Spur gear module 2.5 z=31 with hub
Available product promotions:
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Weight1,14kg
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UPC Code5908453536327
Product Description
Spur gear module 2.5, z=31, with hub
This module 2.5 spur gear (31 teeth, with hub) is used wherever reliable, maintenance-free power transmission via involute gearing is required. The base material is C45E structural steel (EN 10083-1) - a proven choice for gear transmission components used in Polish industry.
Technical data
| Module (m) | 2.5 |
| Pressure angle | 20° |
| Number of teeth (z) | 31 |
| Type | Gear with hub |
| Outside diameter (De) | 82.5 mm |
| Pitch diameter (Dp) | 77.5 mm |
| Hub outer diameter (d) | 55 mm |
| Pilot bore diameter (D) | 16 mm |
| Tooth width (h) | 25 mm |
| Overall hub height (A) | 40 mm |
| Weight | 1.14 kg |
| Material | C45E steel (UNI EN 10083-1) |
Frequently asked questions
How does a module gear differ from a chain sprocket?
A module gear meshes directly with another gear or gear rack, while a sprocket works with a roller chain - they have a different tooth profile and are not interchangeable, even though they look similar from a distance.
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.
Can a module gear be ordered with a number of teeth outside the standard catalogue range?
Yes, in addition to ready stock we also produce CNC gears to order with a non-standard number of teeth, and for short lead times we additionally print them using 3D technology from glass-fibre-reinforced plastics.
What does the pressure angle mean in module gears and why is it usually 20°?
The pressure angle defines the inclination of the tooth flank. In European industry the standard is 20°, because it provides the optimal balance between tooth root strength and quiet gearbox operation. This avoids the phenomenon known as tooth undercutting on smaller gears.
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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Weight1,14kg
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UPC Code5908453536327