45 steel

45 Steel Chrome-Plated Linear Shaft

Chrome-plated shafting for linear motion and guidance, with bearing fit, straightness and end details confirmed against the drawing.

SPECIFICATIONS

45 Steel Chrome-Plated Linear Shaft: standard specification

Standard specification. Other sizes, tolerances and chrome layers are quoted against your drawing.

Grade	Grade 45 to GB/T 699-2015 · comparable, for reference only: C45, S45C, SAE 1045
Diameter	Ø4–130 mm
Tolerance	0/−0.02 mm typical for linear bearings; other bands reviewed against your drawing
Hardness	Induction-hardened case ≥ HRC55, ≈ 2 mm deep
Hard chrome	20–30 μm per side, up to 50 μm on request
Surface roughness	Ra ≤ 0.4 μm
Straightness	≈ 0.1 mm/m from Ø25 · ≈ 0.2 mm/m below Ø25
Length & cutting	Standard 1 m; CNC saw cut to length (≈ 3 mm allowance), ends left as sawn
Certificates & testing	Steel mill certificate for each heat, forwarded unaltered; foreign grades named here are for reference only; third-party test reports on request

TYPICAL APPLICATIONS

Linear-motion systems; Guidance and sliding fits; Automation-equipment shafting.

SELECTION NOTE

Do not select by diameter alone when bearing fit, straightness, end geometry or working-surface requirements are not yet defined.

PROCESS ROUTE

Dashed steps are done by long-term partner plants to Yixin's specification; all others run in the Yixin workshop.

Yixin workshopLong-term partner plant, to Yixin's specificationAll products can be CNC-sawn to length

RELEVANT PROCESS CAPABILITY

010.02 mmtolerance band to drawing

0220–30 μmchrome per side, to 50 μm

03HV800+chrome hardness capability

Typical process capability. Final values for each size are fixed on the confirmed drawing, specification and order.

TECHNICAL GUIDES

SERVICE

How standard orders are handled. Volume and special requirements are written into the quotation.

Minimum order: 1 t per order; 20–50 kg sample orders available
Lead time: Cut-to-length from stock 3–5 days · non-standard diameters 7–10 days · custom heat treatment 10–20 days, plus sea-freight booking
Trade & payment: FOB Shanghai or Ningbo · T/T
Packing: Protective film, steel-strapped bundles, wooden cases or pallets for sea freight
Documents: Commercial invoice, packing list and mill certificate; certificate of origin arranged per order; third-party inspection on request
Response: Quotation reply within one working day

Send diameter, length, quantity or a drawing. We reply with grade, tolerance, chrome thickness and lead time.