Module gear M2 Z28 with hub, straight hardened teeth — Hubber
Hubber M2 Z28 HRC — cylindrical gear with hub, carbon steel, straight hardened teeth. Module 2; number of teeth: 28; bore 12 mm; outside diameter 60 mm. Face width 20 mm, overall 35 mm. From 1 piece, fulfilment within 48 h.
Module gear M2 Z28 with hub — Hubber
Steel cylindrical gear M2 Z28 by Hubber, with a hub and straight hardened teeth. Number of teeth: 28; module: 2 and a bore diameter of 12 mm. It is a component for transmitting motion in gear drives and systems working with a suitably selected gear rack.
Specifications and dimensions
| Parameter | Value |
|---|---|
| Manufacturer | Hubber |
| Source item code | M2 Z28 HRC |
| Type | Cylindrical module gear with hub |
| Teeth | Straight hardened teeth |
| Material | Carbon steel |
| Module | 2 |
| Number of teeth z | 28 |
| Dp — pitch diameter | 56 mm |
| De — outside diameter | 60 mm |
| d — bore diameter | 12 mm |
| D — hub diameter | 40 mm |
| A — overall width | 35 mm |
| B — face width | 20 mm |
| Sales unit | 1 piece |
Selection and applications
When selecting for machine mechanisms, drives and positioning systems, compare the module, number of teeth, face width, bore and available mounting space. The hub increases the overall width to 35 mm — this must not be confused with the face width of 20 mm. The mating gear or rack must have a matching module and the other tooth parameters required by the gear design.
Matching the module alone does not confirm full interchangeability. The source does not specify the pressure angle, accuracy grade, bore tolerance or numerical hardness. Before purchasing for a specific machine, check these requirements in its documentation. Select the shaft mounting method separately; we do not claim unconfirmed keyways or fastenings.
Frequently asked questions
What does M2 Z28 mean?
M2 specifies module 2, and Z28 denotes a tooth count of 28. The pitch diameter Dp of this variant is 56 mm.
Is this a sprocket?
No. This is a cylindrical gear with straight teeth for gear drives, rather than a sprocket for use with a chain.
Does the gear have a hub and hardened teeth?
Yes. Variant M2 Z28 HRC has a hub and hardened teeth. The HRC designation in the item code is not a specific hardness value.
What do the drawing labels mean?
d is the bore, D is the hub, Dp is the pitch diameter, De is the outside diameter, A is the overall width and B is the face width. The values are in the table above.
What are the minimum quantity and fulfilment time?
You can order 1 piece. Fulfilment within 48 hours; this does not guarantee the carrier's delivery time.
The main image is an original photorealistic visualisation of the series, rather than a photograph of the specific item supplied. The drawing is an illustrative diagram for identifying dimensions, not a manufacturing drawing. The specifications for this variant are given in the table.

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