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Racing Crankshaft Components Specification Example for Rental Motorcycles: Waterproof Version

Source:Aluminum Alloy Wheel Hub / Time:2026-09-18

Racing Crankshaft Components Specification Example for Rental Motorcycles: Waterproof Version

This is a worked specification for racing crankshaft components in a waterproof version programme. It is the document we would send a buyer who asks what exactly they are getting: the material, the dimensions that are actually controlled, the finish, and the checks that happen before anything is packed.

The waterproof version version exists because the duty cycle on rental motorcycles is not the same as on a showroom vehicle. Where the two are specified identically, something fails later — usually a specification nobody had written down.

Racing Crankshaft Components

Example specification

ItemRacing Crankshaft Components
ApplicationRental Motorcycles
VersionWaterproof Version
Base materialCarbon Steel
Controlled dimensions5 key dimensions, recorded per lot
Tolerance band±0.2 mm
Finishanodised
MOQ200 pieces per specification
Sampling7 working days, 3 days per revision
ComplianceISO 9001

How the example is built up

  1. Start from the duty cycle, not from the catalogue photograph.
  2. Fix the base material in writing — Carbon Steel, in this example.
  3. List the dimensions that are actually controlled and the tolerance on each.
  4. Name the finish and what it has to survive.
  5. State the inspection level and who pays when a lot fails.

Racing Crankshaft Components example

Processes involved

  • injection moulding
  • robot welding
  • die casting
  • cold forging
  • CNC machining
  • shot blasting

Where this example applies

Programmes that run waterproof version most often specify this build for rental motorcycles. Related applications include export programmes, rental motorcycles, camper conversions, fleet maintenance, trailer axles.

Checks before packing

  • Dimensional report against the approved drawing.
  • AQL 1.5 sampling on the finished lot.
  • Finish inspection under agreed lighting.
  • Carton drop test on the first lot of a new packing specification.

Questions buyers ask

How long does sampling take?

Samples leave the factory in 7 working days, and each revision round adds about 3 days once you have seen the first piece.

What is the minimum order quantity?

The standard MOQ is 200 pieces per specification. Mixed sizes inside one shipment are accepted once the total reaches that figure.

Do you handle mixed containers?

Yes. Most programmes consolidate several part numbers into one container to keep freight sensible at 200 pieces per line.

Can the specification be held on file?

Yes. Once approved, the specification is recorded against your part number so a reorder reproduces the ISO 9001-compliant build instead of a fresh interpretation.

Send the part number, the annual volume and the target market, and we will come back with a specification and a sampling plan.

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