby improving the finish of the product and removing any hazardous sharp edges.

How is chamfering done?

Chamfering is making a small cut, usually at a 45 degree angle, to remove a 90 degree edge. Chamfering is used in woodworking, in glass cutting, in architecture, and in CAD, and it’s also a useful tool for deburring. Chamfer is a noun as well as a verb, and is also frequently used as the name for such a cut.

What are six boring tools?

Drilling and Boring Tools

  • Standard twist drill.
  • Improved twist drill.
  • Titanium-coated bit.
  • Bradpoint bit.
  • Spade bit.
  • Powerbore bit.
  • Auger bit.
  • Forstner bit.

Is Bradawl a boring tool?

Bradawl Bradawl is also known as Gimlet is hand-operated tools and is used to small holes bore for instance for starting a screw or large nail. 7. Ratchet Brace Ratchet brace tool use for hold and turning a bit used for boring holes and has two jaws, which hold the particularly bent end of bit.

What are the dimensions of a Twin Size Mattress?

A twin size mattressis usually 38 inches wide and 75 inches long, for a total surface area of 2,850 square inches. The dimensions can vary slightly by companies, with some selling twin size mattresses that are 39 inches wide instead. We recommend a twin size mattress for any room that’s at least 7 feet by 10 feet. Twin and Twin XL Mattresses

What is the nominal size of a spotface?

For example, in Boeing Design Manual BDM-1327 section 3.5, the nominal diameter of the spot-faced surface is the same as the nominal size of the cutter, and is equal to the flat seat diameter plus twice the fillet radius. This is in contrast to the ASME Y14.5-2009 definition of a spotface, which is equal to the flat seat diameter.

Is there a standard for Spot face Dia?

The spotface diameter depends on using a washer(what size) or not. Depends on the type and size of the fastener head. If the fastener uses internal wrenching, then no wrench clearance. If the fastener uss external wrenching, then spotface diameter depends on required wrench clearance. There is no standard for spotface diameter for a hole size.

What’s the difference between backspotfacing and spot facing?

Spot facing of larger planar surfaces sometimes employs face mills. Backspotfacing ( back spot facing) is analogous to backboring, meaning that the tool manages to reach to the far side of the workpiece (away from the spindle side) and cut back toward the spindle.