RS PRO Steel 25 Teeth Spur Gear, 0.5 Module, 4mm Bore Diam, 12.5mm Pitch Diam, 9mm Hub Diam

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Subtotal (1 unit)*

£12.94

(exc. VAT)

£15.53

(inc. VAT)

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  • 19 unit(s) ready to ship
  • Plus 999,999,980 unit(s) shipping from 21 November 2025
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Units
Per unit
1 - 4£12.94
5 - 9£12.68
10 - 24£12.42
25 +£12.16

*price indicative

RS Stock No.:
878-7825
Brand:
RS PRO
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Brand

RS PRO

Module

0.5

Number of Teeth

25

Material

Steel

Bore Diameter

4mm

Pitch Diameter

12.5mm

Hub Diameter

9mm

Face Width

4mm

RoHS Status: Exempt

COO (Country of Origin):
CN

RS PRO Steel Spur Gears


Use these steel spur gears from RS PRO to get your industrial equipment moving. Our extensive range of spur gears is selected for their high-quality, ease of use and performance while ensuring the correct power, torque multiplication, and speed reduction. To obtain your ideal solution, browse the range using the improved filters to locate the module to suit your application.

Also known as


  • Straight gears

  • Straight-cut gears

  • Spur wheels

  • Spur gearing

Features and Benefits


  • Steel EN8 (080M40/080M46) or equivalent

  • 20° pressure angle

  • Metric

  • DIN Standard - DIN 867, DIN 3962, DIN 3963, Grade / Quality 9 or equivalent

  • Standard tolerance, unless otherwise stated ±0.25mm

Applications


  • Machine Tools

  • Transmissions

  • Speed Reduction

FAQs


What is the module?

A module is expressed as d/N which is the pitch diameter divided by the number of teeth. This explains the size of the gear or qualifies the unit size of a gear based on the number of teeth. Use this parameter to conclude if the gear is compatible.

Note

SSN type gears come with M4 grub screws fitted.
SSN10/10B and SSN10/12B are hobbed type pinions with cutter runout after the 5 mm gear face width.

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