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line feeding type formula rely on hitting the ground(BumpFeedType)
As cutting devices for the Brushcutters, there are 2 different types in the industry, such as nylon line heads and metal blades (Chip-saws, 30 teeth blades etc.)
Cutting performance of Nylon line heads are not good as chip-saws and/or other metal blades but it does not have a risk of accidental cut on the feet or body of the operators like a case of metal blades usage.
As additional advantage of the Nylon line heads, once weeds or grass are cut by Nylon line heads, it will take a time to grow again due to ripped shape of the cutting edge of the weeds or grass.
Diatop's Nylon line heads which can be used in many different conditions and usages shall be categorized in 4 different types as shown below.

Ultra auto feed type ・・・ It features both Automatic feed and Bump feed.

Full auto feed type ・・・ It has Automatic feed function.

Bump feed type ・・・ The lines shall be fed once the bottom of the head is tapped on the ground when it is spinning.

Manual feed type ・・・ The lines shall be adjusted or replaced manually.
Bump feed
  • This head also equips the bump feed function that enables to feed the cord once the bottom of the head is bumped on the ground when it is spinning.
  • Anybody can rewind the cord easily
  • It can be used for most of the brushcutters by changing arbor bolt or nut for installation
BumpFeed W4 Mount a round hole (the same metal blade), light weight and low vibration design of security!
New! Can be easily resolved without involving the line!
BumpFeed W4 Mount a round hole (the same metal blade)
Rounded hole type
(Same method of installation as Metal blade)
Diameter Weight Capable Wind length of line Suitable engine Adoptable Bolts & Nuts Activate conditions for Automatic feeding system
4inch
275g MAX:φ2.4×4.0m

How to wind cutting line.(Movie)
26cc~35cc Please install it with genuine bolt or nut of your own Brushcutter.

The movie of installation.
Detailed information
(wind4.pdf:2.8MB)

Once engine RPM reaches at 8500 rpm, the line will be fed automatically.

The movie of the use spot
Bump Feed W4 Universal Type.pdf
See exploded view (PDF)
BumpFeed W4 screw-mount type
Screw-mount type
Diameter Weight Capable Wind length of line Suitable engine Adoptable Bolts & Nuts Activate conditions for Automatic feeding system
4inch
302g MAX:φ2.4×4.0m

How to wind cutting line.(Movie)
26cc~35cc For Male screws
M10x1.25L
M8x1.25L

For Female screws
M10x1.25L
M8x1.25L

The movie of installation.
Detailed information
(wind4.pdf:2.8MB)

Once engine RPM reaches at 8500 rpm, the line will be fed automatically.

The movie of the use spot
Bump Feed W4 Screw Type.pdf
See exploded view (PDF)
BumpFeed NB5 Mount a round hole (the same metal blade)
Rounded hole type
(Same method of installation as Metal blade)
Diameter Weight Capable Wind length of line Suitable engine Adoptable Bolts & Nuts Activate conditions for Automatic feeding system
5inch
355g MAX:φ2.4×7.0m

How to wind cutting line.(Movie)
26cc~35cc Please install it with genuine bolt or nut of your own Brushcutter.

The movie of installation.
Once engine RPM reaches at 8500 rpm, the line will be fed automatically.
Bump Feed NB5_universal.pdf
See exploded view (PDF)
BumpFeed NB5 Screw-mount type
Screw-mount type
Diameter Weight Capable Wind length of line Suitable engine Adoptable Bolts & Nuts Activate conditions for Automatic feeding system
5inch
355g MAX:φ2.4×7.0m

How to wind cutting line.(Movie)
26cc~35cc For Male screws
M10x1.25L M8x1.25L 

For Female screws
M10x1.25L M8x1.25L
M12x1.75L

The movie of installation.
Once engine RPM reaches at 8500 rpm, the line will be fed automatically.
Bump Feed NB5_screw.pdf
See exploded view (PDF)
BumpFeed NB4 Round-hole-mount (same as the metal blade.)
Rounded hole type
(Same method of installation as Metal blade)
Diameter Weight Capable Wind length of line Suitable engine Adoptable Bolts & Nuts Activate conditions for Automatic feeding system
4inch
245g MAX:φ2.4×4.0m

How to wind cutting line.(Movie)
20cc~30cc It can be used for most of the brushcutters by changing arbor bolt or nut for installation Once engine RPM reaches at 8500 rpm, the line will be fed automatically.
Bump Feed NB4_screw.pdf
See exploded view (PDF)
BumpFeed NB4 Screw-mount type
Screw-mount type
Diameter Weight Capable Wind length of line Suitable engine Adoptable Bolts & Nuts Activate conditions for Automatic feeding system
4inch
245g MAX:φ2.4×4.0m

How to wind cutting line.(Movie)
20cc~30cc For Male screws
M10x1.25L M8x1.25L M7x1.00L

For Female screws
M10x1.25L M8x1.25L
M8x1.25R UNF3/8x24
Once engine RPM reaches at 8500 rpm, the line will be fed automatically.
Bump Feed NB4_screw.pdf
See exploded view (PDF)
Download Adobe Reader to see exploded view (PDF)
BumpFeed B6 Screw-mount type
Screw-mount type
Diameter Weight Capable Wind length of line Suitable engine Adoptable Bolts & Nuts Activate conditions for Automatic feeding system
6inch
576g MAX:φ3.0×8.0m 25cc~50cc For Male screws
M10x1.25L

For Female screws
M10x1.25L 1.00L
M12x1.75L M8x1.25L
Once engine RPM reaches at 8500 rpm, the line will be fed automatically.
Bump Feed B6_screw.pdf
See exploded view (PDF)
BumpFeed B5 Screw-mount type
Diameter Weight Capable Wind length of line Suitable engine Adoptable Bolts & Nuts Activate conditions for Automatic feeding system
5inch
338g MAX:φ2.4×6.5m

How to wind cutting line.(Movie)
26cc~35cc The movie of installation.For Male screws
M10x1.25L M8x1.25L

For Female screws
M10x1.25L M8x1.25L

The movie of installation.
Once engine RPM reaches at 8500 rpm, the line will be fed automatically.
Bump Feed B5_screw.pdf
See exploded view (PDF)
BumpFeed B5 Round-hole-mount (same as the metal blade.)
Diameter Weight Capable Wind length of line Suitable engine Adoptable Bolts & Nuts Activate conditions for Automatic feeding system
5inch
338g MAX:φ2.4×6.5m

How to wind cutting line.(Movie)
26cc~35cc Please install it with genuine bolt or nut of your own Brushcutter.

The movie of installation.
Once engine RPM reaches at 8500 rpm, the line will be fed automatically.
Bump Feed B5_universal
See exploded view (PDF)
BumpFeed B4 Screw-mount type
Screw-mount type
Diameter Weight Capable Wind length of line Suitable engine Adoptable Bolts & Nuts Activate conditions for Automatic feeding system
4inch
205g MAX:φ2.4×6.0m 20cc~30cc For Male screws
M10x1.25L M8x1.25L

For Female screws
M10x1.25L M8x1.25L
M8x1.25R UNF3/8x24
Once engine RPM reaches at 8500 rpm, the line will be fed automatically.
Bump Feed B4_screw.pdf
See exploded view (PDF)
Download Adobe Reader to see exploded view (PDF)
BumpFeed F4 Round-hole-mount (same as the metal blade.)
Rounded hole type
(Same method of installation as Metal blade)
Diameter Weight Capable Wind length of line Suitable engine Adoptable Bolts & Nuts Activate conditions for Automatic feeding system
4inch
215g MAX:φ2.4×3.0m

How to wind cutting line.(Movie)
20cc~30cc Please install it with genuine bolt or nut of your own Brushcutter.

The movie of installation.
Once engine RPM reaches at 8500 rpm, the line will be fed automatically.
Bump Feed F4_universal.pdf
See exploded view (PDF)
BumpFeed F4 Screw-mount type
Screw-mount type
Diameter Weight Capable Wind length of line Suitable engine Adoptable Bolts & Nuts Activate conditions for Automatic feeding system
4inch
215g MAX:φ2.4×3.0m

How to wind cutting line.(Movie)
20cc~30cc For Male screws
M10x1.25L M8x1.25L M7x1.00L

For Female screws
M10x1.25L M8x1.25L
M8x1.25R UNF3/8x24

The movie of installation.
Once engine RPM reaches at 8500 rpm, the line will be fed automatically.
Bump Feed F4_screw.pdf
See exploded view (PDF)
BumpFeed Z5 Screw-mount type
Diameter Weight Capable Wind length of line Suitable engine Adoptable Bolts & Nuts Activate conditions for Automatic feeding system
5inch
385g MAX:φ2.4×7.0m 26cc~35cc For Male screws
M10x1.25L M8x1.25L 

For Female screws
M10x1.25L M8x1.25L
M12x1.75L
Once engine RPM reaches at 8500 rpm, the line will be fed automatically.
Bump Feed Z5_screw.pdf
See exploded view (PDF)
BumpFeed Z4 Screw-mount type
Diameter Weight Capable Wind length of line Suitable engine Adoptable Bolts & Nuts Activate conditions for Automatic feeding system
4inch
250g MAX:φ2.4×6.0m 20cc~30cc For Male screws
M10x1.25L M8x1.25L 

For Female screws
M10x1.25L M8x1.25L
Once engine RPM reaches at 8500 rpm, the line will be fed automatically.
Bump Feed Z4_screw.pdf
See exploded view (PDF)
Download Adobe Reader to see exploded view (PDF)
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