Transmission chain

drivepower transmissioncarbon steel

Overview
DIN 22252 round link chain is a heavy-duty chain specified for mining and bulk-conveying applications. Manufactured to defined standards, it delivers high tensile strength, wear resistance and dimensional precision required for conveyor and cutting equipment in underground and surface mining operations.

Introduction
DIN 22252 round link chain (round steel link chain, mining conveyor chain) is produced according to the DIN 22252 specification. Typical manufacturing materials include carbon and alloy steels selected for tensile strength and fatigue resistance. Chains are supplied in multiple sizes and grades to match application requirements and interface with sprockets and attachments used in chain drive systems.

Application

• Convoyeurs frontaux blindés (Armoured Face Conveyors, AFC)
• Chargeurs à étape sur poutre (Beam Stage Loaders, BSL)
• Roadheader machines and cutting equipment
• Coal plows and shearer auxiliary drives
• Other heavy machinery requiring round link mining chain

Standards
Production according to DIN 22252 or PN-G-46701 or GB/T-12718 or GOST 25996 standards.

Materials & Treatments

• Materials: carbon steel, high carbon steel, manganese steel, 20MN2, 25mnV, 23MnNiCrMo54
• Treatments: heat treatment, carburizing, blackening, electrophoresis, shot blasting

Dimensions (selected rows)
Chain Size (d x p) | Diameter d (mm) | Pitch P (mm) | b1 min. (mm) | b2 max. (mm) | Weight (kg/m)
14 x 50 | 14 ±0.4 | 50 ±0.5 | 17 | 48 | 4.0
18 x 64 | 18 ±0.5 | 64 ±0.5 | 21 | 60 | 6.6
19 x 64.5 | 19 ±0.6 | 64.5 ±0.6 | 22 | 63 | 7.4
22 x 86 | 22 ±0.7 | 86 ±0.9 | 26 | 73 | 9.5
24 x 86 | 24 ±0.7 | 86 ±0.9 | 28 | 79 | 11.6
24 x 87.5 | 24 ±0.7 | 87.5 ±0.9 | 28 | 79 | 11.5
26 x 92 | 26 ±0.8 | 92 ±0.9 | 30 | 85 | 13.7
30 x 108 | 30 ±0.9 | 108 ±1.1 | 34 | 97 | 18.0
34 x 126 | 34 ±1.0 | 126 ±1.3 | 38 | 110 | 22.7
38 x 126 | 38 ±1.1 | 126 ±1.4 | 42 | 121 | 30.1
38 x 137 | 38 ±1.1 | 137 ±1.4 | 42 | 121 | 29.0
42 x 137 | 42 ±1.1 | 137 ±1.4 | 48 | 137 | 36.9
42 x 146 | 42 ±1.1 | 146 ±1.5 | 48 | 137 | 36.0

Mechanical properties (selected extracts)
The mechanical properties table provides test force, minimum breaking force, elongation at test force and breaking, deflection and fatigue resistance for each chain size and grade. Example extracts:
Chain Size | Grade | Test Force (kN) | Breaking Force min. (kN) | Elongation at test force max (%) | Elongation at breaking force min (%) | Deflection f min. (mm) | Fatigue Resistance (cycles)
14 x 50 | B | 150 | 190 | 1.4 | 14 | 14 | 50,000
14 x 50 | C | 200 | 250 | 1.6 | 14 | 14 | 70,000
14 x 50 | C++ | 200 | 280 | 1.6 | 18 | 14 | 90,000
18 x 64 | B | 260 | 320 | 1.4 | 14 | 18 | 50,000
18 x 64 | C | 330 | 410 | 1.6 | 14 | 18 | 70,000
18 x 64 | C++ | 330 | 460 | 1.6 | 18 | 14 | 90,000
22 x 86 | B | 380 | 490 | 1.4 | 14 | 22 | 50,000
22 x 86 | C | 490 | 610 | 1.6 | 14 | 22 | 70,000
22 x 86 | C++ | 490 | 680 | 1.6 | 18 | 14 | 90,000
26 x 92 | B | 540 | 670 | 1.4 | 14 | 26 | 50,000
26 x 92 | C | 640 | 850 | 1.6 | 14 | 26 | 70,000
26 x 92 | C++ | 700 | 960 | 1.6 | 18 | 16 | 90,000
30 x 108 | C | 850 | 1130 | 1.6 | 14 | 30 | 70,000
30 x 108 | C++ | 950 | 1280 | 1.6 | 18 | 30 | 90,000
34 x 126 | C | 1080 | 1450 | 1.6 | 14 | 34 | 70,000
34 x 126 | C++ | 1200 | 1650 | 1.6 | 18 | 34 | 90,000
38 x 126 / 38 x 137 | C | 1360 / 1500 | 1810 / 2040 | 1.6 | 18 | 38 | 70,000
38 x 126 / 38 x 137 | C++ | 1500 / 1700 | 2040 / 2270 | 1.9 | 16 | 38 | 90,000
42 x 137 / 42 x 146 | C | 1660 / 1800 | 2200 / 2500 | 1.6 | 18 | 42 | 70,000
42 x 137 / 42 x 146 | C++ | 1800 / 2070 | 2500 / 2770 | 1.9 | 16 | 42 | 90,000

Notice
Anti-corrosive coatings reduce mechanical properties; specify coating and grade requirements when ordering. Other sizes and special grades can be manufactured to customer specifications.

Technical specifications

• Denomination / Model: DIN 22252
• Product type: Round link mining chain / round steel link chain
• Standards: DIN 22252, PN-G-46701, GB/T-12718, GOST 25996
• Materials: carbon steel, high carbon steel, manganese steel, 20MN2, 25mnV, 23MnNiCrMo54
• Treatments: heat treatment, carburizing, blackening, electrophoresis, shot blasting
• Applications: Armoured Face Conveyors, Beam Stage Loaders, roadheader machines, coal plows, heavy machinery
• Dimension and mechanical property tables available for multiple chain sizes (examples included above)
• Customization: other sizes and grades produced to customer requirements