Carrying 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 housing made of deep-drawn sheet steel DD13 acc. to EN 10111
- Bearing housing with seat IT7 acc. to EN ISO 286-1
- Axles made of bright-drawn round bar steel acc. to DIN EN 10277; seat IT9 acc. to 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
- True running 0.7 mm/m (average of the total delivery)
- Balace quality ≤ G40 acc. to ISO 1940
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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 C15 acc. to EN 10267-2 or S235JR acc. to EN 10025-2 / bearing housings cast from 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-in shaft extensions; seats IT6 acc. to 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 – 6312
- 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
- True running 0.5 mm/m (average of the total delivery)
- Balace quality ≤ G25 acc. to ISO 1940
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- Idler tube machine-turned, surface roughness Ra=12.5 μm, made of longitudinal seam-welded steel tubes acc. to EN 10305-3
- With restricted tolerances (Küpper Standard), S235JR acc. to EN 10025-2; true running ≤ 0.2 mm/m (average of the total delivery)
- 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
- Deep-groove ball bearings 6306 – 6312
- Bearings ISO tolerance class P5 acc. to DIN 620-2
- Radial internal clearance of the deep-groove ball bearings C4H acc. to DIN 620-4
- Self-aligning roller bearings AKT acc. to DIN 635-1, with steel or brass cage, lubrication designed to customer specifications
- Self-aligning roller bearings 21312 - 22312
- Self-aligning roller bearings ISO tolerance class P0 acc. to DIN 620-2
- Radial internal clearance of the self-aligning roller bearings C3 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
- Additional protection against extreme conditions by use of a steel sheet dust cover and water protection cap
- Sound-optimized through a vibration-insolating ring
- Balance quality ≤ G14 acc. to ISO 1940
| COMPARISON | ||||||
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| 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 nach EN 10025-2 | S235JR nach EN 10025-2 | S235JR nach EN 10025-2 | |||
| Bearing housing | ||||||
| Type | 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. to 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 | |||
| Bearing | ||||||
| Manufacturer | AKT | AKT | AKT | |||
| Type of bearing | Deep-groove ball bearings | Deep-groove ball bearings |
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| Bearing sizes | 6204 - 6306 | 6304 - 6312 |
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| Sealing | 2Z | 2Z |
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| Radial internal clearance | C4 | C4 |
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| Tolerance class | P0 | P0 |
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| Cage | Plastic cage | Plastic cage |
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| 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, steel sheet dust cover, water protection cap |
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| Running characteristics | ||||||
| True running [mm/m] | 0,7* | 0,5* | ≤ 0,2 | |||
| Balance quality | ≤ G40 acc. to ISO 1940** | ≤ G25 acc. to ISO 1940** | ≤ G14 acc. to ISO 1940*** | |||
| * ** *** |
Average of the total delivery Belt speed 3 m/s Belt speed max. 10 m/s |
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