DTII Belt Conveyor Lower Impact Idler for Mining Machinery

The DTII Belt Conveyor Lower Impact Idler is a critical component in the DTII conveyor system, an advanced version of the TD75 standard, widely used in mining, coal, ports, and other heavy industries. These idlers are designed for the carrying side of the conveyor, specifically at loading points, to absorb the impact of falling materials like coal, ore, or aggregates. Featuring rubber rings or discs around a steel roller, they cushion the belt against heavy impacts, reducing wear and extending belt life.

Built for tough mining conditions, these idlers minimize damage, ensure smooth operation, and reduce maintenance costs. This page covers what lower impact idlers do, where they’re used, how to install them, what users say, and answers common questions, all in plain language to help you decide if they’re right for your conveyor system.

DTII Belt Conveyor Lower Impact Idler for Mining Machinery Dimensions:

Explanation: The fasteners connected to the intermediate frame are included in this assembly drawing.

Unit: mm

Belt width B	D	L	H1	H2	E	A	P	Q	d	Bearing model	Drawing No
500	89	323	100	334	840	740	130	90	M12	4G204	DTⅡ01C2811
650		398		328	990	890					DTⅡ02C2811
800		473	144.5	367.5	1150	1090					DTⅡ03C2811
	108	488	154	396	1176					4G205	DTⅡ03C2822
1000		590	164	411	1376	1290			M16	4G305	DTⅡ04C2823
	133		176.5	443.5							DTⅡ04C2833

DTII Belt Conveyor Lower Impact Idler for Mining Machinery Features:

The DTII Lower Impact Idler is designed to protect the conveyor belt at loading points on the carrying side by absorbing the impact of falling materials, ensuring durability and efficiency in rugged mining environments. Here’s what it offers:

1. Impact-Absorbing Rubber Rings

   • Features rubber rings or discs (often made of high-grade natural or synthetic rubber) around a steel roller to absorb the kinetic energy of falling materials.

   • Minimizes belt damage and reduces spillage at loading zones.

2. Durable Materials

   • Roller tube made of Q235 steel (equivalent to SS400/JIS G3101/ASTM A36) for strength under heavy impacts.

   • Shafts crafted from 45# steel (equivalent to DIN C45/JIS S45C/ASTM A1045) for precision and durability.

   • Optional HDPE or polyurethane coatings for enhanced wear and corrosion resistance.

3. High-Quality Bearings

   • Equipped with deep groove ball bearings (6204, 6205, 6305, etc., with C3 clearance, 2RZ/2Z seals) for smooth rotation and long life.

   • Triple labyrinth seals protect against dust, dirt, and moisture, ideal for mining conditions.

4. Low Noise and Vibration

   • Precision manufacturing and balance testing ensure quiet operation and minimal vibration.

   • Reduces wear on the belt and conveyor frame, extending system lifespan.

5. Corrosion Resistance

   • Options for zinc plating, baking paint, or epoxy coatings to resist rust in harsh environments like coastal ports.

   • Rubber or polyurethane coatings provide additional durability in abrasive conditions.

6. Customizable Design

   • Roller diameters from 76mm to 219mm, lengths from 100mm to 3000mm, fitting belts 400mm to 2400mm wide.

   • Customizable rubber ring thickness and spacing to match specific material loads and drop heights.

7. Standards Compliance

   • Meets DTII, DTII(A), CEMA (B, C, D, E), JIS, and ISO 9001:2015 standards for quality and safety.

   • Tested for radial runout (≤0.5mm), axial displacement (≤1.2mm), and rotation resistance (≤3.5N) to ensure reliability.

DTII Belt Conveyor Lower Impact Idler Applications:

The DTII Lower Impact Idler is used on the carrying side of conveyors at loading points to protect the belt from the impact of falling materials, particularly in high-impact or heavy-duty systems. It’s ideal for these industries:

1. Mining

   • Protects belts at loading zones in conveyors moving coal, iron ore, copper, or bauxite in underground or open-pit mines.

   • Suits high-impact systems, like a 5 km conveyor in Shandong, ensuring belt longevity.

2. Metallurgy

   • Protects belts handling raw or processed metals at loading points in smelting plants.

   • Corrosion-resistant coatings withstand abrasive or high-temperature environments.

3. Ports and Terminals

   • Protects belts during loading/unloading of coal, grain, or aggregates.

   • Rust-resistant options are perfect for salty coastal environments.

4. Construction

   • Protects belts carrying gravel, sand, or aggregates at loading zones on job sites.

   • Works with mobile or fixed conveyors for versatile setups.

5. Power Plants

   • Protects belts handling coal or ash at loading points in fuel systems.

   • Built for dusty, high-impact conditions.

DTII Belt Conveyor:

Purpose and Scope of Use:

DTII、DTII(A) fixed belt conveyors. Their main parameters, transmission power, and tension calculation methods adopt ISO international standards, and are widely used in various industries.
The material is transported by a single or multiple unit synthetic transportation system.
This conveyor is suitable for working in temperatures ranging from -25°C to 40°C.

Product Features:

◆ Conveying materials is below 2.5t/m3
◆ Can be divided into 500, 650, 800, 1000, 1200, 1400, 1600, 1800, 2000、2200, 2400
◆ Can be divided into：0.8, 1.0, 1.25, 1.6, 2.0, 2.5, 3.15、4.0, (4.5), 5.0, (5.6), 6.5

 

Belt  width  (mm)	0.8	1.0	1.25	1.6	2.0	2.5	3.15	4	(4.5)	5.0	(5.6)	6.5
500	69	87	108	139	174	217
650	127	159	198	254	318	397
800	198	248	310	397	496	620	781
1000	324	405	507	648	811	1014	1278	1622
1200		593	742	951	1188	1486	1872	2377	2674	2971
1400		825	1032	1321	1652	2065	2602	3304	3718	4130
1600					2186	2733	3444	4373	4920	5465	6122
1800					2795	3494	4403	5591	6291	6989	7829	9083
2000					3470	4338	5466	6941	7808	8676	9717	11277
2200							6843	8690	9776	10863	12166	14120
2400							8289	10526	11842	13158	14737	17104

Note:
1. The conveying capacity in the table is calculated based on horizontal transportation, with a dynamic stacking angle of 20° and a roller groove angle of 35°.
2. The belt speeds of 4.5m/s and 5.6m/s in the table are non-standard values and are generally not recommended for use.

Installation Guidelines:

Installing DTII Lower Impact Idlers is straightforward with these steps:

1. Verify Specifications

   • Ensure the idler’s diameter, length, rubber ring thickness, and frame design match your conveyor’s belt and loading zone requirements.

   • Confirm the frame can support the idler’s weight and material impact loads.

2. Position the Idlers

   • Install at loading points on the carrying side, typically spaced 1-3 feet apart based on belt width and material drop height.

   • Use sturdy frames to secure the impact idlers, ensuring proper alignment with the belt.

3. Align the Idlers

   • Set idlers perpendicular to the belt to ensure even support and impact absorption.

   • Use a laser level or string line to align the frame with adjacent idlers for consistent tracking.

4. Inspect Bearings and Seals

   • Verify bearings are lubricated with lithium soap grease and triple labyrinth seals are intact.

   • Avoid disturbing seals to maintain dust and water resistance.

5. Adjust Belt Tension

   • Set tension to keep the belt snug without overloading the idlers. Use:
     [ T = \frac{P_p \cdot 1000}{v} ] where (T) is tension (Newtons), (P_p) is power (kilowatts), and (v) is belt speed (meters/second).

6. Test the System

   • Run the conveyor at low speed with a light load to check idler performance, belt alignment, and impact absorption.

   • Adjust the frame or idler position if the belt shows uneven wear or misalignment.

Installation Tips

• Use trained technicians to meet safety and industry standards.

• Document installation details for maintenance records.

• Consider installing a buffer bed for extreme drop heights, as suggested for large blanking drops.

• Contact us for expert setup assistance.

Maintenance Tips

Regular care keeps DTII Lower Impact Idlers performing well:

• Inspect Regularly: Check rubber rings, rollers, bearings, and frames every 3-6 months for wear or damage.

• Lubricate Bearings: Apply lithium soap grease every 6 months to ensure smooth rotation.

• Clean Rollers: Remove material buildup from rubber rings to maintain impact absorption.

• Check Alignment: Verify idlers remain perpendicular to prevent belt drift.

• Replace Damaged Parts: Use DTII-compliant parts to maintain performance, replacing worn rubber rings promptly.

• Avoid Damage: Do not strike the idler or rubber rings with heavy objects to prevent damage to bearings or seals.

Customer Feedback:

Here’s what users of DTII Lower Impact Idlers say:

1. Australian Iron Ore Mine

   “The rubber rings handle heavy ore drops perfectly. Our belts last longer, and downtime is way down.” – James Carter, Site Engineer

2. South African Port Terminal

   “The corrosion-resistant coatings are great for our coastal setup. These idlers need almost no upkeep.” – Thandiwe Zuma, Logistics Manager

3. Chilean Copper Mine

   “Our conveyor’s reliability is up 20% with these idlers. They’re tough and save us on repairs.” – Carlos Vargas, Maintenance Supervisor

Related Questions (FAQs):

Got questions? Here are clear answers with keywords to help you find us:

1. What’s a DTII Lower Impact Idler?

A roller with rubber rings used at loading points on the carrying side of mining conveyors to absorb the impact of falling materials, protecting the belt.

2. How does it protect the belt?

Rubber rings or discs cushion the belt, absorbing the kinetic energy of falling materials to prevent tears and punctures.

3. What’s it made of?

Q235 steel for roller tubes, 45# steel for shafts, with rubber rings or optional HDPE/polyurethane coatings for durability.

4. How often should I maintain it?

Inspect every 3-6 months, lubricate bearings, clean rubber rings, and check alignment. Don’t tamper with seals.

5. Where’s it used?

Mining, metallurgy, ports, construction, and power plants for handling high-impact materials like coal or ore.

6. How does it improve my conveyor?

It protects the belt from impact damage, reduces spillage, and cuts maintenance for better efficiency and safety.