DBA Disc Part Numbering System

Overview

DBA has designed an intuitive numbering system that allows the same underlying part number to be carried through the different DBA rotor series and disc styles.

All disc part numbers will begin with “DBA”, a number prefix is then used to denote the Series, while Suffux’s are used to denote the style.

A part number will be assigned a base part number for a Street Series disc. E.g. DBA040.

Though the addition of prefixes and suffixes, you will be able to easily identify which product number you are after. A part number may have more than one suffix if it has multiple features.

Part number Series

The suffix that is applied to a part number may be unique to that series, so it is important to view the whole part number. i.e. a slotted suffix (S) in Street Series is for a T2 slot, where a slotted suffix (S) in 4000 Series and 5000 Series is for a T3 slot. A full list of part number suffix’s is presented below by Series.

The numbers represent the rotor’s base part number, while the suffix ‘letter’ denotes the rotor’s style.

Variations

These part numbers start with the prefix number ‘4’ with a suffix ‘letter’ determining the rotor style.

Variations

5000 series rotors follow DBA’s 4000 series numbering system with the number prefix of ‘5’, however 5000 series rotors have 2 unique aspects:

• 5000 series rotors are a 2-piece design (Aluminium hats and cast iron rings). As such they are available as a complete assembly ready for direct replacement, or the hat or flat discs (rings) available separately.
• 5000 series rotors are often available with different coloured hats

When sold as individual components, it is important to note that the rings (flat discs) will start with a suffix of ‘.1’, hats will start with a suffix of ‘.2’, while a complete assembly will not have either ‘.’ Suffix.

In a complete assembly or ‘.2’ hat replacement only, the hat colour will be included in the part number.

5000 series part number structure

DBA 5000 series part numbers are composed in a strict order

*Note: a flat disc (ring) part number ‘.1’ will not have a hat colour associated with the part number
**Note: a hat part number ‘.2’ will not have a disc style associated with the part number

Hat colours

Note: 5000 Series full assemblies and hat components will contain the hat colour
*Colour available in particular applications only.

Style Variations

*DBA part numbers may also be a flat disc ‘.1’, i.e. DBA5040.1S

5000 Series examples: