Spur gear module 2.5 z=51 with hub
Available product promotions:
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Weight2kg
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UPC Code5908453536525
Product Description
Spur gear module 2.5, z=51, with hub
This module 2.5 spur gear (51 teeth, with hub) is used wherever reliable, maintenance-free power transmission via involute gearing is required. The gear is made of C45E steel (EN 10083-1); the involute tooth profile and 20° pressure angle ensure smooth, quiet meshing with gears or racks of the same module.
Technical data
| Module (m) | 2.5 |
| Pressure angle | 20° |
| Number of teeth (z) | 51 |
| Type | Gear with hub |
| Outside diameter (De) | 132.5 mm |
| Pitch diameter (Dp) | 127.5 mm |
| Hub outer diameter (d) | 90 mm |
| Pilot bore diameter (D) | 20 mm |
| Tooth width (h) | 25 mm |
| Overall hub height (A) | 40 mm |
| Weight | 2 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.
How do you choose a gear rack to match a specific module gear?
The principle is the same as when selecting two gears - the rack must have the same module as the drive gear. Remember to choose the right rack width, which should be equal to or slightly wider than the face width of the gear, in order to transmit the full torque.
Do straight-tooth module gears have a specific mounting direction?
No, a straight-tooth gear is symmetrical and can be mounted either way round; direction only matters with helical teeth, where the helix angle must match the mating gear.
How do you calculate the ratio of a gear pair of two module gears with different numbers of teeth?
The ratio is calculated as the quotient of the number of teeth of the driven gear to that of the driving gear (i = Z2/Z1); the module must be identical for both gears, otherwise meshing will not work at all.
Where is this product used?
Used in the construction and servicing of gear reducers and gear transmissions for agricultural and construction machinery, and wherever precise and repeatable torque transmission matters.
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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Weight2kg
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UPC Code5908453536525