Mining
Ball mill girth gears · drive gears · large shafts
Heavy loads, continuous running: tooth-surface and journal wear set the shutdown interval.
June 2025 — ball mill gears delivered to a customer in the Middle East.
Ask about this industryLarge parts,made toyour drawing.
Linyao Machinery is a custom plant in Luoyang, China, producing large gears, shafts and non-standard parts.
We machine to drawing for mining, cement, metallurgy and power.
An 8 m gantry mill and 5 m lathe in-house: one-offs to small batches, with testing at every stage.
One-set-up large parts
8 m gantry · less re-fixturing error
Gears and shafts as a set
Tooth form · lead · journal datum
Inspection ships with the part
UT · hardness · tensile
8 m
CNC gantry machining center
5 m
Horizontal lathe
6
Industries served
In-house
UT · hardness · tensile
In Luoyang,
drawings become parts.
Linyao Machinery designs and manufactures large mechanical parts and non-standard components to customer drawings: gears, gear shafts, shafts, sprockets, mining parts, bearing housings, bearings, castings and forgings, and hydraulic cylinders.
From one-off prototypes to small-batch delivery, material, heat treatment, machining and inspection run under one roof; export parts are rust-proofed and packed for their destination. We work to drawings or samples, and can agree a drawing with you against the operating conditions.
ContactTom Zhang+86 187 3757 7920Emailzhang@lylyjx.cn
Get a quote and lead timeFactory addressNo. 56 Factory, South Exit of Shuangxiang Road, Luoyang, Henan, China
Drawing, material, tolerance — align all three, and the part fits.
Six industries.
One standard.
Mining, cement, metallurgy, power, petroleum, sugar — the parts differ, but drawing review, process planning and inspection records follow the same standard.
Cement
Rotary kiln girth gears · tyres · support rollers
Large diameter, low speed: heat treatment and geometric tolerance decide long-term stability.
Metallurgy & steel
Mill gear shafts · couplings · castings and forgings
High impact loads: from forging inspection to tooth-surface hardening, everything is done in-house.
Power
Coal mill gears · fan shafts · bearing housings
Long runs: shaft alignment and bearing fits are checked item by item against the drawing.
Petroleum
Drilling and production shafts · hydraulic cylinders · non-standard parts
Complex conditions: material, sealing surfaces and thread accuracy follow the customer standard.
Sugar
Mill drive gears · transmission shafts · ring gears
High torque and aggressive corrosion: tooth-surface treatment and coating are planned together.
Beyond these industries, our parts also run in petroleum, cement, steel, power and sugar plants. For unusual parts we can measure a sample or reproduce it from a sample: material and working conditions first, then the process.
Capability,
listed machine by machine.
Parts we machine
Gears · shafts · castings and forgings · custom, all quoted from the drawing
8 m gantry, 5 m lathe, gear hobbing and shaping, induction hardening, plus a complete inspection and test lab. Critical operations stay in-house, so we control lead time and quality.
8 m
CNC gantry machining center
Maximum part size
confirmed with the drawing and fixturing plan
Large parts are roughed and finished in the same workshop. Gantry mills, horizontal lathes, boring machines and machining centers are scheduled by operation, cutting the datum errors that come from moving between shops.
- 8 m CNC gantry machining center
- 8 m CNC gantry mill
- 5 m horizontal lathe
- 4 m CNC gantry mill
- 2.5 m CNC gantry mill
- 1160 machining center
- CNC horizontal boring machine
- CNC wire EDM
- Large band saw
- Large horizontal lathe
- CNC vertical lathe
Drawings, samples and non-standard fabrications welcome. If a part exceeds our current fixturing envelope, we review the process before quoting.
Gears and heat treatment
View details- Gear hobbing machineby module and accuracy grade
- Gear shaping machineinternal / herringbone teeth
- Induction hardeningcase hardness and distortion control
Gears and shafts are machined as a set: tooth form, tooth lead and journal datums checked in one set-up.
Inspection and testing
View details- Ultrasonic flaw detector
- Hardness tester
- Tensile testing machine
- Impact testing machine
- Impact notch projector
- Laboratory
Material verification, in-process checks and final inspection records ship with the part. English reports are available for export orders.
Pick a part, see the route
Choose a part type to see a typical process route, key machines and inspection points. The final route follows the drawing review.
Quote this processFrom forging to tooth-surface hardening, shaft and tooth accuracy close on the same line.
Cutting and forging
machining allowance per drawing
Rough turning
horizontal lathe
Quenching and tempering
machinability and toughness
Finish turning
journal concentricity
Hobbing / shaping
per module and accuracy grade
Induction hardening
tooth-surface hardness
Grinding
journals and tooth flanks
Inspection and dispatch
UT · hardness · dimensions
Key machines
Horizontal lathe · Gear hobbing machine · Gear shaping machine · Induction hardening · Grinding machine
Inspection
Ultrasonic testing · Hardness testing · Dimensions and geometric tolerance
Materials and matching parts: castings, forgings, bearing housings, bearings, sprockets, hydraulic cylinders. We can source and verify to your specified grade and standard.
Discuss your partIt has to mesh
before it turns.
Gears are not made one at a time. Module, tooth count and centre distance have to agree before a pair runs smoothly. Linyao machines gears and shafts as a set, checking tooth form, tooth lead and journal datums in the same set-up.
- Teeth
- 40 / 16 / 26 / 12
- Module
- 4
- Centre distance
- 112 mm
- Tooth surface
- Induction hardened 50–55 HRC
Illustrative train, shown to explain the drive ratio; actual parameters are confirmed from the drawing.
Illustrative train · module 4 · teeth 40 / 16 / 26 / 12Drag any gear; the train turns at the tooth ratio
From a drawing
to a crate on the dock.
What happens after you ask for a price, laid out plainly: five stages, each with something we hand over and something you confirm.
- 01
Requirements
Drawings, material, quantity and date reviewed before anything else: whether we can make it, how, and what we would change.
Handover
Feasibility note · Quotation
- 02
Process review
Routing, workholding and key operations fixed; gauges and inspection points listed, acceptance criteria written into the review.
Handover
Routing sheet · First-article plan
- 03
Production
Rough machining, heat treatment and finishing scheduled in sequence, with photo records at key stages and progress on request.
Handover
Traveler · Stage records
- 04
Inspection
Dimensions and geometric tolerances checked to drawing; UT, hardness or tensile retests on material. Nothing ships on a fail.
Handover
Inspection report · Material cert
- 05
Packing & shipping
Rust protection, bracing and shipping marks to destination rules; FCL, LCL or out-of-gauge, shipped the way you specify.
Handover
Packing list · Shipping documents
Quotation
A complete drawing set is enough to evaluate; where something is missing we confirm by mail or call first.
First article
A first-article record before the batch, with a sample part when you want one.
Documents
Packing list, material certificate, inspection report; English versions for export orders.
Freight
FCL, LCL or out-of-gauge, quoted to your port and trade term.
The next drawing
starts here.
Send the drawing, material, quantity and delivery date. We reply within one working day with process feasibility, price and scheduling.
+86 187 3757 7920
Tom Zhang
zhang@lylyjx.cnWhatsApp · same as phone
No. 56 Factory, South Exit of Shuangxiang Road, Luoyang, Henan, China
Reply within one working dayDrawings or samplesOne-offs · small batches
Drawings
PDF, DWG or STEP; a hand sketch is fine to start the conversation.
Key parameters
Material, module and tooth form, accuracy grade, heat treatment.
Delivery
Quantity, required date and destination; tell us the packing needs for export.