Levcon Jaykay Machinery Pvt. Ltd.

Doctor Blade Application

Roll Location	Roll Materials	Blade Materials (Machine speed over 600 m/min)	Working angle (θ)	Advisable Blade Pressure N/m
				Normal	Maximum
Breast Rolls	Rubber(4 - 20 P&J)	LA1 – LA3 – LB7	20⁰ - 25⁰	80	120
	Hard Rubber (0-3 P&J)	LA1 – LA3 – LB7	25⁰	80	130
	Black Diamond.	LB5 – LB7	25⁰	80	130

Wire Rolls & Felt Rolls	Hard Rubber (0-3 P&J)	LA1 – LA3 – LB7	25⁰	80	110
	Black Diamond	LB5 – LB7	25⁰	80	110
	Beltex	LA1 – LA3	25⁰	80	110
	Copper/Bronze	LA3 – LB5	25⁰	80	110
	Stainless Steel	LB5 – LA3 – LB7	25⁰	80	110

Press Rolls	Dynarock	LB7 – LB3	25⁰ - 30⁰	170	350
	Rubber (4-20 P&J)	LA1 – LB7	20⁰ - 25⁰	100	150
	Hard Rubber (0-3 P&J)	LC1 – LB3 – LB7– LB1	25⁰ - 30⁰	170	300
	Granite	LMO – L18 – LB7 – LB3 – LB1	25⁰ - 30⁰	280	400
	Microrock	LB7 – LB3	25⁰	200	350
	Ceramic	LC4 – LC1 – LB1	25⁰	200	300
	Stonite	LB3 – LB7	25⁰	230	270

Grooved venta-nip	Rubber ( 0-10 P&J )	LA1 – LA3	15⁰ - 25⁰	50 - 90	120
Grooved venta-nip	Polyurethane	LA1 – LA3	15⁰ - 25⁰	50 - 90	90

Dryers MG Cylinder Size Press Cooling Cylinder	Micro mate	LB7 – LB3	25⁰	100	160
	Cast Iron	LB7 – LBZ – L13 – LBR	25⁰ - 30⁰	160	450
	Chrome	LB7 – LB5 – LB1	25⁰ - 30⁰	130	170
	Steel	LB7 – LBZ – LMO	25⁰ - 30⁰	80	180
	Hard Rubber( 0 – 3P&J)	LB3 – LB7	15⁰ - 30⁰	90	160
	Bronze/Chrome Coated	LB7 – LB3 – LB5	25⁰	90	160
	Copper/Nickel Coated	LB7 – LB5	25⁰	70	140

Calendar Stack Super Calendar	Cast iron Control Crown	LB1 – LB7 – LC1 – LB3	30⁰	180	350
	Cast iron Intermediate	LB1 – LB7 – LMO – LC1	25⁰ - 30⁰	90	200
	Polyurethane	LB3 – LB7 – LC1 – LB1	27⁰	100	200
	Soft Cover Intermediate	LB7 – LB1 – LC1	25⁰	90	150
	Soft Cover Control Crown	LC1 – LB1 – LB7	27⁰	100	160

Reel Drum	Cast Iron/Steel	LB7 – LBZ – LB3	25⁰ - 30⁰	145	200

The selection of doctor blades for various application as indicated above is linked to the speed of the machine , condition of the rolls , condition of existing doctoring systems and holder , presence of oscillations and lubrication. All the recommendation are indicative and not specific. For proper use of the table which can be modified without any prior notice , it is requested that you contact us for any kind of technical assistance.

* Email to: Levconjaykay@Ljaykay.com

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