Article number code

The article number consists of a combination of digits and letters and is divided into three blocks linked by hyphens for better clarity. The coupling series, the type and the size are encoded in blocks 1 and 2. Block 3 contains information applying only to the coupling specified in blocks 1 and 2. The three blocks of the article number are supplemented by information on the bore of the coupling hub parts and information on "Special Types".

The bore details with the code letter L always refer to the bore diameter D1 of the hub part shown on the left on the dimension drawing. The order code beginning with M always refers to the bore diameter D2 of the hub part shown on the right on the dimension drawing.

The order code without the letter "-Z" refers to tolerance H7 without keyway. An exception to this rule is type BNN of series -BIPEX-S to which tolerance H7 with keyway applies.

To order other types with keyway, the letter "-Z" must be appended to the article number.
L40 / M40 = Keyway according to DIN 6885, keyway width JS9
L41 / M41 = Keyway according to DIN 6885, keyway width P9