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Chip-sizer Rechipper

Jeffrey Rader Chip-sizer™ Rechipper Delivers Cost-effective Reduction of Oversized Wood Chips for the Pulp and Paper Industry

The Jeffrey Rader Chip-sizer rechipper was pioneered in 1996 as a result of industry concern over the high maintenance cost of typical rechippers.  Jeffrey Rader is the first company in the industry to research and develop a true no-knife rechipper.  Several designs were discussed and tested in our lab before determining that our current patented design would be best suited for the industry. The first unit was put into production in February of 1997 and quickly achieved results beyond anyone’s expectations. In 2004, Jeffrey Rader shipped its 100th Chip-sizer rechipper.

Chip-sizer Rechipper Design

At their first look, people assume that they are looking at a typical wood hog. While the operating principal is similar to a wood hog, the Chip-sizer rechipper incorporates several special features and components.

The Jeffrey Rader designed Chip-sizer hammer allows the unit to operate at speeds much slower than hammermills, and also offers a “soft-touch” to the chips to keep from creating pins and fines. This along with other patented components permits the Chip-sizer rechipper to reduce oversized chips at unheard of efficiencies.

 CE compliant now available.

Features and Advantages of the Chip-sizer Rechipper

  • The large infeed opening ensures that plugging is eliminated in the Chip-sizer rechipper.
  • No knives to sharpen or damage keeps maintenance costs low. 
  • Low capital cost provides a rapid ROI.
  • High recovery rates increase profits.
  • Ships complete with motor, drive assembly and base for quick installation.
  • Metal trap minimizes damage from tramp metal.

Tramp Metal

The inherent configuration and heavy duty nature of hammermills means the the Chip-sizer has no knives to sharpen or be destroyed by tramp metal.

The Chip-sizer feed and discharge openings are large enough to prevent plugging.

Easy Maintenance

Routine maintenance consists of greasing the bearings and checking the tension on the drive belt per the guidelines in the maintenance manual. 

It is also recommended that you check the wear on the chipping hammers and screen bars 2-3 times annually.

See Oversized Wood Chip Test

Click the chart above to see the test results from an Oversized Wood Chip study using the Jeffrey Rader Chip-sizer


The Jeffrey Rader Chip-sizer rechipper tolerates knots, transitions, bark, bolts, pieces of machinery, rocks and dirt

High Value Results in Processing Hardwood and Softwood with the Jeffrey Rader Chip-sizer Rechipper

Results from numerous installations processing hardwood and softwood show that the percentage of oversize chips processed to acceptable chips is typically in the range of 86-95%. This value is so high that many producers are eliminating screening after the Chip-sizer rechipper and feeding directly to the "accepts" belt.

A system using the Chip-sizer rechipper therefore does not usually need a screen to recirculate overs. It also does not require an air handling system, since oversize chips are dropped vertically off a belt into the machine and discharged onto another belt. Experience has shown that surge loads of up to double the machine’s rated capacity can be accommodated without plugging.

Fast Payback

High recovery rates and reduced maintenance costs have generated significant improvements in profits for companies operating these machines. Furthermore, the lower capital costs of Jeffrey Rader Chip-sizer rechipper systems yield very attractive returns on investment.

ROI analyses have been done for many installations, and most payback times have been less than one year. It is in the order of 3-6 months for new plants or those that do not have a conventional rechipper. Even plants with rechippers have converted to Chip-sizer rechipper and have returned their investments typically within the year.

Industry Acceptance

The Jeffrey Rader Chip-sizer rechipper is the first of its kind in the chip market. Today, with more than 100 rechippers in the field, this is the sizer that has proven it gives the highest recovery rates of "cookable" chips of any rechipper. Acceptance of the Chip-sizer rechipper has been rapid and widespread, with numerous chip producers and multi-national pulp & paper companies installing machines.

For More Online Information on the Chip-sizer Rechipper

Download the Jeffrey Rader Chip-sizer Brochure

For more information, including dimensions and specifications,download our free Chip-sizer Brochure (PDF - requires registration).

Support for your Jeffrey Rader Chip-sizer

For the best performance and longest wear, order your Chip-sizer parts from Jeffrey Rader, and count on Jeffrey Rader Technical Services for field service, training and repairs.

Ask a Question

Contact us online to ask a question or request information about the Chip-sizer rechipper.

Request a Quote

Use our online form to request a quote for the Chip-sizer and other Jeffrey Rader equipment.