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Idler Pulley Bore and Bushing Adapters

Made from sintered powder metal, lightly oil impregnated, zinc coated or blackened to
resist rusting. For washdown applications request coating with stainless steel paint.

Bushing Bore Adapters
Part No. Bolt dia. Stand-off
BA35* 5/16"   (9 mm) 0
BA38 3/8"   (9.5 mm) 0
BA41 0.413"   (10.5 mm) 0
BA47 0.472"   (12 mm) 0
BA50 1/2"   (12.7mm) 0
Bushing Bore Adapter

Bushing Bore Adapter

Shoulder Adapters
Part No. Bolt dia. Stand-off
SA2417 0.236"   (6 mm) 0.17"   (4.5 mm)
SA2530 1/4"   (6.4 mm) 0.30"   (7.6 mm)
SA3117 5/16"   (8 mm) 0.17"   (4.3 mm)
SA3139 5/16"   (8 mm) 0.39"   (9.9 mm)
SA3179 5/16"   (8 mm) 0.79"   (20.1 mm)
SA3820 3/8"   (9.5 mm) 0.20"   (5.1 mm)
SA3827 3/8"   (9.5 mm) 0.27"   (6.9 mm)
SA3831 3/8"   (9.5 mm) 0.31"   (8 mm)
SA3841 3/8"   (9.5 mm) 0.41"   (10.4 mm)
SA3846 3/8"   (9.5 mm) 0.46"   (11.7 mm)
SA3851 3/8"   (9.5 mm) 0.51"   (13 mm)
SA3859 3/8"   (9.5 mm) 0.59"   (15 mm)
SA3876 3/8"   (9.5 mm) 0.76"   (19.3 mm)
SA4130 0.413"   (10.5 mm) 0.30"   (7.6 mm)
SA4151 0.413"   (10.5 mm) 0.51"   (7.6 mm)
SA4951 0.492"   (12.5 mm) 0.51"   (13 mm)
SA5027 1/2"   (12.7 mm) 0.27"   (6.9 mm)
SA5051 1/2"   (12.7 mm) 0.51"   (13 mm)
SA5076 1/2"   (12.7 mm) 0.76"   (19.3 mm)
Shoulder Adapter

Shoulder Adapter

Clevis Adapters
Part No. Bolt dia. Stand-off
CA381 7 3/8"   (9.5 mm) 0.17"   (4.3 mm)
CA3827 3/8"   (9.5 mm) 0.27"   (6.9 mm)
CA3851 3/8"   (9.5 mm) 0.51"   (13 mm)
CA3876 3/8"   (9.5 mm) 0.76"   (19.3 mm)
CA5027 1/2"   (12.7 mm) 0.27"   (6.9 mm)
CA5051 1/2"   (12.7 mm) 0.51"   (13 mm)
CA5076 1/2"   (12.7 mm) 0.76"   (19.3 mm)
Clevis Adapter

Clevis Adapter


To convert idler pulleys to drive pulleys see Drive Pulley Adapters.

Stand-off from outer edge of idler = Stand-off - (Width of idler - 0.472")/2

Example: Stand-off from outer edge of Idler 3/8" x 3"
with shoulder adapter SA3827 = 0.27" - (0.65" - 0.472")/2 = 0.18"

Stand-off from center of idler = Stand-off + 0.236"

Example: Stand-off from center of Idler 3/8" x 3"
with shoulder adapter SA3827 = 0.27" + .236" = 0.506"

6203 bearing dimensions:
40 mm (1.575") OD, 12 mm (0.472") thick, 17 mm (0.669") bore.

*For use only with Idler 5/16" x 2.13", which has a 6202 bearing with a 15 mm bore.

For the best in bore and bushing adapters, insist on DuraBelt.

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