Blood Centrifuge Machine - Hand Driven 4 Tubes The hand driven blood centrifuge machine carries 4 buckets and is table mounted. Hand driven, as the name suggests, swing out head with Ball Bearing provision. For 4 tubes Single speed hand driven machine consists of a metal body enclosing a steel pinion and worm drive fitted with superior quality ball bearing assembly. Provided with removable crank handle. It has an integral clamp for fixing on to a table with polyamide buckets to hold 15ml glass tube. Very superior quality with 1500 - 2000 revolution per minute. (A) 4 buckets for 15 ml glass tubes (B) 2 buckets for 15 ml glass tubes.