UC Series Insert Bearings
UC series insert bearings are widely used in mounted bearing units and replacement applications.
UC series insert bearings feature a spherical outer-ring design for self-alignment under minor shaft misalignment. Covering shaft sizes from 12 mm to 140 mm (UC201–UC328), they serve as the core insert inside UCP pillow block, UCF square flange, UCFL 2-bolt flange, and UCT take-up units. CTZ manufactures UC bearings with set-screw or eccentric locking, standard international mounting dimensions, and ISO 9001 quality control.
Product Dimension Drawing
Download or view the UC series insert bearing dimension drawing and technical data for model selection.
UC Series Insert Bearing Specifications
| Model | d (mm) | d (in.) | D (mm) | B (mm) | Mass (kg) |
|---|---|---|---|---|---|
| UC202 | 15 | 5/8" | 40 | 27.4 | 0.12 |
| RB202-10 | 15.875 | 5/8" | 40 | 27.4 | 0.11 |
| UC203 | 17 | 11/16" | 40 | 27.4 | 0.11 |
| UC203-11 | 17.462 | 11/16" | 40 | 27.4 | 0.11 |
| UC204-12 | 19.05 | 3/4" | 47 | 31 | 0.19 |
| RB204 | 20 | 3/4" | 47 | 31 | 0.18 |
| UC205-14 | 22.225 | 7/8" | 52 | 34.1 | 0.22 |
| UC205-15 | 23.813 | 15/16" | 52 | 34.1 | 0.22 |
| UC205 | 25 | 1" | 52 | 34.1 | 0.22 |
| UC205-16 | 25.4 | 1" | 52 | 34.1 | 0.23 |
| UC206-18 | 28.575 | 1-1/8" | 62 | 38.1 | 0.34 |
| RB206 | 30 | 1-3/16" | 62 | 38.1 | 0.36 |
| UC206-19 | 30.163 | 1-3/16" | 62 | 38.1 | 0.34 |
| UC206-20 | 31.75 | 1-1/4" | 62 | 38.1 | 0.34 |
| UC207-20 | 31.75 | 1-1/4" | 72 | 42.9 | 0.53 |
| RB207-21 | 33.337 | 1-5/16" | 72 | 42.9 | 0.59 |
| UC207-22 | 34.925 | 1-3/8" | 72 | 42.9 | 0.51 |
| UC207-23 | 36.513 | 1-7/16" | 72 | 42.9 | 0.56 |
| UC208-24 | 38.1 | 1-1/2" | 80 | 49.2 | 0.68 |
| RB208-25 | 39.688 | 1-9/16" | 80 | 49.2 | 0.74 |
| UC209-26 | 41.275 | 1-5/8" | 85 | 49.2 | 0.78 |
| UC209-27 | 42.862 | 1-11/16" | 85 | 49.2 | 0.85 |
| UC209-28 | 44.45 | 1-3/4" | 85 | 49.2 | 0.81 |
| UC209 | 45 | 1-3/4" | 85 | 49.2 | 0.74 |
| UC210-30 | 47.625 | 1-7/8" | 90 | 51.6 | 0.87 |
| RB210-31 | 49.212 | 1-15/16" | 90 | 51.6 | 0.96 |
| UC210-32 | 50.8 | 2" | 90 | 51.6 | 0.9 |
| UC210 | 50 | 2" | 90 | 51.6 | 0.8 |
| UC211-32 | 50.8 | 2" | 100 | 55.6 | 1.27 |
| RB211-34 | 53.975 | 2-1/8" | 100 | 55.6 | 1.4 |
| UC211-35 | 55.563 | 2-3/16" | 100 | 55.6 | 1.17 |
| UC211 | 55 | 2-3/16" | 100 | 55.6 | 1.1 |
| UC212-36 | 57.15 | 2-1/4" | 110 | 65.1 | 1.53 |
| RB212 | 60 | 2-3/8" | 110 | 65.1 | 1.74 |
| UC212-38 | 60.325 | 2-3/8" | 110 | 65.1 | 1.53 |
| UC212-39 | 61.913 | 2-7/16" | 110 | 65.1 | 1.45 |
| UC213-40 | 63.5 | 2-1/2" | 120 | 65.1 | 1.94 |
| UC213 | 65 | 2-1/2" | 120 | 65.1 | 1.86 |
| UC214-44 | 69.85 | 2-3/4" | 125 | 74.6 | 2.06 |
| UC214 | 70 | 2-3/4" | 125 | 74.6 | 2.06 |
| UC215-48 | 76.2 | 3" | 130 | 77.8 | 2.3 |
| UC215 | 75 | 3" | 130 | 77.8 | 2.21 |
| UC216 | 80 | 3-1/8" | 140 | 82.6 | 2.79 |
| UC217-52 | 82.55 | 3-1/4" | 150 | 85.7 | 3.6 |
| UC217 | 85 | 3-1/4" | 150 | 85.7 | 3.38 |
| UC218-56 | 88.9 | 3-1/2" | 160 | 96 | 4.56 |
| UC218 | 90 | 3-1/2" | 160 | 96 | 4.45 |
| UC305-14 | 22.225 | 7/8" | 62 | 38 | 0.38 |
| UC305-15 | 23.813 | 15/16" | 62 | 38 | 0.36 |
| UC305 | 25 | 1" | 62 | 38 | 0.35 |
| UC305-16 | 25.4 | 1" | 62 | 38 | 0.36 |
| UC306-18 | 28.575 | 1-1/8" | 72 | 43 | 0.58 |
| UC306 | 30 | 1-3/16" | 72 | 43 | 0.56 |
| UC306-19 | 30.163 | 1-3/16" | 72 | 43 | 0.56 |
| UC306-20 | 31.75 | 1-1/4" | 72 | 43 | 0.77 |
| UC307-20 | 31.75 | 1-1/4" | 80 | 48 | 0.71 |
| UC307-21 | 33.337 | 1-5/16" | 80 | 48 | 0.71 |
| UC307-22 | 34.925 | 1-3/8" | 80 | 48 | 0.71 |
| UC307-23 | 36.513 | 1-7/16" | 80 | 48 | 0.71 |
| UC308-24 | 38.1 | 1-1/2" | 90 | 52 | 1 |
| UC308-25 | 39.688 | 1-9/16" | 90 | 52 | 0.98 |
| UC308-26 | 41.275 | 1-5/8" | 90 | 52 | 0.96 |
| UC308 | 40 | 1-1/2" | 90 | 52 | 0.96 |
| UC309-26 | 41.275 | 1-5/8" | 100 | 57 | 1.36 |
| UC309-27 | 42.862 | 1-11/16" | 100 | 57 | 1.33 |
| UC309-28 | 44.45 | 1-3/4" | 100 | 57 | 1.3 |
| UC309-29 | 46.038 | 1-13/16" | 100 | 57 | 1.28 |
| UC309 | 45 | 1-3/4" | 100 | 57 | 1.28 |
| UC310-30 | 47.625 | 1-7/8" | 110 | 61 | 1.74 |
| UC310-31 | 49.212 | 1-15/16" | 110 | 61 | 1.68 |
| UC310-32 | 50.8 | 2" | 110 | 61 | 1.65 |
| UC310 | 50 | 2" | 110 | 61 | 1.65 |
| UC311-32 | 50.8 | 2" | 120 | 66 | 2.08 |
| UC311-34 | 53.975 | 2-1/8" | 120 | 66 | 1.9 |
| UC311 | 55 | 2-3/16" | 120 | 66 | 1.87 |
| UC311-35 | 55.563 | 2-3/16" | 120 | 66 | 1.9 |
| UC312-36 | 57.15 | 2-1/4" | 130 | 71 | 2.65 |
| UC312 | 60 | 2-3/8" | 130 | 71 | 2.6 |
| UC312-38 | 60.325 | 2-3/8" | 130 | 71 | 2.57 |
| UC312-39 | 61.913 | 2-7/16" | 130 | 71 | 2.5 |
| UC313-40 | 63.5 | 2-1/2" | 140 | 75 | 3.25 |
| UC313 | 65 | 2-1/2" | 140 | 75 | 3.25 |
| UC314-44 | 69.85 | 2-3/4" | 150 | 78 | 3.95 |
| UC314 | 70 | 2-3/4" | 150 | 78 | 3.95 |
| UC315 | 75 | 3" | 160 | 82 | 4.33 |
| UC315-48 | 76.2 | 3" | 160 | 82 | 4.24 |
| UC316 | 80 | 3-1/8" | 170 | 86 | 5.57 |
| UC317-52 | 82.55 | 3-1/4" | 180 | 96 | 7.08 |
| UC317 | 85 | 3-1/4" | 180 | 96 | 6.84 |
| UC318-56 | 88.9 | 3-1/2" | 190 | 96 | 8.03 |
| UC318 | 90 | 3-1/2" | 190 | 96 | 7.87 |
| UC319 | 95 | 3-11/16" | 200 | 103 | 8.91 |
| UC319-60 | 95.25 | 3-3/4" | 200 | 103 | 8.88 |
| UC320 | 100 | 3-15/16" | 215 | 108 | 11.2 |
| UC320-64 | 101.6 | 4" | 215 | 108 | 11 |
| UC321 | 105 | 4-1/8" | 225 | 112 | 14.2 |
| UC322 | 110 | 4-5/16" | 240 | 117 | 18.8 |
| UC324 | 120 | 4-3/4" | 260 | 126 | 28.8 |
| UC326 | 130 | 5-1/8" | 280 | 135 | 40 |
| UC328 | 140 | 5-1/2" | 300 | 145 | 53 |
Showing 100 of 100 models
Original Dimension Drawing
For full dimensional details, download the original technical drawing below.
Frequently Asked Questions
What is the difference between UC200 and UC300 insert bearings?
The UC200 series covers smaller shafts from 12 mm to 75 mm bore in a light to medium duty design, while the UC300 series starts around 25 mm and reaches larger bores up to 140 mm for heavier radial loads. Both share a spherical outer ring for self-alignment and the same mounting concept, but UC300 units use a wider inner ring and larger housing. Buyers choose UC200 for standard machinery and UC300 for high-load conveyors and agricultural equipment. CTZ lists both ranges with full dimensions for correct selection.
What is the minimum order quantity (MOQ) for UC insert bearings?
CTZ accepts both small trial orders and full container quantities for UC insert bearings. Typical wholesale MOQ starts from a few hundred pieces per model for common sizes such as UC205, UC208 and UC210, while mixed-model pallets can be arranged for distributors. For OEM and private label projects the MOQ depends on packing setup and box printing. Contact the sales team with the required models and quantity to confirm the exact MOQ and unit price from the Ningbo factory.
What material are UC insert bearings made from?
UC insert bearings from CTZ use Chrome Steel (GCr15 / 100Cr6) bearing rings and balls, with a hardened inner ring and a spherical outer ring for self-alignment. Cages are typically stamped steel, and standard units include a grease fitting and factory lubrication. The surface can be plain or treated for mild corrosion resistance. Material and heat treatment follow standard bearing practice, and CTZ applies incoming material and dimensional checks to keep UC bearing quality consistent for distributors and OEM customers.
How are UC insert bearings packed for export?
UC insert bearings are supplied in neutral packing by default, with options for OEM brand packing, custom boxes, labels and export cartons. Small sizes are grouped in inner boxes, then master cartons, then pallets for sea shipment. Anti-rust protection can be added for long storage or humid routes. CTZ confirms packing details, box artwork and carton quantity before production so distributors receive UC bearing orders ready for their local market and shelf display.
What is the delivery time for UC insert bearing orders?
The usual delivery time for UC insert bearings is 20 to 30 days after receipt of the deposit, depending on order quantity, model mix and packing requirements. Common sizes are often available from stock for faster dispatch, while custom OEM packing or large UC300 volumes may need more time. CTZ coordinates mixed container loads from Ningbo and provides a clear production and shipment schedule so distributors can plan inventory for their bearing replacement and assembly business.
Need UC Series Insert Bearings?
Send us the model number, quantity, packing requirement and destination port.