RETURN ROLLERS
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- Idler tube made of longitudinal seam-welded steel tubes acc. to EN 10305-3, S235JR acc. to EN 10025-2
- Bearing housings made of deep-drawn sheet steel DD13 acc. to EN 10111
- Bearing housings with seat IT7 acc. to EN ISO 286-1
- Axles made of round bar steel acc. to DIN EN 10277; seat IT9 – EN ISO 286-1
- Deep-groove ball bearings AKT acc. to DIN 625-1 2Z, plastic cage, greased for life to 50 – 60% of bearing’s free internal volume
- Bearing sizes 6204 – 6306
- Patented QLR Hybrid Sealing, greased for life, especially effective against the intrusion of water and dust
- Support rings made of rubber, alternatively PU
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- Idler tube made of longitudinal seam-welded steel tubes acc. to EN 10305-3, with restricted tolerances (Küpper Standard), S235JR acc. to EN 10025-2
- Forged bearing housings C15 acc. to EN 10267-2 or S235JR acc. to EN 10025-2 / Bearing housing made of deep-drawn sheet steel EN-GJL-200 acc. to EN 1561
- Seat IT7 acc. to EN ISO 286-1
- Axles made of round bar steel acc. to EN 10083-2 or bending-resistant hollow axle, precision tube with welded shaft extensions; seat IT6 acc. to EN ISO 286-1
- Deep-groove ball bearings AKT acc. to DIN 625-1 2Z, plastic cage, greased for life 50 – 60% of bearing’s free internal volume
- Bearing sizes 6306 – 6310
- ISO tolerance class P0 acc. to DIN 620-2
- Radial internal clearance C4 acc. to DIN 620-4
- Patented QLR Hybrid Sealing, greased for life, especially effective against the intrusion of water and dust
- Available with PU Support rings or segmented rings
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- Idler tube made of longitudinal seam-welded steel tubes acc. to EN 10305-3 with restricted tolerances (Küpper Standard), S235JR acc. to EN 10025-2
- Bearing housings forged from C15 acc. to EN 10267-2 or S235JR acc. to EN 10025-2
- Seat IT7 acc. to EN ISO 286-1
- Axles made of round bar steel acc. to EN 10083-2 or bending-resistant hollow axle, precision tube with welded shaft extensions; seat IT6 acc. to EN ISO 286-1
- Deep-groove ball bearings AKT acc. to DIN 625-1 2Z, plastic cage, greased for life, lubrication
designed to customer specifications - Bearing sizes 6306 – 6310
- ISO tolerance class 5 (P5) acc. to DIN 620-2
- Radial internal clearance for deep-groove ball bearings C4H acc. to DIN 620-4
- Additional inner sealing made of high-quality materials
- Patented QLR Hybrid Sealing, greased for life, especially effective against the intrusion of water and dust
- PU cast-in shell
| Comparison | |||
|---|---|---|---|
| Idler tube | |||
| Tubes | Welded cold-sized steel tubes acc. to EN 10305-3 | Welded cold-sized steel tubes acc. to EN 10305-3; with restricted tolerances (Küpper Standard) | Welded cold-sized steel tubes acc. to EN 10305-3; with restricted tolerances (Küpper Standard) |
| Materials | S235JR acc. to EN 10025-2 | S235JR acc. to EN 10025-2 | S235JR acc. to EN 10025-2 |
| Bearing housing | |||
| Typ | Deep-drawn part | Forged part, cast part | Forged part |
| Materials | DD13 acc. to EN 10111 | C15 acc. to EN 10267-2 or S235JR acc. to EN 10025-2 or EN-GJL-200 acc. to EN 1561 | C15 acc. to EN 10267-2 or S235JR acc. to EN 10025-2 |
| Bearing seat | IT7 | IT7 | IT7 |
| Axles | |||
| Type | Solid | Solid or bending-resistant hollow axle | Solid or bending-resistant hollow axle |
| Materials | Round bar steel acc. co EN 10277 | Round bar steel acc. to EN 10083-2 / Tube acc. to EN 10305-3 | Round bar steel acc. to EN 10083-2 / Tube acc. to EN 10305-3 |
| Bearing seat | IT9 | IT6 | IT6 |
| Bearings | |||
| Manufacturer | AKT | AKT | AKT |
| Type of bearing | Deep-grove ball bearings | Deep-grove ball bearings | Deep-grove ball bearings |
| Bearing sizes | 6204 - 6306 | 6306 - 6310 | 6306 - 6310 |
| Sealing | 2Z | 2Z | 2Z |
| Radial internal clearance | C4 | C4 | C4H |
| Tolerance class | P0 | P0 | P5 |
| Cage | Plastic cage | Plastic cage | Plastic cage |
| Lubrication | 50 – 60 % of bearing’s free internal volume | 50 – 60 % of bearing’s free internal volume | Designed to customer specifications |
| Sealing | |||
| Type | QLR Hybrid Sealing | QLR Hybrid Sealing | QLR Hybrid Sealing |
| Support ring / Coating | |||
| Type | Support rings | Support rings or segmented rings | Cast-in shell |
| Materials | Rubber or PU | PU | PU |
