Conveyor elements - Idlers

Careful selection of idlers: Key factors in view

We develop components for roller-based conveyor technology to optimize your material flow and operational logistics.

Deciding on the right idler roller requires careful consideration of each assembly such as tube, axle and bearing. Matching the material and design to your application is essential and includes considering aspects such as roller length, tube and axle dimensions, bearing type, center distance and conveying speed. The choice of material for assemblies and drive elements is also of great importance.

Configuration with a focus on durability and performance
During configuration, it must be ensured that the bearing, tube and axle can withstand the planned loads. Specific technical and environmental requirements such as electrical conductivity and adaptation to temperature and humidity must be taken into account to ensure a high-performance and sustainable application.

Sealing

At Rollex, we ensure the protection of our plastic bearings by using specific sealing solutions. Our customers can choose between the efficient labyrinth seal and the robust abrasive plastic seal. Both options aim to optimally protect the bearings from contamination and dirt to ensure consistent performance and increased service life.

Plain bearings, constructed from thermoplastic material and supplemented by a plain bearing bush made from PA or POM, offer an optimum solution, particularly for light materials and are ideal for use in wet areas.

Another element in the portfolio is the ball series, made of thermoplastic material, especially PP, which can be fitted with steel or stainless steel balls - a predestined choice for light materials as well. There are also conical ball bearings made of hardened steel, which are suitable for both light and medium-weight conveyed goods.

We also offer precision ball bearings that are lightly greased and standardised to DIN 625, available with different seals and in various series, whereby a bearing clearance of C3 must always be observed.

Bearing base

Rollex designs support rollers with various bearing bases: our plastic roller bases made of polyamide (PA), polypropylene (PP) or polycarbonate (PC) minimise noise emissions, while our steel bearing bases, made of galvanised or bright deep-drawn sheet steel, minimise noise emissions.

Axle finishes

At Rollex, we understand how essential specialised surface finishes are for idlers in a variety of applications. Our expertise enables us to provide a versatile range of surface and coating options that are precisely tailored to your requirements. Discover the possibilities and choose the optimum solution for your needs.

Untreated pipe surfaces

Rollex presents a range of untreated idler tubes, including variants made of steel tube (ST), stainless steel tube (N2) and plastic tube (KB or KGH), which do not undergo any additional surface treatment and can be differentiated by specific abbreviations.

Galvanised surfaces

For effective corrosion protection, Rollex offers electro-galvanised idlers, labelled STI, which are coated with a protective layer approximately 0.8 µm thick. It is important to note that this protection can be impaired by mechanical and thermal influences, and thus corrosion is possible in affected areas. In the case of fully galvanised, driven idlers - including the drive element - the abbreviation ST is used with the suffix "batch galvanised".

PVC-coated idlers

Our range also includes PVC-coated idlers, in which a hose is applied to a steel tube using compressed air. Rollex offers this hose in various designs and dimensions.

We also offer a PU Baytec coating. This allows a choice between black PU Baytec with 73° Shore and others with more complex application methods in various hardness levels between 70-90° Shore.

An epoxy resin coating for steel idler tubes is also available. When ordering, the desired RAL colour number should be specified.

Another option is nitrocarborisation, a thermochemical process that creates a nitrided layer on the steel tube and thus achieves a surface hardness of up to 540 HV1, with a maximum penetration depth of 0.2 mm.

Idler Roller

Driven Roller

Technical data - Tube version

Steel

Tube-ø in mm	Wall thickness: 1 mm	Wall thickness: 1,5 mm	Wall thickness: 2 mm	Wall thickness: 2,9 mm	Wall thickness: 3 mm	Wall thickness: 3,25 mm	Wall thickness: 3,6 mm
16	x
20		x
30	x	x
32			x
40		x	x		x
50		x	x		x
60			x		x
63,5				x
70			x	x
80			x*		x
88,9				x
108						x
133							x

Plastic

Tube-Ø in mm	Wall thickness: 1,5 mm	Wall thickness: 1,8 mm	Wall thickness: 2,3 mm	Wall thickness: 2,8 mm	Wall thickness: 3 mm	Wall thickness: 7 mm
20	x
30		x
40			x
50				x
63					x
90						x

Stainless Steel

Tube-Ø in mm	Wall thickness: 1 mm	Wall thickness: 1,5 mm	Wall thickness: 1,65 mm	Wall thickness: 2 mm	Wall thickness: 2,9 mm	Wall thickness: 3 mm
16	x
20	x
30	x	x
40		x
50		x		x
60,3			x
80				x		x
88,9					x

Further information

Rollex offers several types of surface finishing and coating. Depending on the application, you can choose between the following raw surface finishes:

Untreated: The idler tubes are not treated any further. They are labeled with the abbreviation ST (steel pipe), N2 (stainless steel pipe), KB or KGH (plastic pipe).
Galvanizing: Galvanizing has a layer thickness of approx. 0.8 µm. It serves as corrosion protection, although it should be noted that this protection can be damaged by mechanical and thermal influences. Galvanized tubes are marked with the abbreviation STI. Driven idlers that are to be completely galvanized (including the drive element) are given the suffix "batch galvanized" in addition to the abbreviation ST.
PVC coating: With PVC-coated idlers, a hose is applied to a steel tube using compressed air. Rollex offers the hose in several versions and in various dimensions:

PVC 60° Shore silver grey

Tube-Ø in mm	Wall thickness: 2 mm	Wall thickness: 3 mm	Wall thickness: 5 mm
30	x
40	x	x	x
50	x	x	x
60	x	x	x
80	x	x	x
88,9	x	x	x
108		x	x

PVC 60° Shore silver grey – antistatic

Tube-Ø in mm	Wall thickness: 2 mm	Wall thickness: 3 mm	Wall thickness: 5 mm
50	x	x
60	x	x

Tube-Ø in mm

Wall thickness:

2 mm

Wall thickness:

3 mm

Wall thickness:

5 mm

PVC 88° Shore black

Tube-Ø in mm	Wall thickness: 2 mm	Wall thickness: 3 mm	Wall thickness: 5 mm
	2	3	5
50		x
60		x	x

Tube-Ø in mm

Wall thickness:

2 mm

Wall thickness:

3 mm

Wall thickness:

5 mm

Rubber coating: The roller tube is covered with a black NBR rubber coating. This is bonded and ground to size. The hardness is approx. 60° Shore and is available for all standard tube dimensions. Tube 40 with a 5 mm coating can be supplied as a rubber tube (standard) or as a vulcanized rubber coating.
PU Baytec coating: Roller tubes can also be coated with a PU material. Here you can choose between PU-Baytec 73° black and different hardness levels (70 - 90° Shore), which are more complex to apply.
Epoxy resin coating: Rollex offers steel support roller tubes with an epoxy resin coating. Please specify the RAL color number when ordering.
Nitrocarboration: This is a thermochemical process for enriching the surface layer of the steel pipe with nitrogen and carbon. This creates a nitriding layer consisting of a compound layer and a diffusion layer. This is a hardening process for surfaces, i.e. the penetration depth is max. 0.2 mm. The edge zone then has a hardness of max. 540 HV1.

Pipe design

Axle designs

Material:
Rollex uses free-cutting steel to DIN EN 10277-3 or EN 10278-h in the normal steel range and material 1.4305 in the stainless steel range.

Dimensions:
The design of the conveyor system and the load capacity of the axle determine the axle dimensions.

Axle dimension in mm	Rotary axle	Hexagonal axle
5	x
6	x
8	x
ASK 8		x
10	x
ASK 11		x
12	x
14	x
15	x
17	x
20	x
25	x

Axle design: Rollex support rollers are available with different axle designs. This ensures optimum adaptation to the respective requirements.

	A.M	A. AGM	A. IGM	A. smooth	A. SW	A. FA
Axle-Ø
5				6		6
6	M6×15			8		8
8	M8×15		M5×10	10		10
ASK 8						10
10	M10×15	M8×15	M6×10	10	SW8×10	10
ASK 11						10
12	M12×15	M10×15	M8×10	10	SW10×10	10
14	M14×20	M12×15	M8×15 M10×15	10	SW12×10	10
15	M14×20		M8×15 M10×15		SW12×10
17	M17×20	M12×15	M10×15 M12×18		SW14×10
20	M20×25	M16×20	M10×15 M12×18		SW14/15×10 SW14/15×13
25		M16×20	M16×24		SW18×10/13

Material: Axle caps made of thermoplastic materials serve as corrosion protection and reduce noise.

Axle-Ø
8	SW10×10 D=12 SW14×10 D=16	SK11×11 SK11×11 FA	SK11×17
10	SW21×10 D=12 SW14×10 D=16
12	SW17×10 D=16
20				SW30×12 D=36*

Axle design

Drive components

Bearing type

Bearing sheet

Gravity Rollers

Gravity rollers, consisting of bearing, axle and tube, must be designed to meet the requirements, paying particular attention to the adequate dimensioning of the weakest element in order to guarantee reliability and durability.

	Typ 50	Typ 60	Typ 100	Typ 150	Typ 151	Typ 200	Typ 220	Typ 250	Typ 260	Typ 290	Typ 300	Typ 301	Typ 302	Typ 320	Typ 400	Typ 400 ST	Typ 401	Typ 402	Typ 402 K	Typ 402 ST	Typ 402 WO	Typ 402 WS	Typ 402 WST	Typ 402 WT
Application	light	light	light	light	light	medium	heavy	heavy	heavy	heavy	medium	medium	medium	medium	heavy	heavy	medium	heavy	—	—	heavy	heavy	heavy	heavy
Tube-Ø	16–40 mm	30–40 mm	50–63 mm	50–63 mm	50–63 mm	30–80 mm	50–80 mm	40–80 mm	64–108 mm	40–90 mm	50–90 mm	50–89 mm	50–60 mm	40–50 mm	50–133 mm	64–133 mm	40–50 mm	40–108 mm	40–50 mm	64–133 mm	63–133 mm	64–133 mm	80–133 mm	50–89 mm
Tube material	Steel Plastic	Steel Plastic	Steel Plastic Niro	Steel Plastic Niro	Steel Plastic Niro	Steel Plastic Niro	Steel Plastic Niro	Steel Plastic	Steel Plastic	Steel Niro	Steel Plastic Niro	Steel Plastic Niro	Steel Niro	Steel Plastic Niro	Steel Plastic Niro	Steel Niro	Steel Niro	Steel Niro	Steel Niro	Steel Niro	Steel Niro	Steel Niro	Steel Niro	Steel Niro
Material bearing	Plastic	Plastic	Plastic	Plastic	Plastic	Steel	Steel	Steel	Steel	Steel	Plastic	Plastic	Plastic	Plastic	Plastic	Steel	Plastic	Plastic	Steel	Steel	Steel	Steel	Steel	Steel
Bearing load capacity	100 N	600 N	200 N	150 N	150 N	1600 N	2400 N	2400 N	5000 N	1200 N	1600 N	1600 N	1600 N	1200 N	3600 N	—	1600 N	3600 N	—	—	3600 N	6000 N	3600 N	2400 N
Roller base	Spherical row	Precision ball bearing	Spherical row	Plain bearing	Plain bearing	Spherical row	Spherical row	Precision ball bearing	Precision ball bearing	Precision ball bearing	Precision ball bearing	Precision ball bearing	Precision ball bearing	Precision ball bearing	Precision ball bearing	Precision ball bearing	Precision ball bearing	Precision ball bearing	Precision ball bearing	Precision ball bearing	Precision ball bearing	Precision ball bearing	Precision ball bearing	Precision ball bearing
Data sheet

Driven Rollers

Our driven rollers, consisting of drive, bearing, axle and tube, require dimensioning based on the requirements, especially of the weakest element, to ensure optimum performance and durability.

	Typ 306	Typ 306	Typ 306	Typ 307	Typ 307	Typ 307	Typ 308	Typ 308	Typ 308	Typ 309	Typ 309	Typ 309	Typ 420	Typ 432	Typ 433	Typ 435	Typ 437	Typ 445	Typ 445 RS	Typ 447	Typ 450	Typ 452	Typ 454	Typ 454 R	Typ 456	Typ 457	Typ 462/46	Typ 462 R	Typ 464	Typ 470	Typ 480	Typ 500	Typ 500 R	Typ 502	Typ 506	Typ 506 R	Typ 508	Typ 510	Typ 511	Typ 512	Typ 513	Typ 516	Typ 517 z24	Typ 517 z30	Typ 518	Typ 519	Typ 520	Typ 520 R	Typ 521	Typ 521 R	Typ 522	Typ 523	Typ 533 Rz	Typ 534 z3	Typ 539
Application	light	medium	heavy	light	medium	heavy	light	medium	heavy	light	medium	heavy	medium	light	light	light	light	medium	medium	medium	light	light	medium	medium	—	medium	medium	medium	medium	light	light	medium	medium	medium	medium	medium	medium	heavy	heavy	heavy	heavy	medium	medium	medium	medium	medium	medium	medium	medium	medium	medium	medium	medium	heavy	heavy
Tube-Ø	30–108 mm	30–108 mm	30–108 mm	30–108 mm	30–108 mm	30–108 mm	30–108 mm	30–108 mm	30–108 mm	30–108 mm	30–108 mm	30–108 mm	50–50 mm	30–32 mm	30–32 mm	30–32 mm	30–32 mm	50–80 mm	50–80 mm	50–89 mm	50–90 mm	50–90 mm	50–90 mm	50–80 mm	50–80 mm	50–90 mm	50–90 mm	50–80 mm	50–89 mm	50–90 mm	50–90 mm	50–90 mm	50–80 mm	40–89 mm	50–90 mm	50–80 mm	50–108 mm	64–133 mm	64–133 mm	80–133 mm	80–133 mm	80–108 mm	80–108 mm	80–89 mm	80–108 mm	80–108 mm	80–108 mm	80–108 mm	80–108 mm	80–108 mm	80–89 mm	80–89 mm	80–108 mm	89–133 mm	80–133 mm
Tube material	Steel Plastic	Steel Plastic	Steel Plastic	Steel Plastic	Steel Plastic	Steel Plastic	Steel Plastic	Steel Plastic	Steel Plastic	Steel Plastic	Steel Plastic	Steel Plastic	Steel Niro	Steel Plastic Niro	Steel Plastic Niro	Steel Plastic Niro	Steel Plastic Niro	Steel Plastic Niro	Steel Plastic Niro	Steel Niro	Steel Plastic Niro	Steel Plastic Niro	Steel Plastic Niro	Steel Plastic Niro	—	Steel Plastic Niro	Steel Plastic Niro	Steel Plastic Niro	Steel Niro	Steel Plastic Niro	Steel Plastic Niro	Steel Plastic Niro	Steel Plastic Niro	Steel Niro	Steel Plastic Niro	Steel Plastic Niro	Steel Niro	Steel Niro	Steel Niro	Steel Niro	Steel Niro	Steel Niro	Steel Niro	Steel Niro	Steel Niro	Steel Niro	Steel Niro	Steel Niro	Steel Niro	Steel Niro	Steel Niro	Steel Niro	Steel Niro	Steel Niro	Steel Niro
Load capacity castor	Depending on the bearing	Depending on the bearing	Depending on the bearing	Depending on the bearing	Depending on the bearing	Depending on the bearing	Depending on the bearing	Depending on the bearing	Depending on the bearing	Depending on the bearing	Depending on the bearing	Depending on the bearing	500 N	400 N	400 N	400 N	400 N	600 N	1000 N	1500 N	400 N	400 N	1000 N	1000 N	1000 N	1000 N	1000 N	1000 N	1500 N	400 N	400 N	1000 N	1000 N	1500 N	1000 N	1000 N	1500 N	3400 N	3400 N	4000 N	4000 N	1800 N	1200 N	1800 N	1800 N	1800 N	1800 N	1800 N	1800 N	1800 N	1200 N	800 N	1800 N	2000 N	2000 N
Drive element	—	—	—	—	—	—	—	—	—	—	—	—	Plastic	Steel	Steel	Steel	Steel	Plastic	Steel	Steel	Plastic	Plastic	Steel	Steel	Steel	Steel	Steel	Steel	Steel	Plastic	Plastic	Steel	Steel	Steel	Steel	Steel	Steel	Steel	Steel	Steel	Steel	Plastic	Plastic	Plastic	Plastic	Plastic	Steel	Steel	Steel	Steel	Plastic	Plastic	Steel	Steel	Steel
Drive type	Round belt	Round belt	Round belt	Round belt	Round belt	Round belt	Round belt	Round belt	Round belt	Round belt	Round belt	Round belt	Fixed drive	Adjustable accumulation drive	Fixed drive	Accumulation and fixed drive	Accumulation and fixed drive	Accumulation and fixed drive	Accumulation and fixed drive	Fixed drive	Accumulation and fixed drive	Accumulation and fixed drive	Accumulation and fixed drive	Accumulation and fixed drive	Fixed drive	Accumulation and fixed drive	Accumulation and fixed drive	Adjustable accumulation drive	Fixed drive	Accumulation and fixed drive	Accumulation and fixed drive	Accumulation and fixed drive	Adjustable accumulation drive	Fixed drive	Accumulation and fixed drive	Accumulation and fixed drive	Fixed drive	Fixed drive	Fixed drive	Fixed drive	Fixed drive	Fixed drive	Fixed drive	Fixed drive	Fixed drive	Fixed drive	Adjustable accumulation drive	Adjustable accumulation drive	Adjustable accumulation drive	Adjustable accumulation drive	Fixed drive	Fixed drive	Adjustable accumulation drive	Fixed drive	Fixed drive
Drive design	1 bead	1 bead	1 bead	2 beads	2 beads	2 beads	3 beads	3 beads	3 beads	4 beads	4 beads	4 beads	Poly V	Double sprocket z12 3/8×7/32 06 B1 9,525×5,72	Double sprocket z12 3/8×7/32 06 B1 9,525×5,72	Single sprocket z10 Drive sprocket toothing 3/8×7/32 06 B1 9,525×5,72	Single sprocket z10 Drive sprocket toothing 3/8×7/32 06 B1 9,525×5,72	z20 8M-11.2 mm Poly Chain	z20 8M-11.2 mm Poly Chain	z20 8M-11.2 mm Poly Chain	Single sprocket z11 Drive sprocket toothing Single sprocket z9 Drive sprocket toothing 1/2×5/16 08 B1 12,7×7,75	Single sprocket z11 Drive sprocket toothing 1/2×5/16 08 B1 12,7×7,75	Single sprocket z11 Drive sprocket toothing 1/2×5/16 08 B1 12,7×7,75	Single sprocket z11 Drive sprocket toothing 1/2×5/16 08 B1 12,7×7,75	Single sprocket z11 Drive sprocket toothing 1/2×5/16 08 B1 12,7×7,75	Single sprocket z11 Standard toothing 1/2×5/16 08 B1 12,7×7,75	Single sprocket z12 Drive sprocket toothing 5/8×3/8 10 B1 15,875×9,65	Single sprocket z12 Drive sprocket toothing 5/8×3/8 10 B1 15,875×9,65	Single sprocket z12 Drive sprocket toothing 5/8×3/8 10 B1 15,875×9,65	Single sprocket z14 Drive sprocket toothing 1/2×5/16 08 B1 12,7×7,75	Double sprocket z14 Standard toothing 1/2×5/16 08 B1 12,7×7,75	Double sprocket z14 Standard toothing 1/2×5/16 08 B1 12,7×7,75	Double sprocket z14 Standard toothing 1/2×5/16 08 B1 12,7×7,75	Double sprocket z14 Standard toothing 1/2×5/16 08 B1 12,7×7,75	Single sprocket z14 Drive sprocket toothing 1/2×5/16 08 B1 12,7×7,75	Single sprocket z14 Drive sprocket toothing 1/2×5/16 08 B1 12,7×7,75	Single sprocket z14 Drive sprocket toothing 1/2×5/16 08 B1 12,7×7,75	Double sprocket z15 or z13 Standard toothing 5/8×3/8 10 B1 15,875×9,65	Single sprocket z15 or z13 Drive sprocket toothing 5/8×3/8 10 B1 15,875×9,65	Double sprocket z13 Standard toothing 3/4×7/16 12 B1 19,05×11,68	Single sprocket z13 Drive sprocket toothing 3/4×7/16 12 B1 19,05×11,68	z30 8M-21 mm Poly chain	z24 or z25 8M–25 mm HTD	z30 or z34 8M–30 mm HTD	Double sprocket z18 Standard toothing 5/8×3/8 10 B1 15,875×9,65	Single sprocket z18 Standard toothing 5/8×3/8 10 B1 15,875×9,65	Double sprocket z15 Standard toothing 5/8×3/8 10 B1 15,875×9,65	Double sprocket z15 Standard toothing 5/8×3/8 10 B1 15,875×9,65	Single sprocket z15 Drive sprocket toothing 5/8×3/8 10 B1 15,875×9,65	Single sprocket z15 Drive sprocket toothing 5/8×3/8 10 B1 15,875×9,65	Double sprocket z15 Standard toothing 5/8×3/8 10 B1 15,875×9,65	Single sprocket z15 Standard toothing 5/8×3/8 10 B1 15,875×9,65	z30 or z34 8M–30 mm HTD	z30 or z34 8M–30 mm HTD	V-ribbed belt pulley, PK-reference (DIN9982)
Data sheet

Conical Rollers

Conical rollers, consisting of a bearing, axle, tube, conical elements and, if necessary, a drive, require dimensioning based on the requirements, especially of the weakest component, in order to ensure long-lasting and high performance.

	Typ 541	Typ 543	Typ 551	Typ 553	Typ 563	Typ 566	Typ 568	Typ 570	Typ 600	Typ 601	Typ 602
Application	medium	medium	medium	medium	light	light			light	light	light
Tube-Ø	50–50 mm	50–50 mm	50–50 mm	50–50 mm	20–20 mm	30–30 mm	50–50 mm	50–50 mm	50–50 mm	20–20mm	30–30 mm
Tube material	Steel Plastic Niro	Steel Plastic Niro	Steel Plastic Niro	Steel Plastic Niro	Steel Plastic Niro	Steel Niro	Kunststoff		Steel Plastic Niro	Steel Plastic Niro	Steel Plastic Niro
Portable roller	400 N	400 N	400 N	400 N	100 N	200 N	400 N	300 N	400 N	100 N	100 N
Drive element	Plastic	Plastic	Steel	Steel	Steel	Steel	Plastic	Plastic	Steel	—	—
Drive design	Double sprocket z14 Standard toothing 1/2×5/16 08 B1 12,7×7,75	Double sprocket z14 Standard toothing 1/2×5/16 08 B1 12,7×7,75	Double sprocket z14 Standard toothing 1/2×5/16 08 B1 12,7×7,75	Single sprocket z14 Drive sprocket toothing 1/2×5/16 08 B1 12,7×7,76	Double sprocket z12 Standard toothing 3/8×7/32 06 B1 9,525×5,72	Double sprocket z12 Standard toothing 3/8×7/32 06 B1 9,525×5,73	V-ribbed belt pulley PJ Toothing	Plastic round belt pulley with 2 beads	—	—	—
Driven roller/gravity roller	Driven	Driven	Driven	Driven	Driven	Driven	Driven	Driven	Gravity	Gravity	Gravity
Inner diameter	800	800	800	800	373	500			800	373	500
Data sheet

Belt Rollers

Rollex supplies standardized belt rollers and conveyor belt pulleys, specially designed for efficient conveyor belt stations.

	Typ 400	Typ 400 A	Typ 402 ST	Typ 402 WO
Typ	Idlers for conveyor belt stations	Conveyor belt pulley	Conveyor belt pulley	Idlers for conveyor belt stations
Tube diameter	50–133 mm	on request	63–133 mm	80–133 mm
Data sheet

Brake Rollers

Brake rollers - indispensable in gravity applications

Rollex enables safe and cost-effective braking of goods on gravity roller conveyors by means of direct and indirect acting braking elements.

Our brake rollers are characterized by a spring suspension that constantly presses against the conveyed goods, even on slightly uneven surfaces. Various factors such as roller conveyor design, inclination, transport goods properties and environmental influences affect the choice of brake roller type and spacing. Each pallet location requires at least one brake roller to ensure a controlled speed.

Indirect braking is implemented using two support rollers and is particularly suitable when a narrow center distance is required.

	Typ 700-80	Typ 710-120	Typ 710-86
Principle	Brake support roller	Brake roller indirect	Brake roller indirect
Tube diameter	80	120	86
Weight of conveyed goods up to	1000 kg	1000 kg	500 kg
Data sheet

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