Spur gear module 3 z=55 with hub
Available product promotions:
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Weight6,1kg
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UPC Code5908453537102
Product Description
Spur gear module 3, z=55, with hub
This module 3 spur gear (55 teeth, with hub) is used wherever reliable, maintenance-free power transmission via involute gearing is required. 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) | 3 |
| Pressure angle | 20° |
| Number of teeth (z) | 55 |
| Type | Gear with hub |
| Outside diameter (De) | 171 mm |
| Pitch diameter (Dp) | 165 mm |
| Hub outer diameter (d) | 100 mm |
| Pilot bore diameter (D) | 20 mm |
| Tooth width (h) | 30 mm |
| Overall hub height (A) | 50 mm |
| Weight | 6.1 kg |
| Material | C45E steel (UNI EN 10083-1) |
Frequently asked questions
How do you cut a keyway in a module gear with a small hub?
In gears with a small hub, the keyway is slotted with great care so as not to weaken the wall above the tooth. If there is not enough space, we recommend dispensing with a standard key (feather key) in favour of mounting with clamping bushes (locking assemblies).
How can you check whether two module gears will mesh with each other?
There is one absolute condition: both gears must have exactly the same module (e.g. m=2) and the same pressure angle (standard 20°). If the modules differ by even a fraction of a millimetre, the teeth will start to shear and the gearbox will be destroyed.
Why is the pilot bore in a module gear often smaller than required?
A "rough" bore allows you to bore it out yourself to the exact, non-standard size of the customer's shaft - a ready-made large bore from stock would rarely match the required size perfectly.
Does a higher number of teeth (z) with the same module mean a stronger gear?
Not directly - tooth strength depends mainly on the module and face width, not on the number of teeth; a larger z with the same module simply gives a larger gear diameter and a higher ratio relative to the mating gear.
Where is this product used?
Used in industrial machine drives, gate and industrial door automation and as a spare part for existing module gear drives - you only need to keep the same module and pressure angle.
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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Weight6,1kg
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UPC Code5908453537102