How does the expansion shell anchor work?

As the bolt is tightened by the installation drill, the expansion shell expands and the bolt tightens, holding the rock together. A sharp pull seats the anchor, and tightening increases the anchor force.

What is the surface treatment finish?

The surface treatment is Sand Blast, and the finish is Oil Rusty.

What are the payment terms?

We accept LC (Letter of Credit) and T/T (Telegraphic Transfer) as terms of payment.

M20 M16 Mechanical Roof Bolts with Expansion Shell for Underground Mining

Name: M20 M16 Mechanical Roof Bolts with Expansion Shell for Underground Mining
Brand: Ningbo Supreme Machinery Co., Ltd.
SKU: 2132615145

Zhejiang, ChinaNingbo Supreme Machinery Co., Ltd.

US$0.98

100 Pieces

Product profile

Customization

Available

After-sales Service

12 Months

Warranty

12 Months

Model NO.

SP9842

Certification

CE, RoHS, ISO 9001:2000, ISO 9001:2008

Standard

AISI, ASME, BS, ANSI, JIS, GB, ASTM, DIN

Surface Treatment

Sand Blast

Manufacturing Process

Casting+Forging+Stamping+CNC Machining+Welding

Material

Ductile Iron, Steel

Item Name

Expansion Shell Anchor Bolt

Application

Mining Industry

Size

as Per Drawing

Diameter

35-38

Finish

Oil Rusty

QC

100%

Transport Package

Wooden Case

Specification

Customized

Trademark

Origin

China

HS Code

8486909000

Production Capacity

80, 000 PCS Monthly

Key features

Multi-Standard Compliance: Certified under CE, RoHS, ISO 9001:2000, ISO 9001:2008, AISI, ASME, BS, ANSI, JIS, GB, ASTM, and DIN.

Robust Manufacturing Process: Constructed via Casting, Forging, Stamping, CNC Machining, and Welding for high durability.

Customizable Dimensions: Size and diameter (35-38mm) can be customized according to specific customer drawings.

100% Quality Control: Every item undergoes strict 100% quality inspection before shipment.

Effective Rock Support: Expansion shell design tightens and holds rock together when bolt is tightened by installation drill.

Versatile Material Options: Available in Ductile Iron and Steel, with carbon steel for expansion shells and cast iron for rock anchors.

Reliable After-Sales Service: Comprehensive 12-month warranty and after-sales service coverage for all products.

Fast Lead Time: Average lead time is one month for both peak and off-season periods.

Company profile

Ningbo Supreme Machinery Co., Ltd.

Zhejiang, China

Business Type: Manufacturer/FactoryExport Year: 1990-02-01Nearest Port: Ningbo, Shanghai, TianjinAverage Response Time: ≤10.10hTerms of Payment: LC, T/TInternational Commercial Terms(Incoterms): FOB, CFR, CIF

About Our Factory & Business Background

AddressYuan Feng Road, Dongjiao Industrial Area Fenghua, Ningbo China, 315500, Ningbo, Zhejiang, China

Average Lead TimePeak Season Lead Time: one month Off Season Lead Time: one month

Our Production Capability & Technical Expertise

Main ProductsIron Sand Casting Part, Ductile Iron Casting Part, Gray Iron Casting Part, Stainless Steel Casting Part, Precision Investment Casting Part, Carbon Steel Casting Part, Lost Wax Casting Part, Grey Iron Casting Part

Our Industry Experience & Global Business Record

Main MarketsNorth America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid East, Eastern Asia, Western Europe

Product Q&A

Q:What materials are used for these bolts?

The bolts are made from Ductile Iron and Steel. Specifically, carbon steel is used for the expansion shell, and cast iron is used for the rock anchor bolts.

Q:What certifications does the product have?

The product is certified under CE, RoHS, ISO 9001:2000, ISO 9001:2008, and various standards including AISI, ASME, BS, ANSI, JIS, GB, ASTM, and DIN.

Q:Can the size and diameter be customized?

Yes, the size and diameter (35-38mm) can be customized according to your specific drawings.

Q:What is the warranty period?

We provide a 12-month warranty and after-sales service for all our mechanical roof bolts.

Q:What is the average lead time for production?

The average lead time is one month, regardless of whether it is the peak season or the off-season.