Mdt178 Slewing Bearing

1. Product Description: The Mdt178 slewing bearing is a heavy-duty slewing bearing designed specifically for Potain tower cranes. Made of 42CrMo high-strength alloy steel, it features extreme cold-resistant treatment and tooth surface hardening technology, ensuring reliable operation and precise positioning in -45°C environments.
2. Product Structure: Single-row, four-point contact ball slewing bearing
3. Dimensions: 1476*100mm
Machinable Size Range: 50-10,000mm
Customization is available to meet specific size requirements.
4. Materials: Ring Material: High-strength alloy steels such as 50Mn and 42CrMo
Rolling Elements: Balls or rollers made of GCr15SiMn bearing steel

5. Applications:
Precisely matched to machine models
Potain MDT Series: MDT 219, MDT 269

Potain MC Series: MC 85, MC 125

Potain GT Series: GT 185, GT 245
Exporting Country: Russia

Product Description

Mdt178 Slewing Bearing - Slewing Ring for Potain Tower Cranes

Product Details

When your Potain tower crane operates in harsh environments, you need a reliable slewing bearing. The MDT178 slewing bearing is designed specifically for Potain's MDT, MC, and GT series tower cranes. This heavy-duty slewing bearing features a single-row, four-point contact ball design for efficient handling of combined loads. It is constructed from 42CrMo high-strength alloy steel and undergoes extreme cold treatment and tooth surface hardening technology. Whether operating in the frigid Siberian winter or on a typical construction site, this product ensures reliable rotation and precise positioning, even in temperatures as low as -45°C.

The bearing size is 1476 × 100 mm and is a critical rotating connection between the crane's superstructure and base. Its four-point contact design allows it to simultaneously transmit axial loads, radial forces, and overturning moments within a compact and lightweight assembly.

Why Choose Heng Guan Bearing?

Mdt178 Slewing Bearing

Our company is ISO 9001 certified and strictly adheres to international standards such as noise levels, ISO standards, and GB standards. From raw material selection to final inspection, each slewing bearing undergoes rigorous quality control.

Professional Design Team

With over 20 years of experience in bearing innovation, our team of more than 50 R&D personnel focuses on the design and optimization of slewing bearings. We fully understand the specific needs of tower crane applications.

Advanced Production Capacity

We utilize CNC vertical machining centers, CNC cutting machines, CNC forming machines, and precision crushing equipment. This enables us to produce slewing bearings with diameters ranging from 50 mm to 10,000 mm and precision grades from P0 to P4.

Global Service Network

Our products are sold in over 50 countries, including Russia, Germany, the USA, and Australia. We provide technical consultation, installation guidance, and product prototype mapping services to support your global operations.

Flexible Customization Services

In addition to standard products, we also offer non-standard customization services tailored to your specific working conditions.

Technical Specifications

Parameter	Specification
Model	Mdt178
Bearing Type	Single-row four-point contact ball slewing bearing
Dimensions	1476 × 100 mm
Ring Material	42CrMo high-strength alloy steel
Rolling Elements	GCr15SiMn bearing steel balls
Temperature Range	-45°C to standard operating conditions
Surface Treatment	Tooth surface hardening, extreme cold-resistant treatment
Precision Grade	P0, P6, P5, P4 (customizable)
Mounting Holes	Pre-drilled bolt holes for direct mounting
Sealing	Integrated seal design
Lubrication	Pre-lubricated with access points
Compatible Models	Potain MDT 219, MDT 269, MC 85, MC 125, GT 185, GT 245

Certification

Mdt178 Slewing Bearing certification

Features and Benefits

Four-Point Contact Ball Design

This configuration distributes loads across four contact points on each ball. You get superior load capacity in a more compact envelope compared to traditional bearing designs.

42CrMo Alloy Steel Construction

High-strength alloy steel provides excellent resistance to impact loads and fatigue. Your bearing maintains structural integrity even under shock loading during crane operations.

Extreme Cold Treatment

Special metallurgical processing ensures material stability at -45°C. You can operate confidently in Arctic regions, high-altitude sites, and severe winter conditions without brittleness or failure.

Surface Hardening Technology

Hardened raceways and Gear teeth reduce wear rates significantly. This extends service life and maintains rotational accuracy throughout the bearing's operational period.

Pre-Drilled Mounting Holes

Factory-precision holes align perfectly with Potain crane mounting patterns. You save installation time and eliminate field drilling errors.

Integrated Sealing System

Multi-lip seals prevent contamination ingress while retaining lubricant. This protection is especially valuable in dusty construction environments.

Applications

The MDT178 slewing bearing is precisely matched to the following Potan tower crane series:

MDT Series: MDT 219, MDT 269 - Flat-top tower cranes for urban construction sites

MC Series: MC 85, MC 125 - Small footprint mobile construction cranes

GT Series: GT 185, GT 245 - Heavy-duty flat-top tower cranes for large projects

These slewing bearings are widely used in Russian construction projects with extremely high cold-resistance requirements. The equally robust and durable design ensures reliable operation in standard climate zones worldwide.

Besides tower cranes, similar slewing bearing technology is also used in wind turbines, port cranes, and excavators. If you require a customized solution for specific equipment, our engineering team can adapt this proven design to your needs.

Installation Guide

Pre-Installation Inspection

Check all mounting surfaces for levelness and cleanliness. Evacuate burrs, paint, or erosion from jolt gaps and seating surfaces.

Alignment Verification

Position the bearing on the mounting spine. Confirm that jolt gaps adjust without driving. Misalignment shows disgraceful crane preparation.

Bolt Establishment Sequence

Install jolts in a star design, not continuously around the circle. This guarantees indeed stack dissemination and avoids distortion.

Torque Application

Apply jolts to 70% of last torque in the to begin with pass. Total to 100% detail on the moment pass. Utilize a calibrated torque torque and take after Potain's torque specifications.

Rotation Test

Before last get together, physically pivot the bearing through 360°. Development ought to be smooth without official. Unpredictable resistance shows establishment problems.

Lubrication Check

Verify that oil fittings are open and working. Pump new oil until you see slight cleansing from seals.

Exhibition

We attend many famous international exhibitions such as Shanghai International Maritime Exhibition,Mining World Russia, bauma China, CTT Russia, etc

Partners

Your trust, we cherish in heart all times and will reciprocate that trust with unwavering quality.

Packaging & shipping

Your goods are unique, and their journey should be flawless. Therefore, we offer professional and customized packaging services. Our experienced team will evaluate your goods' characteristics, transportation route, and environmental requirements to recommend the most secure solution, such as: wooden crate packaging, sturdy frame packaging, or composite reinforced packaging (wooden crate + iron frame).

Maintenance and Care

Monthly Visual Inspection

Look for oil spillage, seal harm, or mounting jolt detachment. Address any variations from the norm immediately.

Quarterly Lubrication

Apply lithium-based oil through grease focuses. Pivot the bearing amid lubing to guarantee total raceway coverage.

Annual Jolt Torque Check

Re-torque all mounting jolts to determination. Vibration and warm cycling can decrease preload over time.

Rotation Smoothness Monitoring

During operation, tune in for unordinary commotion or feel for harsh spots. These side effects demonstrate defilement or wear requiring investigation.

Seal Astuteness Verification

Damaged seals permit dampness and flotsam and jetsam entrance. Supplant compromised seals expeditiously to anticipate untimely raceway damage.

FAQ

Q: Can this bearing supplant the unique Potain part?

A: Yes. Our item is fabricated to OEM dimensional and execution details for coordinate replacement.

Q: What is the anticipated benefit life?

A: Beneath legitimate support and typical working conditions, anticipate 8,000-12,000 working hours. Cruel situations may diminish this period.

Q: Do you supply heading for other tower crane brands?

A: Completely. We fabricate slewing orientation for Liebherr, Zoomlion, XCMG, and other major brands. Contact Us with your crane model.

Q: Can you customize measurements for adjusted cranes?

A: Yes. Give your mounting measurements and stack necessities. Our engineers will plan a custom arrangement inside our 50-10,000mm fabricating range.

Q: What documentation do you provide?

A: Each bearing ships with dimensional review reports, fabric certifications, and establishment informational. ISO9001 and RoHS compliance documentation is accessible upon ask.

Contact Us

For technical specifications, quotations, or custom Mdt178 Slewing Bearing solutions, reach our engineering team at mia@hgb-bearing.com. We respond within 24 hours with expert guidance.

WHAT OUR CUSTOMERS SAY

Here is the customer's evaluation of us

From Europe

As a leading construction machinery manufacturer in Europe, we are very impressed with the quality and performance of your slewing rings. The precision machining and consistent quality meet our strict standards. A reliable global supplier!

From United States

Our CT scanners require extremely smooth rotation, low noise, and no magnetic interference. Your product perfectly meets these requirements, operating virtually silently without compromising image quality. Your technical expertise is truly impressive!

From Southeast Asia

We have been the distributor of your brand for many years and have received excellent customer feedback. Your diverse product line meets diverse customer needs, and our consistent quality makes us very competitive in the market. Your technical support and service team are also fantastic!

From United States

The slewing bearing selected for our wind turbine main drive system has exceeded our expectations in terms of precision and reliability. It operates smoothly even in extreme wind conditions and has a long maintenance cycle, significantly reducing our lifecycle costs. We are a trustworthy partner!

From the Middle East

Our equipment required a slewing bearing with non-standard dimensions and special gears. We contacted several companies but they all said they couldn't make it. Not only did you accept the order, but we also communicated smoothly throughout the entire process from proofing to mass production, and the finished product fully met our design requirements. This customization capability demonstrates your true technical strength.

From Europe

We have integrated your slewing rings into our new line of crawler cranes. The performance under full load and in extreme weather conditions has been flawless. The precision and durability meet the highest European standards. A truly reliable component for critical applications.

From North America

The harsh, sandy environment of our port is a true test for any equipment. Your slewing bearings' superior sealing system has effectively kept out abrasive contaminants. Our ship-to-shore cranes have seen a dramatic increase in uptime and service life since switching to your brand.

From the Middle East

In the mining industry, equipment failure is not an option. The immense strength and robust construction of your large-diameter slewing bearings have withstood the incredible shocks and loads in our mining excavators. Their reliability is directly contributing to our productivity.