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Upper Rudder Bearings
Imperial Size Upper Rudder Bearing Low Profile
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URB-LP-3500-00
| Manufacturer | Tides Marine |
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| Product Code | UPPER RUDDER BEARING |
| Product Line | URBP |
Price $1,203.86
Description
URB-LP-3500-00 – Upper Rudder Bearing Low Profile for a 3 1/2 Inch Rudder Stock.
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URB-LP
URB-LP |
The Tides Marine Upper Rudder Bearing-Low Profile (URB-LP) is designed to be installed on vessels where the steering system components need to be located as close to the rudder shelf as possible. Mounted through the rudder shelf, this design maintains a clean, low-profile appearance. Like the URB-STD, the URB-LP is an ABS- and Lloyds-approved, self-aligning design which accommodates up to 10 degrees of off-axis alignment between the mounting surface (rudder shelf) and the rudder stock. As a result, it requires no shimming during installation and will not load up the rudder shaft during vessel operation. The URB-LP is lighter than conventional bronze units. It consists of a UHMW ball-type bearing captured within a UHMW housing. The ball-type bearing is designed with a flat surface at the top to accept a rudder collar, allowing the unit to effectively carry rudder download during vessel operation. The Tides design eliminates metal-to-metal contact and the associated problems of abrasion and electrolytic corrosion. The URB-LP is self-lubricating and maintenance free. Steering is smoother and quieter. Minor mounting adjustments to the rudder systems steering components may be necessary if the height of the unit is different than the metal pillowblock style bearing it is replacing.
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Before placing your order, there are several measurements you need to take/confirm. Measure the exact diameter of your rudder stock (.000″). Locate this measurement in the table below. Next, note the flange height of your part (Measurement E) in the table. Verify there is enough room between the rudder shelf and the deck / miscellaneous construction above to install the unit (generally, 1 1/2 times the overall height of the unit (Measurement B). Then, using the barrel diameter measurement in Column C, confirm there is sufficient clear space on the shelf around the rudder stock to locate the URB-LP. Finally, check the position and mounted height of other steering components to determine if any adjustment will be necessary once the URB-LP is in place. |
Upper Rudder Bearing – Low Profile Imperial Sizes Specifications (dimensions in inches)
| Rudder |
Assembly |
Barrel |
Flange |
Flange |
Bolt |
# of Bolts |
Part |
Buy |
|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 4 1/2 | 6 1/2 | 3/4 | 5 1/2 | 6 | URB-LP-1000-00 | Buy Now |
| 1 1/8 | 2 | 4 1/2 | 6 1/2 | 3/4 | 5 1/2 | 6 | URB-LP-1125-00 | Buy Now |
| 1 1/4 | 2 | 4 1/2 | 6 1/2 | 3/4 | 5 1/2 | 6 | URB-LP-1250-00 | Buy Now |
| 1 3/8 | 2 | 4 1/2 | 6 1/2 | 3/4 | 5 1/2 | 6 | URB-LP-1375-00 | Buy Now |
| 1 1/2 | 2 | 4 1/2 | 6 1/2 | 3/4 | 5 1/2 | 6 | URB-LP-1500-00 | Buy Now |
| 1 3/4 | 2 | 4 1/2 | 6 1/2 | 3/4 | 5 1/2 | 6 | URB-LP-1750-00 | Buy Now |
| 2 | 3 | 5 1/2 | 7 1/2 | 1 | 6 1/2 | 6 | URB-LP-2000-00 | Buy Now |
| 2 1/4 | 3 | 5 1/2 | 7 1/2 | 1 | 6 1/2 | 6 | URB-LP-2250-00 | Buy Now |
| 2 3/8 | 3 | 5 1/2 | 7 1/2 | 1 | 6 1/2 | 6 | URB-LP-2375-00 | Buy Now |
| 2 1/2 | 3.275 | 6 1/2 | 9 | 1 1/8 | 7 3/4 | 8 | URB-LP-2500-00 | Buy Now |
| 2 3/4 | 3.275 | 6 1/2 | 9 | 1 1/8 | 7 3/4 | 8 | URB-LP-2750-00 | Buy Now |
| 3 | 3.275 | 6 1/2 | 9 | 1 1/8 | 7 3/4 | 8 | URB-LP-3000-00 | Buy Now |
| 3 1/2 | 4 | 8 | 11 | 1 1/2 | 9 1/2 | 8 | URB-LP-3500-00 | Buy Now |
| 4 | 4 1/8 | 8 1/2 | 11 1/2 | 1 1/2 | 9 1/2 | 8 | URB-LP-4000-00 | Buy Now |
| 4 1/2 | 4 1/8 | 8 1/2 | 12 | 1 1/2 | 10 1/4 | 8 | URB-LP-4500-00 | Buy Now |
| 5 | 4 1/4 | 9 | 12 1/2 | 1 1/2 | 10 3/4 | 10 | URB-LP-5000-00 | Buy Now |
Tide Marine offers many custom sizes and dimensions. Please call for any size or dimension you do not see here.
Upper Rudder Bearing – Low Profile Metric Sizes Specifications (dimensions in inches except rudder stock OD)
| Rudder |
Assembly |
Barrel |
Flange |
Flange |
Bolt |
# of Bolts |
Part |
Buy |
|---|---|---|---|---|---|---|---|---|
| 30MM | 2 | 4 1/2 | 6 1/2 | 3/4 | 5 1/2 | 6 | URB-LP-30MM-00 | Buy Now |
| 40MM | 2 | 4 1/2 | 6 1/2 | 3/4 | 5 1/2 | 6 | URB-LP-40MM-00 | Buy Now |
| 45MM | 2 | 4 1/2 | 6 1/2 | 3/4 | 5 1/2 | 6 | URB-LP-45MM-00 | Buy Now |
| 60MM | 3 | 5 1/2 | 7 1/2 | 1 | 6 1/2 | 6 | URB-LP-60MM-00 | Buy Now |
| 70MM | 3.275 | 6 1/2 | 10 1/2 | 2.215 | 9 1/4 | 8 | URB-LP-70MM-01 | Buy Now |
| 90MM | 4 | 8 | 11 | 1 1/2 | 9 1/2 | 8 | URB-LP-90MM-00 | Buy Now |
URB Low Profile Installation Guide
The following is a brief description of the installation procedure for the URB-LP. Complete installation instructions are included with each unit and should be followed closely.
- Block up the rudder securely.
- Remove steering arm/quadrant from the rudder stock.
- Disconnect rudder collar and remove.
- Remove existing rudder bearing bolts and remove rudder bearing.
- Fill the existing bolt holes left in the shelf from the old bearing with fiberglass and resin.
- Slide the URB unit onto the rudder stock and into position on the rudder shelf.
- Using the URB-LP unit as a template, trace the diameter of the base onto the rudder shelf so that a clearance hole may be cut.
- Remove the unit and, using a jigsaw, cut a clean hole through the rudder shelf.
- Align/rotate the unit so that new bolt holes can be drilled through the shelf. (Backing plates are available for extra strength).
- Drill new holes through the shelf using the holes in the flange as a template.
- Align the unit with the pre-drilled holes in the shelf. Insert the required number of stainless steel hex bolts (with washers and lock washers) through the assembly and secure to the rudder shelf. Large fender washers or backing plates should be used against the bottom of the rudder shelf.
- Reposition the rudder collar so that it contacts the bearing in the URB unit and secure. Use washers as necessary to align the rudder collar with the original set screw “dimples”.
- Remove the blocking from the rudder and verify that the rudder swings freely.
- Reassemble the other steering system components (arm, quadrant, etc.).
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NOTE: To be properly installed, the “barrel” portion of the URB-LP must be at least 50% supported. See diagram below for details.
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URB-LP Installation Guide may be downloaded HERE