Can you manufacture from our OEM drawings?

Yes — production to customer drawings is the normal mode, under NDA where required. If only a worn part is available, reverse-engineering with a verification drawing for your approval is offered.

What information is needed to quote a bearing chock?

The chock drawing (or sample), material grade, bearing bore tolerance and surface finish, quantity, and whether machining datums or wear plates are included. A stand assembly drawing helps confirm fits.

What HS code applies to mill spare parts?

Parts of metal-rolling mills other than rolls — chocks, shafts, guides, spindles — are generally classified under HS 8455.90; rolls themselves fall under HS 8455.30.

Products /Mill Components

Rolling Mill Spare Parts

Name: Rolling Mill Spare Parts
Brand: Core Steel Works

Rolling mill spare parts are the machined components that keep a mill stand running: bearing chocks, gear shafts, sizing, reducing and straightening rolls, spindles, couplings and guides. Supplied to customer drawings from forged or cast blanks with heat treatment, precision machining and NDT, they are classified under HS 8455.90 as parts of metal-rolling mills.

HS 8455.90EN 10204 3.1 MTCISO 9001

Reference Specification

Rolling Mill Spare Parts — reference data
Part types	Bearing chocks, gear shafts, sizing/reducing/straightening rolls, spindles, couplings
Max weight	Up to 40 t machined
Blank form	Open-die forging or steel casting per part
Machining	Turning, milling, boring, grinding to drawing tolerance
Inspection	UT/MT/PT as specified, hardness, CMM dimensional report, MTC 3.1

Materials

· 42CrMo / 34CrNiMo6 forged steel
· ZG270-500 and alloy cast steels

Rolling Mill Spare Parts — product photo — photo pending

RFQ Checklist

Include this in your inquiry for a fast, accurate quote

01Part drawings with materials, tolerances and surface finishes
02Blank form preference (forged/cast) if specified by your OEM
03Quantity per item and criticality/lead-time expectations
04NDT scope and acceptance criteria
05Assembly or match-machining requirements
06Documentation package required

Send RFQ / Upload Drawing

Buying spares direct from the machining source

Mill operators typically pay OEM list prices for parts that are, materially, a forged blank plus precision machining plus documentation. Sourcing the same drawing from the manufacturing base in Jiyuan — with the same NDT scope and a 3.1 certificate — is where the economics work, especially for chocks, shafts and roll classes outside the OEM’s own foundry.

What to send for a fast quote

Useful RFQs include the part drawing, material and hardness spec, NDT scope and quantity. Where drawings cannot be released, a sample part or a sketch with key dimensions is a workable starting point.

Frequently Asked Questions

Can you manufacture from our OEM drawings?: Yes — production to customer drawings is the normal mode, under NDA where required. If only a worn part is available, reverse-engineering with a verification drawing for your approval is offered.
What information is needed to quote a bearing chock?: The chock drawing (or sample), material grade, bearing bore tolerance and surface finish, quantity, and whether machining datums or wear plates are included. A stand assembly drawing helps confirm fits.
What HS code applies to mill spare parts?: Parts of metal-rolling mills other than rolls — chocks, shafts, guides, spindles — are generally classified under HS 8455.90; rolls themselves fall under HS 8455.30.