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Bond index detector NJ-300 bond index detector working principle and structural features: This instrument consists of part of the motor, reducer, drum, counters and so on shell composed of two drum driven by a motor through worm reducer 50 ± 2r / min speed of rotation, so that coal, coke strength test block in the drum, so that the size of the damage resistance expressed in coal abrasion resistance is a real kind of bonding capacity. Analyzer with integrated electronic counter with the count is accurate, easy to operate features, and can be set to 999 rpm in a turn within to achieve controlled shutdown. This instrument is in line with the national standard GB5447-85 << >> Determination of caking index of bituminous coal requirements. Technical parameters: speed: 50 ± 2r / min range: 1 to 999 turn (arbitrarily set): LED digital display, manual or automatic reset boot Power: AC220V ± 10% 50HZ Power: 120W measuring caking index standard anthracite