Technical description

TECHNICAL INFORMATION

Definitions

Bonded abrasive tools are production tools that perform their task by cutting material being ground. They consist of abrasive grains and a bonding agent.

Abrasive material - natural or synthetic mineral substance disintegrated into grains of defined size and shape, having cutting properties.

Bond - material that holds together abrasive grains.

Grain and micrograin size - a number that expresses the range of grain dimensions (also referred as granulation, granularity).

Grade and micrograin dimensions - dimensions of grains and micrograins of abra¬sive material expressed in [mm] or [m].

Grade (of hardness) of bonded abrasive tool - the strength with which the bond holds the abra¬sive grain together. Expressed in letters from E to W.

Structure - a number that expresses the percentage portion of abrasive grain in the whole volume of abrasive tool.


In accordance with origin criterion, abrasive materials can be divided into:

  • natural
  • synthetic materials, obtained in electrothermal as well as in physical and chemical processes

In accordance with grade of hardness criterion, they can be divi¬ded into:

  • hard
  • extra hard materials.

Abrasive tools manufactured from the hard abrasive materials are essentially divided into:

  • bonded
  • coated.

In case of bonded abrasive tools, abrasive grains are held together by a bonding material: vitrified, resin, rubber or magnesite.

The following groups can be distinguished here: grinding wheels, grinding seg¬ments, abrasive sticks.

In case of coated abrasive tools, the abrasive layer is bonded with paper, fabric, fibre backing material by adhesive. Sheets, tapes, belts, discs, etc. may be distinguished here.

The Zakład Artykułów Ściernych ANDRE ABRASIVE ARTICLES manufactures bonded abrasive tools using hard abrasive materials. Assort¬ment and technical characteristics are presented in the following catalogue sheets.

TRADE INFORMATION

Ordering mode.

Important!

Typical, general-purpose and ready available from store abrasive tools are supplied imme¬diately after they are ordered.
Orders for other atypical and special abrasive tools are accepted in accordance with the mutually agreed mode and dates.

Order.

  1. The order will be complete if the following elements have been accurately defined:
    • Quantity
    • Type, Shape / Profile
    • Dimensions
    • Characteristics
    • Required operating speed
  2. On page 101 in this catalogue there is a “Questionnaire” allowing for collecting of the data necessary for selection of the correct technical characteristics for the given grinding tool.

*) In Table 4 on page 26 a series of normalized operating speeds is presented. In case the speed parameter is missing in the order, this means an acceptation of appropriate standard, normalized values.