Spur gear module 8 z=28 with hub
Available product promotions:
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Weight24kg
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UPC Code5907009385525
Product Description
Spur gear module 8, z=28, with hub
Gear module 8, z=28, with hub - a robust component for building and repairing gear transmissions, reducers and rack drives (gear rack + gear). The standard material is C45E steel (UNI EN 10083-1), widely used in the construction of gear transmissions, gear racks and module drives.
Technical data
| Module (m) | 8 |
| Pressure angle | 20° |
| Number of teeth (z) | 28 |
| Type | Gear with hub |
| Outside diameter (De) | 240 mm |
| Pitch diameter (Dp) | 224 mm |
| Hub outer diameter (d) | 170 mm |
| Pilot bore diameter (D) | 30 mm |
| Tooth width (h) | 80 mm |
| Overall hub height (A) | 110 mm |
| Weight | 24 kg |
| Material | C45E steel (UNI EN 10083-1) |
Frequently asked questions
How can a module gear be secured against sliding along the shaft?
Besides a key or a clamping bush, set screws (locking screws) in the hub, thrust washers or retaining rings are also used - the choice depends on whether the transmission operates under variable axial load.
Does a module gear require constant lubrication?
Enclosed gears (in speed reducers) run in oil or grease, while open systems (gear + rack) require periodic manual lubrication - without it, friction and tooth wear increase many times faster.
How should gears be stored correctly before installation?
Preferably in a dry room, protected against moisture and dust, with a light layer of preservative oil on the teeth and bore - especially important for C45E carbon steel, which can start to corrode without protection.
Why is precise machining of module gears crucial for drive service life?
A precisely cut tooth involute guarantees that the gears roll on each other without micro-impacts or slippage. This reduces friction lowers the operating temperature and dramatically extends the service life of the entire gearbox.
Where is this product used?
Module gears of this type are used in speed reducers, machine gearboxes, CNC machine tools and in rack drives of sliding and entrance gates.
When placing your order, please check the current stock level of this gear - the lead time depends on it and is clearly stated according to the quantity available in the given warehouse.
Product photos are for illustrative purposes only.
Product Features
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Weight24kg
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UPC Code5907009385525