Define a traceable slewing bearing inspection report covering drawing revision, dimensions, raceways, gear, assembly, marking, packing and deviations.
An inspection report should allow a buyer or engineer to determine what was inspected, how it was measured, which requirement applied and which physical bearing produced the result. A list of numbers without drawing revision, serial identity, method or acceptance limits is not a complete quality record.
Document scope should be agreed before production because some evidence requires dedicated samples, witness points or retained data. This guide provides a practical structure for standard supply, first article inspection and drawing-based custom bearings.
Document identity and traceability first
The report header should identify customer, purchase order, part number, drawing number and revision, quantity, bearing serial number, manufacturing order and inspection date. Link each ring to its material heat and relevant process batches. If one report covers multiple units, make clear which results are individual and which are batch evidence.
Revision control is critical. A perfectly measured dimension can still be wrong when compared with an obsolete drawing. Record approved deviations, concessions and change notices beside the affected characteristic so the acceptance path remains visible to future reviewers.
Dimensional and geometric inspection
Report critical outside diameter, bore, height, ring steps, pilot fits, bolt circles, hole sizes, thread details and lubrication-port positions. Geometric controls may include axial and radial runout, parallelism, flatness and gear datum relationships. Identify the measuring equipment and method for characteristics that cannot be understood from a number alone.
Use the drawing tolerance beside each result and state pass or fail without hiding actual values behind a check mark when variable data is required. For large flexible rings, note the support and measurement condition. Free-state readings and restrained assembly readings can differ.
Raceway, gear and assembly evidence
Raceway records can include material, surface hardness, effective case depth, soft-zone control, profile and crack inspection according to the approved plan. The raceway hardening guide explains why these items should remain linked rather than reduced to one hardness value.
For geared bearings, include module, tooth count, measurement-over-pins or other specified tooth-thickness result, runout, hardness and inspection of the hardened pattern when applicable. Assembly evidence may include internal clearance or preload class, rotation torque, seal condition, grease fill and smooth-rotation confirmation.
- Material certificate and heat traceability.
- Critical dimensions and geometric tolerances.
- Raceway heat-treatment and nondestructive-test records.
- Gear geometry, runout and hardness evidence.
- Assembly clearance, torque, sealing and lubrication checks.
- Serial marking, preservation, packing and final photographs.
First article inspection versus routine batch records
A first article inspection normally verifies all agreed drawing characteristics and manufacturing evidence for the initial unit or sample batch. Routine production may use a control plan with defined individual, batch and sampling checks. The customer should approve the transition rather than assume that every future shipment repeats the full first article package.
Sampling must never silently replace inspection of safety-critical or individually traceable characteristics. Define retention time, electronic format, language and whether raw data or only signed reports are required. Witness and hold points must be scheduled early enough to avoid production delay.
Make deviations visible and actionable
A nonconforming value should reference the formal deviation request, technical disposition, rework and reinspection. Do not overwrite the original result. The final pack should allow an auditor to reconstruct what happened and who approved acceptance. Procurement teams can include these expectations in the RFQ engineering package before quotation.
FAQ
Is a certificate of conformity enough?
It may be part of the package, but it does not replace detailed results when the purchase specification requires them.
Should every dimension be measured on every bearing?
The approved inspection plan defines individual, batch and sampling checks based on risk and contract requirements.
Why include drawing revision on the report?
It proves that results were evaluated against the correct approved requirements.
Engineering references
For a drawing-based review, send MERYDOM the application, load cases, dimensions and required documentation. Final selection and service instructions must follow the approved drawing and equipment manufacturer requirements.