66864 Brake Drum | 66864B 16.5×7 Outboard Mount Truck Brake Drum

Product Overview

The 66864 Brake Drum, commonly listed as 66864B or 66864F, is a heavy-duty brake drum designed for North American truck, trailer and drive axle applications. It is widely used as a replacement brake drum for 16.5" × 7" drum brake systems.

This brake drum is designed for outboard mount applications and is suitable for heavy-duty commercial vehicles, including semi-trucks, trailers, tractors and fleet vehicles. Made from high-strength cast iron, it provides stable braking performance, reliable heat dissipation and long service life under demanding road and load conditions.

It is suitable for truck parts distributors, trailer parts suppliers, fleet maintenance companies, repair workshops and commercial vehicle spare parts importers.

Before ordering, please confirm the part number, brake size, mounting type, pilot diameter, bolt circle diameter and original sample to ensure correct fitment.

Vehicle Compatibility

Compatibility Notice:
66864 brake drum is commonly used for 16.5" × 7" heavy-duty drum brake systems. Actual compatibility may vary according to axle brand, hub type, wheel-end configuration and vehicle model. Please confirm by part number, dimensions or sample before ordering.

Technical Specifications

The commonly listed technical data for 66864B includes 16.5" × 7" brake size, 10 holes, approx. 8.78" pilot diameter, 11.25" bolt circle diameter, 10.52" overall depth and about 109 lbs weight. Road Choice’s brake drum catalog also lists a comparable 16.5" × 7" drum cross-reference with 8.78" pilot, 11.25" bolt circle, 10 holes and 1.08" bolt hole size.

Cross-Reference & Interchange

FinditParts lists Webb 66864B cross references including Gunite 3600AX, Mack 8161808, Meritor 85123207002, Navistar W66864B, Stemco 600004HD and Walther EMC 13-00043. Road Choice’s catalog also cross-references 66864B with 3600AX, 85123207002, 10009830, 60001-018, DB1657BSTW, ABP N42A1657B, OTR1601B and DU60793D.

Interchange Notice:
Cross-reference numbers are provided for reference only. Before replacement, please compare the brake size, pilot diameter, bolt circle diameter, bolt hole quantity, bolt hole diameter, overall depth and mounting type.

Key Benefits

1. Common 16.5" × 7" Heavy-Duty Brake Drum

66864 is a popular brake drum size for heavy-duty truck and trailer applications, making it suitable for distributors serving the North American commercial vehicle market.

2. Outboard Mount Design

The outboard mount structure is suitable for common heavy-duty wheel-end configurations and supports efficient replacement during brake system maintenance.

3. Heavy-Duty Cast Iron Construction

Made from durable cast iron material, the drum is designed to withstand repeated braking, heavy loads and long-distance transport conditions.

4. Stable Braking Performance

The precision-machined braking surface helps provide proper contact with brake linings, supporting smooth and consistent braking.

5. Good Heat Dissipation

The cast iron structure helps absorb and release braking heat, reducing the risk of brake fade, overheating and premature deformation.

6. Wide Cross-Reference Coverage

With common references such as 66864B, 3600AX, 85123207002, 10009830 and DB1657BSTW, this brake drum is easy for distributors and repair shops to identify and source.

7. Export-Ready Supply

We support bulk orders, pallet packing, mixed-model shipment and customized customer-brand packing for overseas distributors and fleet customers.

8. Pre-Shipment Quality Inspection

Dimension checking, surface inspection, bolt hole inspection, pilot bore inspection and packing inspection can be arranged before shipment to reduce after-sales risk.

Frequently Asked Questions

FAQ

Q1: What is the product name of 66864?

66864 is commonly known as a 16.5" × 7" Heavy-Duty Brake Drum for truck and trailer applications.

Q2: Is 66864 the same as 66864B?

In most aftermarket listings, 66864B is the commonly used complete part number for the balanced version of the 66864 brake drum. Some listings may also use 66864F for related versions.

Q3: What brake size is 66864?

The common brake size is 16.5" × 7".

Q4: Is this brake drum outboard mount or inboard mount?

66864B is commonly listed as an outboard mount brake drum.

Q5: How many bolt holes does this brake drum have?

This model is commonly listed with 10 bolt holes.

Q6: What are the main dimensions of 66864 brake drum?

Commonly listed dimensions include approximately 16.5" drum diameter, 7" brake width, 8.78" pilot diameter, 11.25" bolt circle diameter, 10.52" overall depth and 10 bolt holes.

Q7: What is the weight of 66864B?

Public aftermarket listings commonly show the weight at approximately 109–112 lbs, depending on the version and supplier.

Q8: Can 66864B replace Gunite 3600AX?

Many cross-reference catalogs list 66864B and Gunite 3600AX together. However, replacement should always be confirmed by exact dimensions and wheel-end configuration.

Q9: What information should I provide before ordering?

Please provide the part number, brake size, axle model, hub type, original brake drum photos, key dimensions or a sample. This helps us confirm the correct product and avoid wrong delivery.

Q10: Can you provide customized packing?

Yes. We can provide pallet packing, wooden case packing, neutral packing and customized customer-brand packing according to order requirements.