Worm Sifting Screen

The Worm Sifting Screen on the Brockwood Worm Shi*fter was designed with these attributes in  mind:

worm siftintg screen frame

Bare Bones Wood Screen Frame

  1. Grid Size and Selection
  2. Strength and Durability
  3. Fast Efficient  Sifting
  4. Weight and Balance
  5. Availability of Material
  6. Quality of Material


egg chute
Flexible Naugahyde Cocoon Chute

We selected the 1/8″ and 3/32″ hole grid for casting separation and a 1/4″ and 1/8″ hole grid for cocoon separation. We make two specialized screens, for night crawlers 1/8″ & 1/4″ perforated aluminum panels and for red worms 3/32 and 1/8″ perforated aluminum panels. Night crawler eggs are larger than red worm eggs so two different screens are necessary.


three chutes for worm siftint

All three chutes installed

Perforated aluminum panels are not prone to clogging like the wire screens because they are flat and smooth, easy to keep clean. The Aluminum panels are also not prone to rusting and developing jagged broken wires that will cause worms to hang up and get injured or cut your fingers when you clean them. Aluminum screen panels are lighter and stronger than hardware cloth.



cocoon screen

1/4′ grid cocoon screen

The combination of the angular pitch  and velocity of the worm sifting screen assembly causes the worms, castings and cocoons to move from input to output efficiently in about 20 seconds. There are three chutes to direct the three products of harvest into their respective bins and or buckets. It is typical to sift two 3.5 gallon buckets per minute or 120 buckets per hour.



casting screen

Adding the 1/8″ casting screen panel

The weight and balance of the worm sifting screen are very important to the longevity of the wear parts and the noise level of the operation. This is why the screen frame is built with wood instead of steel and the output chutes are made with Naugahyde instead of sheet metal. Metal chutes are noisy and prone to stress fractures. They are also more time consuming and costly to replace if needed.


Deluxe worm sifting machine

Complete machine with optional tamping platform

The availability of this combination of wood, perforated Aluminum and Naugahyde is good. Perforated Aluminum is  not as cheap as wire mesh but much more desirable in all aspects. Each worm sifting screen is carefully built from the highest quality parts we can find. After being assembled they are tested “dry” for a sufficiently long enough time to assure it meets our high standards. They are then disassembled and packed for shipping. We know when we ship that all the parts fit together and work properly.

Worm Harvester from Brockwood Farm

Me and my Worm Shi*fter all ready to pack and ship





2 thoughts on “Worm Sifting Screen

  1. Ron Wilson

    Hi – My wife & I have been raising nightcrawlers for about a year. We built a harvester that helped the manual sifting we started with. (nowhere near as nice as yours)
    We are growing our inventory and are looking into something better to help with harvesting our castings.
    I have a few questions if you’ve got time:
    1. Roughly how long (hours or run time) before any maintenance needs to be done with the motor or operating parts?
    2. How is it delivered? (We live in a residential area in the country & may not be home when it arrives)
    3. Is shipping included in the cost? (we live in northern wisconsin – Tomahawk)
    4. Do you have (or know of) any used or reconditioned ones on hand?

    Thanks for your time!

  2. Harry Hopkins Post author

    Thank you for your Interest Ron. The motor requires no maintenance. It is a 1/3 hp, TEFC (totally enclosed fan cooled) industrial grade Leeson 115 VAC motor. It comes with a 1 year manufacturers warranty from Leeson. I have been using these motors for many years and have never had one fail from normal usage. In 17 years of building the Stall Shi*fter and 2 years of building the Worm Shi*fter, that is over 700 machines shipped, I have never had a call for a replacement belt. I have customers in the equine business who run their machines 3 hours a day everyday.

    There are two parts that require oiling after each day’s use. These are the two tie rod ends and all it takes is a spritz of WD40. Normal care and cleaning when dirt begins to accumulate and screen holes start to get blocked along with the oil on the tie rod ends will give you years of trouble free service. The crank shaft is the only proprietary part on the machine and is easily replaced if needed. The bearings are all sealed so we don’t expect a failure.

    The machine ships via UPS in 3 boxes and is easily assembled in about 45 minutes. UPS will leave the boxes on your porch but you will get an email from them giving you a delivery date so you can be watching for it.

    Shipping is an additional charge and shipping from here to Northern Wisconsin will be about $200.

    I have no knowledge of any used machines for sale and I have never had to recondition one. Once someone gets one they don’t want to sell it.

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