1. Adopt convex-concave roll, and the rolling curve is comprised of straightening, tumbling and transition sections, with both straightening and tumbling roles. As a line-contact device, it can achieve full-range straightening and tumbling.

2. Adopt double rolls pressing/straightening principle with constant-pressure load control, turn rigid frame into flexible one, and ensure required pressure on straightening and tumbling of bars. What’s more, it can reduce head-tail necking phenomenon and protect mechanical equipments.

3. Adopt electric adjustment and digital display for roll clearance, characterized by high sensitivity and reliability, and convenient operation and maintenance.

4. The hydraulic system, equipped with hydraulic station, adopts ram pump as power source. The overload unloading adopts direct-acting overflow valve, which may maintain the pressure and buffer.

5. The feeder system adopts anti-scratching protective measures, and elevating charging basket adopts plate-dragging organ, which may arrange the materials regularly and also reduce the impacts and noises.

 SMV2 Series Two Roll Metal Bar/Rod/Tube/Pipe Straightening Machine (Straigthener)

Item	Unit	Specification & Model
		RD15		RD40	RD60	RD80	RD100	RD150	RD200	RD250
Bar diameter	mm	Φ3-15	Φ8-40		Φ12-60	Φ15-80	Φ30-100	Φ50-150	Φ80-200	Φ130-250
Yield strength	N/mm2	≤1100	≤1100		≤1100	≤1100	≤1100	≤1100	≤1100	≤1100
Original curvature	mm/m	≤4	≤4		≤4	≤4	≤4	≤4	≤4	≤4
Surface roughness	Ra	≤3.2	≤3.2		≤3.2	≤3.2	≤3.2	≤3.2	≤3.2	≤3.2
Straightening precision	mm/m	≤0.3	≤0.3		≤0.3	≤0.3	≤0.3	≤0.3	≤0.3	≤0.3
Roughness after tumbling	Ra	≤0.4	≤0.4		≤0.4	≤0.4	≤0.4	≤0.4	≤0.4	≤0.4
straightening speed	m/min	5-30	5-30		5-30	5-30	5-30	5-20	5-20	5-20
Main motor power	KW	15×2	37×2		55×2	75×2	110×2	180×2	400×2	480×2