huh ? Sorry, a concentric bushing won't help. You'll need to cut and rethread the riser to reduce it. Concentric means the inlet and outlet are centered, 

Customized bearing with concentric bushing and eccentric bushing. Track rollers with Gothic Arch Groove-type SG. 1.SG Series Rollers are the most widely-use 

This concentric bushing is used in the Front Carriage, and Detector Carriage assembly of bone density scan systems where it holds the roller assembly or 

In this video I need to make bushings to adapt a cup wheel to a different size arbor. Close tolerances on the need of the bushings to be concentric. I'll machine the bushings using the two methods

The concentric low profile M4XLPWB metric bushing is manufactured for size 4XL guide wheels and is made from high-quality 303-grade stainless steel. M4XLPWB bushings are used as a component for mounting guide wheels and have a precision head-thickness tolerance of +/- 0.001" to ensure optimal function and longevity. For more information or to

A concentric bushing assembly is provided. The assembly includes a bushing having a bushing cylindrical body extending to a first outer diameter and a bushing flanged end extending to a second outer diameter that is larger than the first outer diameter. The assembly also includes an insert having an insert cylindrical body extending to a third outer diameter and an insert flanged end extending

Bonding around pre-punched concentric or eccentric knockouts is not required if the enclosure containing the knockout has been tested and listed as suitable for bonding. And that rule is typically for 4S metal boxes with 1/2 and 3/4 ko's, where the ko's are hard to punch out, not the ones on a typical enclosure that can be easily pushed out

Bonding Bushings Wherever feeders enter or leave a load center through concentric knockouts, a bonding bushing should usually be installed to ensure electrical continuity of the bonding/equipment grounding system. Bonding bushings should be connected to the neutral bus bar.

Concentric MB2SS metric bushing for size 2 wheel bearings is made from high-quality stainless steel. MB2SS bushings go with size 2 v-guide wheel bearings 

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We also knew that component alignment, accuracy, holding ability and runout became critical at higher speeds. When no other company could offer a compact bushing for shafts less than an inch in diameter, CMT was up to the task. We decided to design, build and patent one. The result: The Concentric Maxi Torque keyless hub-to-shaft connection system.