WS39 casing tooth
JM cutter tooth
B47K22 bullet toothA roller-bit inspection file should identify the cone and leg, record their mating dimensions, and connect assembly checks to the delivered parts. Agree the required records with the order.
Measure both sides of the bearing fit
Measure the large and small journal diameters on the leg and the corresponding bores in the cone. Record each feature against its drawing limit before closing the assembly.
The photograph shows the machined cone bores. Measured dimensions and acceptance limits belong in the inspection sheet.
What to record at each stage
| Component / stage | Check | Record |
|---|---|---|
| Finished leg | Large and small journals, reference-face distances, ball groove and surface finish. | Dimensions in mm, drawing limits, measurement method and specified surface-finish result. |
| Finished cone | Large and small bores, ball groove, seal recess and reference-face distances. | Bore and seal-seat measurements linked to the matching cone and leg. |
| Heat-treated component | Hardness at the specified location and process stage. | Component, batch, test location, scale, method and readings. Keep HRA, HRC and other scales distinct. |
| Bearing assembly | Journal-to-bore fit and axial movement. | Measured fit or movement, inspection setup and assembly requirement. |
| After lubrication | Consistent cone rotation without sticking. | Cone identity, observation and any corrective action or recheck. |
Keep specified limits separate from actual results. Identify which checks cover every part and which use batch samples.
Keep the record with the matching components
Connect the roller-bit reference to the cone and leg identities, material and heat-treatment batches, and carbide-insert batch. Record the instrument or method used for each inspected feature.
After installation welding, recheck cone movement and retain the mounting record. If a result changes, record the affected position, action and reinspection before drilling.
Match the records to the delivered parts
Agree the required reports and inspection coverage before ordering. At receipt, use the delivery markings and report references to check the connection below. Record what is available; leave an unresolved link marked To confirm.
| Check | What to record | If the link is missing |
|---|---|---|
| Delivered part | Model, drawing revision and the available part or package marking. Keep a photograph of the marking. | Ask which delivered parts the report covers. |
| Component records | Cone and leg identities; report references and the corresponding material or treatment batches. | Request the component-to-batch link, not an unrelated certificate. |
| Measured results | Measured values beside drawing limits, with units, method and test location where relevant. | Request the readings or applicable requirement; a pass label alone does not provide them. |
| Inspection coverage | For each check: every part or a sample; inspected quantity, sample identity and batch covered. | Ask for the agreed scope. A sample result is not evidence that every part was measured. |
Review the supplied pre-assembly measurements; do not dismantle a sealed roller bit simply to repeat the receiving check.
A missing record does not by itself prove a defective part. Identify the unresolved item, retain its marking and photograph, and request clarification against the order requirements.