You are here: Home » Products » Steel Ball Manufacturing Equipment » 3ML4780D Vertical Steel Ball Lapping Machine

3ML4780D Vertical Steel Ball Lapping Machine for φ3–25 mm Precision Balls

Steel Ball Grinding Machine | Bearing Ball Lapping Machine | Grinding Media Ball Machine | Steel Ball Production Equipment Manufacturer

3ML4780D Vertical Steel Ball Lapping Machine

3M7480 Vertical Steel Ball Grinding Machine

The RISHENG 3ML4780D Vertical Steel Ball Lapping Machine is designed for finishing and superfinishing φ3–25 mm steel balls after hard grinding. It offers a 250 kg loading capacity, 60 kN maximum working pressure, and 10–40 r/min adjustable spindle speed for stable batch production.
Its vertical compact structure combines hydraulic loading, constant-pressure locking and mechanical pressure retention. With rotating-plate runout controlled within 0.015 mm, the machine supports consistent lapping of bearing steel, stainless steel and alloy steel balls.
As a steel ball lapping machine manufacturer in China, RISHENG provides equipment selection, process matching, export packaging and after-sales technical support.

Request a Quick Quote

3ML4780D Vertical Steel Ball Lapping Machine Technical Specifications

Item	Parameters
Equipment category	Rolling-element equipment — vertical steel ball lapping machine
Machine type	Vertical steel ball lapping / superfinishing machine
Applicable process	Finishing lapping or super lapping after hard grinding
Working ball diameter	φ3–φ25 mm
Lapping plate dimensions (D × d × h)	800 × 440 (360) × 100 mm
Resin grinding wheel dimensions (D × d × h)	800 × 440 × 30 (50) mm
Maximum working pressure	60 kN
Maximum ball load	250 kg
Main spindle speed	10–40 r/min
Main motor power	5.5 kW
Machine orientation	Vertical
Ball-plate movement guide	Guide rod
Pressure system	Hydraulic pressurization

Contact Our Support Team

3ML4780D Vertical Steel Ball Lapping Machine Structure and Working Features

Compact Vertical Large-Cycle Lapping Structure
The 3ML4780D adopts a vertical layout and large-cycle processing method. Its compact machine structure reduces the required floor area, making it easier to integrate with existing grinding, washing, inspection and sorting equipment.

Hydraulic Pressure with Mechanical Pressure Retention
Hydraulic pressure supplies the required working force, while a constant-pressure nut and compression-spring structure mechanically retain the pressure. This design helps reduce pressure fluctuation and maintain consistent contact between the steel balls and working plates during the lapping cycle.

High-Precision Spindle and Rotating Plate
The high-precision spindle structure is engineered for stable low-speed finishing. End-face and radial runout of the rotating plate are controlled within 0.015 mm, helping create stable mechanical conditions for improved ball roundness, dimensional consistency and surface finish.

Oil-Mist-Lubricated Spindle Bearing
The spindle bearing uses oil-mist lubrication to support continuous and reliable machine operation. Correct lubrication also helps reduce wear and maintain spindle performance during long production cycles.

Guide-Rod Ball-Plate Movement System
The ball-plate movement uses a guide-rod structure. Controlled guidance helps keep the working components aligned during pressurization and operation, supporting stable lapping contact across the production batch.

Adjustable 10–40 r/min Lapping Speed
The 10–40 r/min spindle-speed range allows operators to match processing conditions with ball size, material hardness, incoming surface, lapping compound and target finish. Final parameters should be established through process trials rather than using one setting for every ball type.

Contact Our Team

NOT SURE WHICH STEEL BALL GRINDING OR LAPPING MACHINE IS RIGHT FOR YOU?

Get Machine Recommendation

Steel Ball Lapping Machine for Bearing Balls and Precision Balls

Chrome steel bearing balls: AISI 52100 / GCr15 balls for rolling bearings, ball screws, linear guides and precision mechanical assemblies;
Stainless steel balls: hardened stainless steel balls for bearings, valves, pumps and corrosion-resistant precision components;
Alloy steel balls: wear-resistant spherical components requiring controlled size, roundness and surface finish;
Precision valve and machinery balls: spherical components used in fluid-control and mechanical systems;
Small precision grinding media balls: batches that require improved roundness and surface finish beyond the hard-grinding stage;
OEM precision steel ball production: customized processing for different materials, diameters, tolerances and capacity targets.

Send Us Your Inquiry Today

Know Detailed Information

Please Download Catalogue Here

Steel Ball Lapping Machine for Bearing Balls and Precision Balls

Process	Main Purpose	Recommended Machine
Hard grinding	Removes the main allowance and corrects ball size after heat treatment	3M7480 Vertical Steel Ball Grinding Machine
Lapping / superfinishing	Improves roundness, diameter consistency and surface finish after grinding	3ML4780D Vertical Steel Ball Lapping Machine

The 3ML4780D is a downstream steel ball superfinishing machine, not a replacement for hard-grinding equipment. For a matched solution, view the 3M7480 Vertical Steel Ball Grinding Machine or explore our Steel Ball Manufacturing Equipment.

Why Choose RISHENG as Your Steel Ball Lapping Machine Manufacturer

Steel Ball Production and Process Experience
Founded in 2006, RISHENG has long-term experience in steel ball manufacturing processes, including grinding, lapping, polishing and inspection. This production background helps our team evaluate the machine together with the ball material, incoming quality and target result.

Grinding-to-Lapping Equipment Support
Customers can source the 3M7480 grinding machine and 3ML4780D lapping machine through one supplier. RISHENG supports process matching between hard grinding and final lapping to reduce equipment-selection errors.

Factory-Direct Configuration and Export Service
As a China steel ball lapping machine supplier, RISHENG provides technical proposals, electrical configuration, optional tooling and spare parts, export packaging, shipping coordination and remote service support according to the contract.

Machine Testing Before Shipment
Before delivery, the machine is checked for spindle rotation, speed adjustment, transmission, pressure control, electrical functions and general operating condition. Test photos or videos can be provided according to the agreed acceptance plan.

Contact Our Support Team

Packaging & Delivery of 3ML4780D Vertical Steel Ball Lapping Machine

1. Pre-Shipment Inspection and Test Run
Before delivery, the 3ML4780D Vertical Steel Ball Lapping Machine is inspected and test-operated. The spindle, hydraulic system, pressure mechanism, electrical controls and general operating condition are checked according to the confirmed configuration.

2. Machine Cleaning and Anti-Rust Treatment
After inspection, the machine is thoroughly cleaned. Exposed metal surfaces, lapping plates and other key components are treated with anti-rust oil to reduce the risk of corrosion during storage and international transportation.

3. Components and Accessories Securing
Moving parts and vulnerable components are fixed to prevent displacement during transit. Tools, spare parts, technical documents and optional accessories are checked against the packing list and packed separately where necessary.

4. Moisture-Proof Protective Wrapping
The machine is covered with protective film and moisture-resistant materials. Additional padding and desiccants can be used to protect electrical components and precision parts from moisture, dust and vibration.

5. Export-Standard Machine Packaging
The vertical steel ball lapping machine is packed in a reinforced export-standard wooden case or secured on a suitable transport frame. Packaging labels, lifting points and handling instructions are clearly marked for safer loading and unloading.

6. Container Loading and International Delivery
RISHENG coordinates container loading, packing documents and shipment according to the agreed trade terms. Loading photos and shipping information can be provided to help customers track the 3ML4780D steel ball lapping machine until it reaches the designated port or destination.

Contact Our Support Team

RISHENG Steel Ball Lapping Machine Service Process

As a professional vertical steel ball lapping machine manufacturer, RISHENG provides project support from machine selection and production to delivery and after-sales service.

1

Requirement and Process Evaluation

Send the ball material, diameter, incoming condition, required grade, surface finish and production capacity. RISHENG evaluates whether the 3ML4780D is suitable.
2

Technical & Production

After configuration confirmation, RISHENG provides the specification, scope of supply, delivery schedule and quotation, then arranges manufacturing and machine testing.
3

Delivery and After-Sales Support

The machine is export-packed and shipped. Installation guidance, commissioning support, operator training and spare-parts service are provided according to the contract.

Quality Certification

FAQ of 3ML4780D Steel Ball Lapping Machine

Q Can the 3ML4780D lap stainless steel and alloy steel balls?

A The machine can be evaluated for hardened stainless steel, bearing steel and alloy steel balls. RISHENG will confirm the lapping plates, abrasives and process parameters according to the specific material and target finish.
Q What is the difference between a steel ball grinding machine and a lapping machine?

A A grinding machine removes more material and corrects ball size and geometry after heat treatment. A lapping machine uses finer finishing conditions to further improve roundness and surface quality. The two machines perform different stages of steel ball production.
Q What are the lapping plate and resin grinding wheel dimensions?

A The standard lapping plate dimensions are 800 × 440 (360) × 100 mm, while the listed resin grinding wheel dimensions are 800 × 440 × 30 (50) mm. RISHENG will confirm the applicable working plate or wheel configuration for the customer's process.
Q What are the maximum load and working pressure of the 3ML4780D?

A The standard maximum ball load is 250 kg, and the maximum working pressure is 60 kN. Actual batch load and operating pressure should be set according to the ball diameter, material, plate condition and approved lapping process.
Q What steel ball sizes can the 3ML4780D lapping machine process?

A The standard working range is φ3–25 mm. Suitability must still be confirmed according to the ball material, hardness, incoming grinding condition, lapping allowance and required precision.
Q What is the 3ML4780D vertical steel ball lapping machine used for?

A It is used for finishing lapping or superfinishing steel balls after hard grinding. The process is intended to improve ball roundness, diameter consistency and surface finish before final inspection and sorting.

3ML4780D Vertical Steel Ball Lapping Machine for φ3–25 mm Precision Balls