Raytech Onyx Mag 4 - 115V

Total ---

Put the power of magnetic finishers to work for you! Magnetic finishing remains today’s state-of-the-art method to finish precious, non-ferrous metals with a high degree of intricacy with medias (stainless steel pins) as small as 0.30mm in diameter and 0.25mm in length.

Magnets embedded in a cast disc constantly change polarity, creating a centrifugal action in the media allowing your finisher to access recesses, channels, undercuts, and other confined areas where other conventional methods/medias simply cannot. Soft, non-ferrous metals can be burnished in as little as half an hour, ensuring quicker turnaround time and improved productivity. If your pieces have large, smooth or flat surfaces, the finish will appear frosted or have an interesting, satin-finish look. A slight buffing or a run in a dry finisher (such as our 852-0746) will easily bring the finish to a high shine.

The Onyx 4 utilizes a direct-drive, fan-cooled motor providing a variable speed, forward/reverse function to change the direction of media flow and thus not allowing the stainless steel pins to clump in one area of the bowl.

The Onyx Mag 4 comes complete with a heavy-duty plastic bowl/cover. It can accommodate an 8-12 ring capacity and comes supplied with ample amount (250 grams) of 0.5mm stainless steel pins, as well as a supply of burnishing compound to keep your pins and parts running as clean as possible.

One-Year Warranty. Made in China.


  • Direct-drive, fan-cooled machine for ultra-quiet operation.
  • Auto shutoff function.
  • Clear bowl with fill-line indicators offer easy load preparation of pins and compound (See Related Products for Replacement Bowl).
  • Space-saving finisher is fully programmable. Additional features include an electronic timer with a digital readout
  • Compact heavy-duty construction for long life usage.

All Raytech Magnetic Finishers are built and engineered to the highest quality standards. See chart below for an easy comparison of all the other available models.

Gesswein Item # 852-0270 852-0540 852-0301 852-0342 852-0347
Model CMF-300 Onyx Mag 4 CMF-610 CMF-900 CMF-1200
Bowl Diameter: 3" (76mm) 4" (100mm) 6" (150mm) 9" (230mm) 12" (300mm)
Bowl #:
852-0273 852-0545 852-0318 852-0344 852-0346
Pin Capacity: 50g (included) 100g (250g included) 250g (included) 400 - 800g 800 - 1200g
Ring Capacity: 6 12 30 100 225
Forward/Reverse Function: No Yes Yes Yes Yes
Motor: 1/32 HP 1/32 HP 1/12 HP 1/3 HP 1/3 HP
Electrical: 115V, 60Hz 115V, 60Hz 115V, 60Hz 115V, 60Hz 115V, 60Hz
Variable Speed: No Yes Yes Yes Yes
Timer: Analog Digital Digital Digital Digital
Ship Weight: 10 lbs. (4.5kg) 13 lbs. (6kg) 24 lbs. (11kg) 50 lbs. (25kg) 80 lbs. (38kg)
Product Dimensions: 
(L x W x H)
5.5" x 5.5" x 9"
(140 x 140 x 229mm)
6.5" x 6" x 10"
(165 x 152 x 254mm)
10" x 10" x 14"
(254 x 254 x 356mm)
13" x 13" x 18"
(330 x 330 x 457mm)
16" x 16" x 20"
(407 x 407 x 508mm)
Shipping Dimensions:
(L x W x H)
7" x 8" x 10"
(178 x 203 x 254mm)
7" x 8" x 11
(178 x 203 x 280mm)
15" x 18" x 15"
(381 x 457 x 381mm)
18" x 27" x 18"
(457 x 686 x 457mm)
23" x 30" x 23"
(584 x 762 x 584mm)

Tech Tip:
Important! Under no circumstances should the pins be stored in the bowl on the machine. Doing so will cause the pins to magnetize, resulting in over-magnetizing of pins, thus lessening their effectiveness.

230V, 50Hz models are available for ordering.

  • NEW