📦 DTH Hammers

SF90 (M30C) DTH Hammer

Name: SF90 (M30C) DTH Hammer
Brand: Kaishan
SKU: SF90 (M30C)
Availability: InStock

Model: SF90 (M30C)

SF90 (M30C) DTH Hammer (official model SF90 (M30C)). Source: Zhejiang Kaishan Heavy Industry product centre.

Best For

Open-Pit Mining Quarrying Water Well Drilling Construction Foundation

Technical Specifications

Model	SF90 (M30C)
Type	Down-the-hole (DTH) Hammer
Size	90 mm class
Application	Mining, quarrying, water well, construction
Material	Alloy steel
Weight	Approx. 25 kg
Packing	Wooden case

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Selection Advantages Applications Comparison Components Principle Features Packaging Service FAQ

Product Details

## Overview The Kaishan SF90 (M30C) is a down-the-hole (DTH) hammer designed for efficient rock drilling in the 90 mm class. As a core component of drilling tools, it is engineered to deliver high impact energy directly to the bit, maximizing penetration rates in hard rock conditions. This hammer is widely used with DTH drilling rigs in mining, quarrying, water well drilling, and construction projects. ## Technical Features The SF90 (M30C) features a robust alloy steel body and precision-machined internal parts, including the piston, cylinder, and valve system. Its optimized air distribution ensures stable impact frequency and energy output, reducing air consumption while maintaining high drilling efficiency. The hammer’s simple structure allows for quick disassembly and maintenance, minimizing downtime. It is compatible with standard 90 mm DTH bits and common drill pipes, making it a versatile choice for various drilling tools configurations. The M30C designation indicates a specific internal design variant optimized for medium-hard to hard rock formations. ## Applications This DTH hammer is suitable for blast hole drilling in open-pit mines and quarries, water well drilling in hard rock layers, and foundation drilling for construction. It performs well in granite, limestone, sandstone, and other abrasive formations. The SF90 (M30C) can be used with Kaishan drilling rigs as well as other compatible rigs that accept 90 mm class hammers. Its reliable performance makes it ideal for contractors seeking consistent productivity and lower cost per meter drilled. ## Quality and Support Kaishan manufactures the SF90 (M30C) under strict quality control, ensuring each hammer meets international standards for material and workmanship. The hammer is backed by Kaishan’s global service network, offering technical support, spare parts, and training. With proper maintenance, the SF90 (M30C) delivers long service life and stable operation, making it a valuable addition to any drilling tools inventory.

Technical Selection

Key parameters for matching this machine to your job. Send us your hole diameter, depth and rock condition and our engineers will confirm the right configuration.

Weight

Approx. 25 kg

Model

SF90 (M30C)

Type

Down-the-hole (DTH) Hammer

Size

90 mm class

Application

Mining, quarrying, water well, construction

Material

Alloy steel

Packing

Wooden case

Not sure this model fits? Tell us the hole diameter and depth — we will confirm the matching rig, compressor and hammer.

Check with an engineer

Key Advantages

✓

High impact energy for efficient rock penetration

✓

Optimized air consumption for cost-effective operation

✓

Robust alloy steel construction for long service life

✓

Simple structure for easy maintenance and quick rebuilds

✓

Compatible with standard 90 mm DTH bits and drill pipes

✓

Stable performance in hard and abrasive rock formations

✓

Precision-machined internal components for reliable operation

✓

Backed by Kaishan global service and spare parts network

Applications

📍 Open-Pit Mining

Blast hole drilling in hard rock such as granite and iron ore.

Solution: SF90 (M30C) delivers high penetration rates and consistent hole quality, reducing drilling cost per meter.

📍 Quarrying

Production drilling in limestone, sandstone, and aggregate quarries.

Solution: Optimized air consumption and durable construction ensure reliable performance in abrasive conditions.

📍 Water Well Drilling

Drilling water wells in hard rock formations.

Solution: The hammer's stable impact energy and compatibility with 90 mm bits make it ideal for water well projects.

📍 Construction Foundation

Foundation drilling for buildings, bridges, and infrastructure.

Solution: SF90 (M30C) provides precise hole alignment and efficient drilling in confined urban sites.

Similar Models in This Category

This model is unique in its series — here are similar models from the same category.

Model	Model	Type	Size	Application	Material	Inquire
SF90 (M30C)This model	SF90 (M30C)	Down-the-hole (DTH) Hammer	90 mm class	Mining, quarrying, water well, construction	Alloy steel	Get a Quote
K10	K10	DTH Hammer	10 inch	Mining, Water Well, Quarry, Construction	Alloy Steel	Get a Quote
K3	K3	DTH Hammer	3 inch	Mining, quarrying, water well drilling, construction	Alloy steel	Get a Quote
K30C	K30C	Down-the-Hole (DTH) Hammer	3 inch (76.2 mm) nominal	Mining, quarrying, water well drilling, construction	High-quality alloy steel, heat-treated	Get a Quote
K4	K4	DTH Hammer	4 inch	Mining, water well, quarry, construction	Alloy steel, heat-treated	Get a Quote
K40	K40	DTH Hammer	4 inch	Mining, quarrying, water well drilling, construction	High-strength alloy steel	Get a Quote
K40C	K40C	Down-The-Hole (DTH) Hammer	4-inch class (105-130mm hole diameter)	Mining, water well, quarry, construction drilling	Alloy steel, heat-treated	Get a Quote
K46	K46	DTH Hammer	4 inch	Mining, Quarrying, Water Well Drilling, Construction	High-Strength Alloy Steel	Get a Quote
K5	K5	Down The Hole (DTH) Hammer	5 inch	Mining, quarrying, water well, construction	Alloy steel, heat-treated	Get a Quote

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Main Components

Top sub
Check valve
Piston
Cylinder
Valve system
Bit retainer
Drive chuck
Bottom sub

Working Principle

The Kaishan SF90 (M30C) DTH hammer operates on the principle of down-the-hole percussion. Compressed air is supplied through the drill pipe to the hammer, which is located directly above the drill bit. Inside the hammer, a piston reciprocates rapidly under air pressure, striking the bit's shank with high impact energy. The bit then transmits this energy to the rock, causing fracturing and penetration. Simultaneously, the exhaust air flows through the bit's flushing holes to remove cuttings from the hole bottom and cool the bit. The hammer's valve system controls the timing of air admission and exhaust, ensuring efficient energy transfer and consistent impact frequency. This design minimizes energy loss through the drill string, resulting in faster penetration rates and reduced fuel consumption compared to top-hammer drilling in hard rock. The SF90 (M30C) is optimized for 90 mm class bits and typical air pressures used in DTH drilling.

Detailed Features

▸High impact energy for fast penetration
▸Optimized air consumption
▸Durable alloy steel construction
▸Simple maintenance design
▸Compatible with 90 mm DTH bits
▸Stable performance in hard rock
▸Precision-machined internals
▸Global service support

Packaging & Shipping

Each Kaishan SF90 (M30C) DTH hammer is packed in a wooden case with rust-preventive coating and secured for ocean transport. Standard export packing ensures protection against moisture and impact. We can arrange shipment in 20ft or 40ft containers, or as LCL depending on order quantity. Lead time is typically 15-30 days after order confirmation. Ports of shipment include Shanghai, Ningbo, or other major Chinese ports as requested. Customized packaging and labeling are available for OEM orders.

After-Sales Service

Kaishan provides a 12-month warranty on the SF90 (M30C) DTH hammer against manufacturing defects. Our global service network offers 24-hour technical support via email or phone. We provide operation and maintenance training for customers and distributors. Genuine spare parts are available from regional warehouses for fast delivery. Our engineers can assist with troubleshooting and rebuild services to extend hammer life. For bulk orders, we offer on-site installation and commissioning support.

Frequently Asked Questions

What size range does the SF90 (M30C) DTH hammer cover?+

The SF90 (M30C) is a 90 mm class down-the-hole hammer used with standard 90 mm DTH bits. It weighs approximately 25 kg and is built for rock drilling in the 90 mm class. It is applied in mining, quarrying, water well and construction work.

What is the SF90 (M30C) DTH hammer made of?+

The SF90 (M30C) is made of alloy steel with precision-machined internal components, including the piston, cylinder and valve system. Its simple structure allows quick disassembly and maintenance. The alloy steel body is intended for hard and abrasive rock formations.

Which equipment does the SF90 (M30C) DTH hammer work with?+

The SF90 (M30C) is compatible with popular DTH rigs, standard 90 mm DTH bits and common drill pipes. It is used as a drilling tool on DTH drilling rigs. Its optimized air distribution supports stable impact frequency and energy output.

What applications suit the SF90 (M30C) DTH hammer?+

The SF90 (M30C) is applied in open-pit mining, quarrying, water well drilling and construction foundation work. It drills blast holes, water wells and foundation holes in hard and abrasive formations. The 90 mm class hammer weighs approximately 25 kg.

How is the SF90 (M30C) DTH hammer packed for shipping?+

Each SF90 (M30C) DTH hammer is packed in a wooden case with rust-preventive coating and secured for ocean transport. Standard export packing protects against moisture and impact. Shipment can be arranged in 20ft or 40ft containers, or as LCL depending on order quantity.

What warranty and support come with the SF90 (M30C) DTH hammer?+

Kaishan provides a 12-month warranty on the SF90 (M30C) DTH hammer against manufacturing defects. The global service network offers 24-hour technical support via email or phone. Operation and maintenance training is provided for customers and distributors, and genuine spare parts are available from regional warehouses.

What is the lead time and port of shipment for the SF90 (M30C)?+

Lead time for the SF90 (M30C) is typically 15-30 days after order confirmation. Ports of shipment include Shanghai, Ningbo or other ports. The hammer is packed in a wooden case for export.

How does the SF90 (M30C) differ from other DTH hammers?+

The SF90 (M30C) is a 90 mm class DTH hammer weighing approximately 25 kg, made of alloy steel. It is compatible with standard 90 mm DTH bits and common drill pipes. Its simple structure allows quick disassembly and maintenance.