Cone Crusher Pinion Shaft Housing

Product Introduction

The drawing passes. The assembly fails. This is procurement's worst nightmare.

A common problem with countershaft boxes and pinion shaft housings: it doesn't show on the drawing. It shows at assembly — or weeks after the crusher is back in operation.

The pinion shaft bore and the countershaft box mounting face are machined in separate setups. If the bore is not square to the mounting face, or the two bearing bores are not coaxial, the shaft does not sit in its designed position. The assembly still goes together. The gear still turns. But the gear mesh now runs at the wrong center distance and angle.

The result: one-sided tooth wear, uneven bearing preload, rising vibration, and fatigue at mounting bolts. The crusher may run for weeks, then fail without warning — usually during a production push, when downtime is most expensive.

The root cause is usually not the material. It is the machining setup, the bore-to-face alignment, and the lack of a functional check before shipment.

Our Solution

ZHUOYUE treats bore-to-face alignment as a functional requirement, not just a dimensional one.

What we do:

1. Single-setup machining of critical bore and mounting face; verified datum transfer for larger housings

2. Functional inspection: squareness, coaxiality, center distance measured on CMM or with mandrel and dial indicator

3. Mock-up assembly before shipment: confirms no binding, proper bearing seating, correct gear contact pattern

4. Material and heat treatment matched to load case: 42CrMo / 34CrNiMo6 / ZG270-500, stress relief, hardness recorded

5. Full documentation: material certificate, heat treatment record, dimensional and functional tolerance reports

Value to the Buyer

• Lower risk of a part that fits the drawing but not the machine

• Fewer assembly surprises — mock-up catches issues before shipment

• Longer gear and bearing life — correct mesh and preload

• Traceable quality records for incoming inspection and supplier comparison

The most expensive failure is the one that passes inspection.

Technical Specifications

Product Advantages

1. Functional alignment controlled, not assumed
The drawing may specify bore diameter and face flatness. We additionally control bore-to-face squareness, bore-to-bore coaxiality, and center distance — machined from a verified datum and measured before shipment.

2. Material and heat treatment selected by load case
Grade and heat treatment are confirmed against the original part or drawing, not a fixed catalog spec. Typical grades: 42CrMo, 34CrNiMo6, ZG270-500, or equivalent. Hardness recorded on the finished part.

3. Mock-up assembly check for custom housings
Where mating components can be supplied or approved, we perform a mock-up assembly to confirm shaft seating, bearing seating, gear mesh contact pattern, and mounting face contact. If not possible, a functional tolerance report is provided.

4. Documentation for the buyer's quality system
Material certificate with heat number, heat treatment record, dimensional inspection report, functional tolerance report, and mock-up assembly record — all available with the order.

5. Flexible supply: from 1 piece to annual framework

• Stock / prototype: MOQ 1 piece

• Custom batch: MOQ 30–50 pieces

• Annual framework: reserved blanks, shorter lead time

Product Application

These countershaft boxes and pinion shaft housings are used in cone crusher transmission systems in:

• Hard rock mining: Copper, iron ore, gold, and nickel crushing circuits

• Aggregate quarries: Granite, basalt, and limestone processing plants

• Construction and recycling: Concrete rubble, asphalt, and slag crushing lines

The housing is selected according to the specific crusher model, load case, and operating environment. Material grade, heat treatment, and functional tolerances are confirmed before production.

About Us

ZHUOYUE is built by a core team with over 10 years of hands-on experience in mining machinery and crusher replacement parts. Our background covers process confirmation, manufacturing, and quality inspection for crusher structural components, wear parts, and custom machined parts.

We focus on cone crusher transmission structural parts, including countershaft boxes, pinion shaft housings, dust covers, and seal rings. Fitment and functional tolerances are confirmed against the crusher model, OEM number, drawing, or worn sample before production.

Facility

• Production base of approximately 4,000 m² in Shenyang, Liaoning, China

• 24 R&D and technical staff

• 14 production lines: 10 machining, 2 welding, 2 assembly

• Annual capacity: 2,000 tons per year

• Metal structural components: maximum single-piece processing capacity up to 150 tons

• Full-process production lines covering forging, precision machining, stress relief, surface finishing, and quality inspection

Customers and Export Markets

We serve mining, aggregate, and construction customers in:

• Southeast Asia: Indonesia, Philippines, Vietnam, Malaysia

• Middle East: Saudi Arabia, UAE, Oman

• Africa: South Africa, Zambia, Ghana, Kenya

• South America: Chile, Peru, Brazil

Customer names and project details are shared only with written authorization.

Quality Control and Inspection

Quality inspection is carried out throughout the manufacturing process based on the confirmed drawing and technical requirements.

Incoming Material Inspection

• Raw material composition analysis (spectrometer per GB/T 223 / ASTM E415)

• Material grade verification against the confirmed specification

• Hardness check on incoming material

In-Process Inspection

• Critical dimensional measurement: bore diameter, mounting face flatness, overall dimensions, measured against approved drawing

• Functional tolerance measurement: bore-to-face squareness, bore-to-bore coaxiality, center distance

• Heat treatment parameter verification

• Surface condition inspection: visual check for cracks, voids, and surface finish

Before Shipment

• Final dimensional inspection against the approved drawing

• Functional tolerance report with actual measured values

• Mock-up assembly check where applicable

• Appearance and packaging inspection

• Components that fail dimensional or functional inspection are segregated and reworked or rejected before shipment

Additional Inspection (On Request)

• Material certificate with heat number

• Heat treatment record

• NDT for metal components: UT (ASTM A388 / GB/T 6402), MT (ASTM E709 / GB/T 15822), PT (ASTM E165)

• Inspection records provided in paper or electronic format according to order requirements

Note on NDT: UT, MT, and PT are applicable to metal components. They are not applied to PU elastomer seals.

Note on hardness standards: Brinell hardness (GB/T 231.1) is applicable to metal components. Shore A (ASTM D2240) is used for PU elastomer seals.