Information about the DIN 874 for flatness and parallelism of granit surfaces.

Precision Straight Edge DIN 874, Form B. Cross-section in I-form and made of aluminium. Measuring range from 500mm upto 6000mm. characteristics and advantages compared to steel: – very light, good handling, midsection lacquered – high accuracy- and pliability-values – HC-coated and compressed, coating thickness 50µ ± 5µ

The levelness tolerance indicates the max deviation between the lowest and highest point (temperature of + 20°C). Levelness tolerance (flatness) in ?m for different degrees of precision.

Kinex makes a wide range of straight edges in different accuracies from workshop to inspection grade all adhering to strict German DIN standards. These straight edges are perfect for the professional machinist, tool and die maker, trades person, meticulous woodworker or …

In Europe, engineer’s straight edges are normally separated into four grades of accuracy: grade 00, 0, 1 and 2 in accordance with DIN 874. With grade 00 being the most accurate. In the US, straight edges are separated into three grades: AA, A and B. Grade AA is often referred to as laboratory, Grade A as inspection and Grade B as workshop.

Precision Straight Edge Form B, steel, accuracy GG 0, DIN 874 page 1. Extra fine ground edges and flat sides. Carbon steel, I-form shape with hand slots. Available from 2000 mm length. Includes calibration certificate.

Roebuck steel straight edges are manu- factured to DIN 874 and are available in 2 grades. Each straight edge is serialised and marked with its supporting points on one side face.

Suitable for checking flatness. Tempered special steel. Smooth ground faces and polished edge. Insulation to counteract heat from hand. The measurement edge has a 30° angle and is black for better contrast. Tolerance according to DIN 874/00. Supplied in a wooden box.

RS Pro Steel Straight Edges DIN874/2 RS Stock No: 877-1797 Specifications: Deviation of flatness to DiN 874/2 & VDI/VDE/DGQ 2618 Marked with supporting points on side face Working surfaces and side faces are fine ground All straight edges individually marked with serial number

Precision Steel Straight Edges 1000 x 50 x 10 mm DIN 874/1, rectangular cross-section, inclusive workshop-calibration-certificate