Drawing
Define the geometry.
Send a dimensioned drawing where possible. Identify bore, bearing OD, width, flange or groove geometry, tolerances and any dimensions that cannot change.
Custom bearing engineering
Develop a non-standard bearing from a drawing, current sample or assembly requirement. Dimensions, material, closure, precision, noise, clearance and lubrication are reviewed before feasibility, sampling and commercial terms are confirmed.
What can be reviewed
Dongsheng reviews non-standard projects against the complete application. Every option remains subject to engineering feasibility, sample validation and the confirmed quotation.

Drawing
Send a dimensioned drawing where possible. Identify bore, bearing OD, width, flange or groove geometry, tolerances and any dimensions that cannot change.
Operating conditions
Include speed, radial and axial load, shaft and housing fits, temperature, contamination or moisture exposure, duty cycle and target service life.
Project scope
State prototype quantity, expected annual volume, validation requirements and target schedule. MOQ, tooling and lead time are confirmed after review.
OEM workflow
Provide a dimensioned drawing, an existing sample or the current model reference.
Share speed, load, fits, temperature, environment, duty cycle and the performance target.
Dimensions, material, closure, precision, noise, clearance and lubrication are aligned.
Tooling, minimum order quantity, sample plan, lead time and commercial terms are confirmed for the specific project.
Samples are prepared only after the specification and commercial terms have been agreed.
The sample is checked against the agreed requirements and evaluated in the actual assembly.
Approved requirements are transferred into the production, inspection and packaging plan.
Start engineering review
PDF, DWG, DXF, STEP, IGES, JPG and PNG files are accepted up to 4 MB. Email larger files to 490684455l@gmail.com. A drawing is preferred, but a model reference and clear sample photos can start the review.