Flexible shaftless screw conveyor

Flexible shaftless conveyors RATAJ® (types SL, SLK, SLN, SLNK) are used for the transport of fine-grained and light materials for conveying capacities of approx. 0,001 to 15 m³/h. and especially when transporting curves and over long distances of up to 120 m per power unit. There are no intermediate bearings on the entire conveyor line, which makes it possible to transport material in the entire cross-section at an output about 70 % higher than that of conventional worm conveyors with shafts and intermediate bearings at comparable parameters.

Conveyors are widely used in the food, chemical and plastic industries for dosing into packaging machines and weighing equipment, emptying and filling of BiG-BAG bags, etc. The radius of curves is designed for individual conveyor diameters in an optimal way so as to maintain the main principle ie centering axisless spirals conveyed by the material. It is possible to use several entrances, lunges and arches on one route, depending on physical properties of transported material and technological conditions. The material design of the conveyors can be steel, stainless steel or plastic according to customer requirements. (exact specification below).

lehký spirálový dopravník + vypradňovací BIG-BAG stanice

Conveyor made from

SCREW:

Type SL - steel (according to EN - S235, S355)
Type SLK - round steel (according to EN - S235, S355)
Type SLN - stainless steel (according to ASTM - AISI 302)
Type SLNK - round stainless steel (according to ASTM - AISI 302)

CONDUIT:

steel (according to EN - S235, S355)
stainless steel (according to ASTM - AISI 304, AISI 316)
plastic (PVC, polyamid PA 6, PA 12, POM, PE)

Depending on the type of material to be conveyed and the specific technological conditions, combinations of material designs and other dimensional variants of spirals different from the table below are also used.

Contact us

+420 387 240 910
rataj@rataj.cz

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Types of Flexible shaftless screw

Type	Spiral diameter outside	Thread pitch	Spiral inside diameter	Spiral thickness	Max. length	Transport performance
*/1**	(mm) */2**	(mm)	(mm)	(mm)	(m)	(m3/hod) */3**
SL 38	38	31	22	4	100 - 120	0,001 - 0,5
SLN 38	38	31	22	4	50 - 70	0,001 - 0,5
SLN 52	52	37	28	4,7	50 - 70	0,001 - 1,5
SLN 52	52	37	32	3,4	50 - 70	0,001 - 1,5
SL 53	53	37	33	4,3	50 - 70	0,001 - 1,5
SL 60	60	40	36	4,3	50 - 70	0,001 - 1,5
SL 60	60	50	36	4	50 - 70	0,001 - 1,5
SLK 60	60	40	48	6	50 - 70	0,001 - 1,5
SL 61	61	42	37	5	85 - 100	0,001 - 1,5
SL 61	61	60	37	4	85 - 100	0,001 - 1,5
SLN 61	61	42	37	4,7	30 - 50	0,001 - 1,5
SL 68	68	50	44	4,4	70 - 80	0,001 - 4,0
SL 68	68	50	44	5	70 - 80	0,001 - 4,0
SL 68	68	60	44	4	70 - 80	0,001 - 4,0
SL 68	68	68	44	7	70 - 80	0,001 - 4,0
SLN 68	68	50	44	4,7	30 - 50	0,001 - 4,0
SLN 68	68	60	44	4	30 - 50	0,001 - 4,0
SLK 68	68	50	52	8	70 - 80	0,001 - 3,0
SLNK 68	68	50	52	8	30 - 50	0,001 - 4,0
SL 70	70	50	46	4	70 - 80	0,001 - 4,0
SL 70	70	50	46	4,3	70 - 80	0,001 - 4,0
SL 70	70	65	46	4	70 - 80	0,001 - 4,0
SLK 70	70	65	46	12	70 - 80	0,001 - 4,0
SL 74	74	50	44	4,7	70 - 80	0,001 - 4,0
SLN 90	90	60	66	4,7	20 - 30	0,001 - 15,0
SLN 94	94	66	66	5	20 - 30	0,001 - 15,0
SL 95	95	65	67	5	40 - 50	0,001 - 15,0
SL 95	95	66	66	4,7	40 - 50	0,001 - 15,0
SL 95	95	66	66	5	40 - 50	0,001 - 15,0
SLK 95	95	70	71	12	40 - 50	0,001 - 15,0
SLK 100	100	70	76	12	40 - 50	0,001 - 12,0

/*1 Types marked by red color = stainless screw and pipeline.

/*2 Outer diameter flexible shaftless conveyors depend on the type and physical properties of transported material.

/*3 Transport performances of each conveyors depends on the type and physical properties of transported material.