Centrifugal Finishing

Often called “high-energy tumbling” or harperizers, we use these rapid finishing workhorses for polishing, deburring, and deflashing metal parts and various types of plastics.

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Quality Without Production Jams

We handle parts of many sizes, from turbine fins to medical components and automotive parts, producing high-quality centrifugal finishing results in shorter cycle times. That makes the process efficient and cost-effective for you.

Common Types of Parts Finished

Medical implants
Surgical devices
Buckles
Trigger mechanism
Automotive components
Screws, rivets, and other fasteners
Rollers and balls
O-rings
Thermoset plastics
Springs and swivel pins

Highest-Caliber Finishing

Beyond speed, harperizing handles a number of simultaneous processes, further improving production throughput of your parts.

Common Applications of Centrifugal Finishing

Components requiring high cosmetic finish
Parts requiring low-micro finish
Aggressive edge radiusing
Material removal
Cleaning, including recessed areas

Other Services

FAQs

A finishing process that deburrs and polishes parts in a much shorter period of time, compared to conventional tumbling and vibratory finishing.

Due to the size of these machines, Harperizing/Centrifugal Finishing is primarily used with parts ranging in size from .010” to 2”.

Centrifugal finishing is a great alternative to tumbling and vibratory finishing because of the G forces produced, there is also the ability to reach areas where conventional tumbling and vibratory finishing cannot reach.

Surface Roughness Conversion Chart
Ra (micrometers)	Ra (microinches)	RMS	CLA (N)	Rt	N	Cut-off Length (in)	Cut-off Length (mm)
0.025	1	1.1	1	.3	1	0.003	0.08
0.05	2	2.2	2	0.5	2	0.01	0.25
.1	4	4.4	4	0.8	3	0.01	0.25
.2	8	8.8	8	1.2	4	0.01	0.25
0.4	1.6	17.6	16	2.0	5	0.01	0.25
0.8	32	32.5	32	4.0	6	0.03	0.8
1.6	63	64.3	53	8.0	7	0.03	0.8
3.2	125	137.5	125	13	8	0.1	2.5
6.3	250	275	250	25	9	0.1	2.5
12.5	500	550	500	50	10	0.1	2.5
25.0	1000	1100	1000	100	11	0.3	8.0
50.0	2000	2200	2000	200	12	0.3	8.0
Ra = Roughness Average in micrometers or microinches. RMS = Root Mean Square in microinches. CLA = Center Line Average in microinches. Rt = Roughness Total in microns N = New ISO (grade) scale numbers. Cut-off Length = Length required for sample.