Triangle Manufacturing Company Triangle Manufacturing Company

150 Libbey Avenue
Oshkosh, WI, USA 54901
P (920) 235-3710
F (920) 235-4523
sales@TriangleOshkosh.com

Motor Mounts & HVAC

Industries Using This Product

Blower Bearing Brackets

Tri-Arm Bracket     Four-arm Tri-arm from Triangle     Available in three- or four-arm styles, our bearing bracket frames are designed for the HVAC industry to facilitate accurate positioning of the shaft and blower wheel through its self-centering and self-aligning design. Arm lengths and strengths are customizable, such as 13-gauge for heavy duty loads, and provide additional rigidity to the blower side sheet where it is mounted. There are also five different bearing socket sizes offered. Tri- and quad-arm bearing brackets may be supplied preassembled by Triangle’s welding or mechanical fastening facility, or may be shipped knocked-down for customer welding.

At Triangle, we also provide a universal tri-arm for repairing and/or replacing a broken blower tri-arm. Engineered with multiple holes and extra-long arms, our universal bracket is an easy solution for standard repair needs.

Brackets are custom made to fit all blowers from 7" to 25" size. Bearings available for shaft sizes from 1/2" to 1" with finish options of plain steel or galvanized. The symmetrical design permits for the use of shaft collars on either side of bracket.

Tri-arms design architecture is strong and rigid and has a continuous vertical segment in arm and parallel bead; a mounting pad with angular cross section and double angular section of the socket. All tri-arms produce a rigid assembly which also reinforces the strength of the blower side sheet on which it is mounted. The wedge shape on both edges of cushion allows the bearing ball to absorb thrust and shock loads from either direction.

They are fully self-aligning and  when matching the spherical surfaces of the cushion and ball unit  they can effectively produce ball and socket self-aligning action.  These brackets are self-centering when installed in the blower inlet where accurate positioning  of the shaft and wheel can be facilitated.

Maximum noise and vibration suppression achieved by Triangle's Vent-Lock cushion. Its internal grooves mean softer cushioning, easier assembly of ball unit and better ventilation. The micro-conductance prevents static accumulation and the soft Neoprene 50 Durometer is unaffected by oils, grease, oxidation, or aging.

Tri-arms are economical and have a low initial cost resulting from high volume production with full automation. Combined with low handling and assembly costs - especially with the "Snap-In" feature which saves six separate operations per blower and parts shipped knock-down to save on transportation costs.

Ease of installation is aided by accurate 3-point locators where arms join each other allows for quick and easy spot or projection welding (or bolting) without use of a jig.  The ball units, complete with factory assembled  lubricant fittings, can be inserted easily into a mounted bracket, saving an extra operation to install the oil cup. 

The rounded corners and absence of burrs also minimize risk of injury to workers during handling and assembly.

Product Specifications

Size Part Number
Use with Triangle 'H' ball and #1052 cushion with a 5/8" bore TA
Use with Triangle 'H' ball and #1052 cushion with a 5/8" bore TA7259
Socket size to fit FAFNIR ball bearing RCSM series or equivalent TB
3.088 Socket Diameter TC
To fit Triangle 'D' or 'P' series with #1589 cushion FAFNIR ball bearing RCR series for 5/8" and 3/4" shaft TK
To fit Triangle 'E' or 'V' series with #1899 cushion FAFNIR ball bearing RCR series for 1" shaft TN

Socket sized to fit FAFNIR ball bearing RCSM series or equivalent for 1/2" and 5/8" shaft  
(TF is usually sold as components not a welded assembly)

TF
Socket sized to fit FAFNIR ball bearing RCSM series or equivalent for 3/4" shaft TG