Description
Overview:
The Masport Blade Boss 25mm is a genuine replacement hub that secures the cutting blade to the mower's crankshaft for safe, accurate operation. Made from durable metal, it provides a rigid, true-running mounting point that helps maintain blade alignment and cutting quality. Designed for Masport pedestrian rotary mowers, including RR18 and RR18SP, it is a direct replacement for OEM No. 031640. The 25 mm mounting size suits compatible Masport engines and decks, supporting reliable performance under regular use. This boss is intended for straightforward swap-out during routine maintenance or when the original hub shows wear, damage, or fretting. It is a practical, long-life part for domestic and professional users who need dependable blade retention and consistent results across varied grass conditions.
Key Features:
- Genuine Masport part for assured fit and compatibility (OEM No. 031640)
- 25 mm mounting size for the specified Masport crankshafts and blade sets
- Strong metal construction for stability, durability, and repeatable blade seating
- Helps reduce blade wobble and vibration when fitted correctly
- Direct-fit replacement with no modifications required on listed models
- Supports correct cutting performance by maintaining blade position
- Suitable for routine maintenance and end-of-life replacement of worn hubs
- Designed for quick installation using standard hand tools
- Compatible with a wide range of Masport aluminium and steel deck models
- Cross-references to Masport part numbers 031640 and MA031640
Typical Applications:
Used to replace a worn or damaged blade mounting boss on Masport walk-behind mowers. Ideal after impact events, when the blade slips, or when inspection shows fretting, distortion, or excessive play. Suitable for home gardens, commercial grounds, and contractor maintenance schedules.
Also known as:
Blade adaptor, blade hub, blade carrier, blade holder, blade mount, blade fixing boss, blade spindle boss, mower blade hub, blade attachment boss, blade coupling.
Fits Models:
300AL L, 300ALL, 500AL, 575AL, 575AL SP, 575ALSP, 625AL, 800AL, 800AL SP, 800ALSP, 800ST, 800ST SP, 800ST SPV, 800STSP, Contractor, Elite, Elite S18, Magnum, Maxicut, Oxford 48RS, Oxford 54RS, Prosmart SP, RR18, RR18SP, RR18SP ES, RR18SP H, RR18SP IN, RR18SP L, RR18SPH, RR18SPL, RR21SP, RRSP22, TITANIS, Titan, Titan IS
Alternate Part Numbers:
031640, MA031640
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