NAFLU200 Series 2-Bolt Flange Bearing Units — Eccentric Collar, Extended Housing Height
The NAFLU200 series is the two-bolt oval flange equivalent of the NAFS200 square four-bolt extended housing series. It addresses the same dimensional problem: the wide inner ring of the NA eccentric collar insert bearing can protrude beyond the face of a standard-height oval flange housing at larger bore sizes, creating clearance conflicts with adjacent couplings, guards, and machine frame members. The NAFLU200 housing is taller (higher H dimension) than the NAFL200 at equivalent bore sizes, fully enclosing the extended inner ring within the housing profile at all bore sizes from NAFLU201 to NAFLU215.
Key Features
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Extended Housing Height
Higher H than NAFL200 at equivalent bore sizes. Wide inner ring fully enclosed within housing profile. No protrusion past the oval flange face.
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Eccentric Collar Self-Tightening
Same NA series eccentric collar insert as NAFL200. Tightens under unidirectional rotation. For single-direction drives only.
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NAFLU201S–203S Slim Variant
Slim S-series for 12–17 mm bore where the compact profile is acceptable and protrusion is not a concern.
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Metric and Inch Bore
12–75 mm metric bore with inch bore variants per housing size.
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Solid Base Option
Hollow base standard. Solid base (SB) on request.
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GB / ISO / ANSI / JIS Compliant
Drop-in replacement for NAFLU200-pattern extended housing oval flange units.
Full Dimensional Specifications
| Unit No. | d mm | d inch | H mm | J mm | L mm | A2 mm | A1 mm | A mm | N mm | B1 mm | S mm | Z mm | Bolt | kg |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NAFLU201S~203S | 12~17 | 1/2~11/16 | 99 | 76.5 | 57 | 15 | 11 | 24.5 | 11.5 | 37.3 | 13.9 | 38.4 | M10 | 0.66 |
| NAFLU201~204 / 201-8~204-12 | 12~20 | 1/2~3/4 | 112.5 | 90 | 61 | 19 | 15 | 29.5 | 11.5 | 43.7 | 17 | 45.5 | M10 | 0.73 |
| NAFLU205 / 205-14~16 | 25 | 7/8~1 | 123 | 99 | 70 | 19 | 15 | 30 | 11.5 | 44.4 | 17.4 | 45.9 | M10 | 0.80 |
| NAFLU206 / 206-18~20 | 30 | 1-1/8~1-1/4 | 142 | 116.5 | 82 | 20 | 13 | 32.5 | 11.5 | 48.4 | 18.2 | 50.1 | M10 | 1.20 |
| NAFLU207 / 207-20~23 | 35 | 1-1/4~1-7/16 | 158 | 130 | 94 | 21 | 17 | 36 | 14 | 51.1 | 18.8 | 53.3 | M12 | 1.60 |
| NAFLU208 / 208-24/25 | 40 | 1-1/2~1-9/16 | 172 | 143.5 | 103 | 24 | 17 | 39 | 14 | 56.3 | 21.4 | 58.9 | M12 | 1.90 |
| NAFLU209 / 209-26~28 | 45 | 1-5/8~1-3/4 | 180 | 148.5 | 108 | 24 | 18 | 40 | 16 | 56.3 | 21.4 | 58.9 | M14 | 2.30 |
| NAFLU210 / 210-30~32 | 50 | 1-7/8~2 | 190 | 157 | 114 | 28 | 20 | 45 | 18 | 62.7 | 24.6 | 66.1 | M16 | 2.60 |
| NAFLU211 / 211-32~35 | 55 | 2~2-3/16 | 217 | 184 | 128 | 31 | 21 | 48 | 18 | 71.4 | 27.7 | 74.6 | M16 | 3.80 |
| NAFLU212 / 212-36~39 | 60 | 2-1/4~2-7/16 | 237 | 202 | 138 | 34 | 21 | 53 | 18 | 77.8 | 30.9 | 80.8 | M16 | 4.80 |
| NAFLU213 / 213-40 | 65 | 2-1/2 | 256 | 210 | 152 | 38 | 22 | 56 | 21 | 85.7 | 34.1 | 89.6 | M18 | 6.00 |
| NAFLU214 / 214-44 | 70 | 2-3/4 | 264 | 216 | 157 | 38 | 23 | 58 | 21 | 85.7 | 34.1 | 89.6 | M18 | 6.30 |
| NAFLU215 / 215-47/48 | 75 | 2-15/16~3 | 275 | 225 | 164 | 41 | 24 | 62 | 21 | 92.1 | 37.3 | 95.8 | M18 | 7.20 |
→ Scroll horizontally to view all columns. Catalogue dimensions for reference only — engineering drawings required before order.
H = total height (taller than NAFL200 at same bore to enclose inner ring). L = overall length of oval housing. B1 = eccentric collar insert width. Solid base: suffix SB. Eccentric collar lock direction must match shaft rotation direction.
Applications
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Coupling-Adjacent Oval Flange Positions
Oval flange bearing positions immediately adjacent to shaft couplings where the coupling hub or flange runs close to the bearing housing face and a standard NAFL200 inner ring protrusion would cause interference.
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Guarded Oval Flange Drive Supports
Oval flange shaft supports inside safety guards where the guard profile clears the housing body and a protruding inner ring would require guard modification or create a contact risk.
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Enclosed Agricultural Frame Oval Flanges
Oval flange shaft supports inside enclosed implement frame panels where the wide inner ring must be contained within the housing profile to fit between the panel face and adjacent internal components.
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Sealed Enclosure Oval Flange Positions
Oval flange supports on sealed process equipment where any protruding component creates a contamination entry point at the panel penetration.
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Compact Machine Oval Flange Drives
Drive shaft oval flange supports on compact machinery where the machine depth is controlled and any axial protrusion of the bearing inner ring beyond the panel face creates a clearance violation.
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Upgrade from NAFL200 Where Protrusion Is a Problem
Insert-compatible housing upgrade from NAFL200 where field installation shows inner ring protrusion creating interference. Replace housing; insert bearing unchanged.
📦 MOQ & Order Information
- Standard parts: quantity-based MOQ applies per model number.
- High-value / large items: minimum order by USD order value.
- New-client samples: 1–5 pcs available at sample price for first-time buyers.
- Multi-model combines: aggregate orders of USD 1,500 or more across models accepted.
- Special materials / processes: subject to process MOQ — confirm at inquiry stage.
- Retail (1–2 pcs): not accepted. Minimum sample order is 1–5 pcs at sample pricing.
Engineering drawings must be submitted and approved before order confirmation. Catalogue dimensions are for reference only.
Frequently Asked Questions
Difference between NAFL200 and NAFLU200?
NAFLU200 taller housing (higher H) fully encloses wide inner ring. NAFL200 standard height may show protrusion at larger bores.
Can NAFLU200 be used on a reversing drive?
No — same eccentric collar as NAFL200. Use UCFL200 or UEFL200 for reversing.
Same bolt pattern as NAFL200?
Yes for J and bolt size. H is taller but bolt positions unchanged.
What is the MOQ?
Standard parts: quantity-based MOQ. Samples 1–5 pcs. Multi-model from USD 1,500. Retail 1–2 pcs not accepted.
Request a Quote for NAFLU200 Series
Provide shaft diameter, rotation direction, bore type, and confirm whether inner ring clearance is a constraint in the installation. Contact us.
