Bronze Flanged Bushing Oil Grooves Precision Bore CNC Lathe Machined 0.01mm Fit

This flanged bronze bushing is turned from centrifugal-cast tin bronze or aluminium bronze bar, with a precision reamed bore, two circumferential oil grooves and four axial oil slots, plus an integral flange carrying the thrust face. The bore is the whole function of the part: a bushing that is out of round by two hundredths will run hot no matter how good the shaft is, and an oil groove that is too shallow loses its oil film within a few thousand cycles. It is used as a plain bearing in pumps, gearboxes, conveyor rollers, agricultural implements and machine slides.

Bronze cuts freely but smears if the tool is dull, and grooves cut after the bore is finished can raise a burr into the running surface. The order below avoids both.

Groove depth is checked optically as well as with a depth gauge, because a bronze groove with a raised edge still measures to depth while the shaft rides on the burr. Bore roundness is measured in three sections along the length, not only at the mouth.

Bushings are matched to the shaft and housing, so bore, flange and lubrication pattern are all made to your drawing.

• Bore from 4mm to 150mm, outside diameter to 200mm, length to 300mm.
• Flange: plain thrust face, stepped locating flange, double flange, or flange with bolt holes.
• Lubrication: circumferential grooves, axial slots, spiral groove, cross-pattern groove, oil holes through the wall, grease nipple port.
• Materials: tin bronze CuSn8, aluminium bronze CuAl10Fe3, lead-free bronze, brass, or bimetal steel-backed bronze.
• Fits: H7 running fit, press fit with interference, or clearance matched to your shaft tolerance.
• Finishing: oil impregnation, graphite plugging, deburred bore edges, chamfered lead-in.
• Prototype from 1 piece, with the same program and form tool kept for repeat orders.

Send the shaft diameter with its tolerance, load and speed, and our engineering team recommends the bore fit and groove pattern with a quote, usually within one to two working days.

Dongguan Changxinda Precision Technology Co., Ltd has produced custom CNC parts since 2008 in Dongguan, Guangdong, China. The facility operates CNC lathes, turn-mill combined lathes and 4-axis and 5-axis machining centers with about 100 employees, including dedicated CAM programming and quality teams. More than 200 customers are served in medical equipment, robotics, automotive, aerospace, automation, laser, LED, lithium battery and precision testing instruments, with 50-60 percent of output exported. The company is ISO 9001:2015 certified, holds annual sales in the USD 10-20 million range, and inspects in house on CMM, bore gauges and roughness testers. Bushings, sleeves and bearing housings are everyday work, using the same capability applied to fluid handling and automation components.

• Monthly capacity above 10,000 pieces for bushings and sleeves, with reserved capacity for repeat programmes.
• Typical lead time: 3-7 days for prototypes, 7-14 days for 10-100 pieces, 14-30 days for mass production.
• Form tools, programs and the approved first article are archived against your part number, so groove geometry repeats without re-grinding tools.
• Bore and groove reports ship with every lot, keeping your incoming inspection short.
• Rush service and scheduled release shipping available for projects with a fixed line-side date.
• Export packaging: bore protected, oiled bag where specified, desiccant, master carton, palletized for LCL or FCL.

Pump and motor bearings, gearbox bushings, conveyor roller ends, agricultural implement pivots, machine slide bearings, hydraulic cylinder rod guides, marine shaft bearings, and custom non-standard flanged bushings built to customer drawings.