Procurement guide
Heavy duty leaf spring rated load and dimensional file review
- Purpose
- Resolve open purchasing questions on rated load and dimensional interfaces for a heavy duty leaf spring before sample or order approval.
Specification Review decision points
Heavy duty leaf spring programs still require dimensional interface checks and product-file review. Use the checklist to separate buyer requests from supplier answers. Overall length, center distance, width, leaf count, load rating and eye diameter must be stated with units before drawings are compared. This page does not claim Leafline Sourcing owns a quality lab, completed factory audits or certified capacity figures.
| Decision point | Buyer / supplier question |
|---|---|
| Requested parameters | State overall length, center distance, width, leaf count, load rating, eye diameter, shackle orientation, hanger spacing when known, and the vehicle or trailer year/make/model with axle identifiers. Include units on every dimensional value and note whether the OE reference is for identification only. |
| Supplier response | Ask the supplier to identify pack model, drawing revision, declared load basis, packing unit and any deviations from the submitted envelope. A catalog photo alone is not a response. Request a supplier declaration that separates new versus remanufactured condition when both are offered. |
| Evidence scope | Match spring drawings, packing lists, sample approval notes and batch traceability identifiers to the exact pack and legal entity quoting. Do not treat a plant quality certificate as proof that a specific leaf heat lot was inspected. Warranty scope and Incoterms belong on the same evidence sheet as destination ZIP code. |
| Unresolved points | Record missing seat clearance data, hardware exclusions, minimum order quantity questions and sample timing before approving a sample or production order. Optional target budget (currency, per-spring or whole-order) and supplier preference remain buyer tradeoffs used to shortlist quotes, not verified ratings. |
When comparing two heavy duty leaf spring proposals, align length, leaf count, load rating, included bushings/shackles and freight basis before any preference shortlist. After scope matches, decide whether a premium, mid-range or budget-friendly preference changes which plant should receive a follow-up sample request.
Complete kit versus individual part disputes belong on this page as well: a heavy duty leaf spring pack with shackles and hangers is not interchangeable with a spring-only line plus later hardware buys. Itemize the BOM before comparing landed cost. If remanufactured packs appear, request remanufacture scope, core charge terms and inspection notes beside any new-pack declaration.
What to send
Rated load target, dimensional envelope, quantity and destination ZIP. Drawing references can follow after contact if files cannot attach here.