Thursday, June 9, 2011

Swing Arm Assembly



1. Cut the Upper (UL)and Lower (LL) Swing Arms (2) 1/4” x 2” x 18.5” 1095 Flat Spring Steel

2. Cut the Pipe Bearings (4) 2.75” of 3/4” 3/4” SC40 Standard Black Pipe

3. Drill a 3/16” oil hole in the center of each Bearing.

4. Weld a bearing with oil hole up at each end of the flat steel springs.

5. It i.d. of the pipe bearing is .84” and the diameter of the Grade 8 Bolt Axle is .75” so a Copper sheet bushing can be consider to snug the fit.

6. The Mounting bracket gaps are 3” so the 2.75” bearing width allows insertion of the 1/8” thick nylon washers.

Cut List:

USA. Upper Swing Arm:
UL. Upper Leaf, 1/4” x 2” x 18.5” Flat Spring Steel
ULFB. Front Bearing, 2.75” of 3/4” SC40 Standard Black Pipe, o.d. 1.050”, i.d. .8424”, wall .133”
ULBB. Back Bearing 2.75” of 3/4” 3/4” SC40 Standard Black Pipe

LSA. Lower Swing Arm:
LL. Lower Leaf, 1/4” x 2” x 18.5” Flat Spring Steel
LLFB. Front Bearing 2.75” of 3/4” 3/4” SC40 Standard Black Pipe
LLBB. Back Bearing 2.75” of 3/4” 3/4” SC40 Standard Black Pipe

SANW. Nylon Washers
Copper sheet bushing is optional.

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