Komatsu track dozer with Dymax Semi-U dozer blade in an abrasive dozing application
Dymax Semi-U dozer blade for track and wheel dozers

SEMI-U DOZER BLADES FOR TRACK & WHEEL DOZERS

Dymax Semi-U dozer blades are built for track and wheel dozers working in abrasive material-handling applications. With 25-degree wing angles, they push and retain more material than straight dozer blades, making them a strong fit for mining and heavy dozing. Available for Caterpillar, Komatsu, and Liebherr machines, with optional Hardox wear packages and replaceable wear parts for longer service life.

Models include Semi-U Blades, Heavy Duty Abrasion Semi-U Blades, Variable Radius Semi-U Blades, and custom design solutions.

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STANDARD FEATURES

  • 25° wing angles help push and retain more material than a straight blade.
  • Replaceable OEM-pattern cutting edges simplify maintenance and help extend service life.
  • Designed to fit factory outside-mount push arms on supported machines.
  • Available for select Caterpillar, Komatsu, and Liebherr track and wheel dozers.

AVAILABLE OPTIONS

  • Chrome carbide wear liner package for severe-abrasion applications.
  • Hardox® 400 or Hardox® 500 wear packages for high-impact, high-wear environments.
  • White iron wear blocks and replaceable side shrouds for added protection in critical wear areas.
  • Rock guards on the top moldboard assembly for additional protection in harsh working conditions.

APPLICATIONS

  • Coal mining and stockpile work
  • Iron ore, taconite, copper, gold, and phosphate mining
  • Abrasive bulk material handling
  • Heavy dozing where greater material retention than a straight blade is needed

SPECIFICATIONS

Machine Size Model
Description
Weight
Cat D6, Komatsu D65 DX-BL-SU-7.50x11ft-TD-10
Blade-Semi U-7.50 cubic yard capacity x 11 feet wide-Track Dozer-Class 10

STANDARD FEATURES:
– Replaceable bolt on cutting edges
– 25 degree wing angles
– Attaches to factory outside mounted push arms

NOT SUPPLIED: Connector blocks, pins and retainers that attach the blade to the push arms.

WEIGHT: 3100 lbs
Cat D7, Komatsu D85 DX-BL-SU-8.85x12ft-TD-20
Blade-Semi U-8.85 cubic yard capacity x 12 feet overall width-Track Dozer-Class 20

(WILL NOT FIT LGP TRACTOR)

STANDARD FEATURES:
– Replaceable pattern bolt on cutting edges + end bits
(Due to 12ft width specification the center edges are modified)
– Vertical slat guard on top moldboard
– 25 degree wing angles
– Attaches to factory outside mounted push arms on Standard Tractors
– 60 inch height

NOT SUPPLIED: Connector blocks, pins and retainers that attach the blade to the push arms.

WEIGHT: 3995 lbs
Cat D7, Komatsu D85 DX-BL-SU-9.00x12ft4-TD-20
Blade-Semi U-9.00 cubic yard capacity x 12 feet 4 inches wide-Track Dozer-Class 20

(WILL NOT FIT LGP TRACTOR)

STANDARD FEATURES:
– Replaceable Cat pattern bolt on cutting edges + end bits
– Vertical slat guard on top moldboard
– 25 degree wing angles
– Attaches to factory outside mounted push arms on Standard Tractors
– 60 inch height

NOT SUPPLIED: Connector blocks, pins and retainers that attach the blade to the push arms.

WEIGHT: 4000 lbs
Cat D6 LGP or Wide Track Dozers DX-BL-SU-9.00x13ft9-TD-10LGP
Blade-Semi U-9.00 cubic yard capacity x 13 feet 9 inches wide-Track Dozer-Class 10 LGP Wide Track

Designed to fit a Cat D6 XE LGP track type tractor

STANDARD FEATURES:
– Replaceable Cat pattern bolt on cutting edges
– 50″ overall moldboard height
– For Tractors with 4727314 Bulldozer Arrangement
– GPS mount locations for Accugrade systems

WEIGHT: 3500 lbs
Cat D6 LGP or Wide Track Dozers DX-BL-SUVR-9.00x14ft-TD-10LGP
Blade-Semi U Variable Radius-9.00 cubic yard capacity x 14 feet wide-Track Dozer-Class 10 LGP Wide Track

STANDARD FEATURES:
– Replaceable Cat pattern bolt on cutting edges
– Cone shaped variable radius moldboard
– Vertical slat guard on top moldboard
– 25 degree wing angles
– Attaches to factory outside mounted push arms on LGP Tractors

NOT SUPPLIED: Connector blocks, pins and retainers that attach the blade to the push arms.

WEIGHT: 3400 lbs
Cat D6 LGP or Wide Track Dozers DX-BL-SUVR-10.2X14ft8-TD-20LGP
Blade-Semi U Variable Radius-10.20 cubic yard capacity x 14ft 8 inches wide-Track Dozer-Class 20 LGP Wide Track

STANDARD FEATURES:
– Replaceable Cat pattern bolt on cutting edges
– Cone shaped variable radius moldboard
– Vertical slat guard on top moldboard
– 25 degree wing angles
– Attaches to factory outside mounted push arms on LGP Tractors

NOT SUPPLIED: Connector blocks, pins and retainers that attach the blade to the push arms.

WEIGHT: 4650 lbs
Cat D8, Komatsu D155 DX-BL-SU-11.5x13ft7-TD-30
Blade-Semi U-11.50 cubic yard capacity x 13 feet 7 inches wide-Track Dozer-Class 30

STANDARD FEATURES:
– Fits Komatsu SIGMA (SINGLE STRUT) push arm group
– Blade mount locations features replaceable bushings
– High-strength AR400 moldboard group (non lined)
– Komatsu pattern bolt on cutting edges with smooth finished end bits
– Replacement 18in wing sole plates with shims

NOT SUPPLIED: Connector blocks, pins and retainers that attach the blade to the push arms.

WEIGHT: 6700 lbs
Cat D8, Komatsu D155 DX-BL-SUHD-11.5x13ft7-TD-30
Blade-Semi U Heavy Duty Abrasion-11.5 cyd capacity x 13 feet 7 inches wide-Track Dozer-Class 30

STANDARD FEATURES:
– Fits Komatsu SIGMA (SINGLE STRUT) push arm group
– Blade mount locations features replaceable bushings
– High-strength moldboard group
– Rockguard spill plate
– Base Moldboard 1/2 inch A572 with 3/8 inch AR400 wear plate liner package installed
– Komatsu pattern bolt on cutting edges with smooth finished end bits

NOT SUPPLIED: Connector blocks, pins and retainers that attach the blade to the push arms.

WEIGHT: 8500 lbs
Cat D8, Komatsu D155 DX-BL-SU-12.0x13ft1-TD-30
Blade-Semi U-12.00 cubic yard capacity x 13 feet 1 inches wide-Track Dozer-Class 30

STANDARD FEATRUES:
– Replaceable bolt on cutting edges with end bits
– 25 degree wing angles
– Attaches to factory outside mounted push arms
– 5ft-6in center moldboard height
– Vertical slat rock guard
– HD weld in side cutters

NOT SUPPLIED: Connector blocks, pins and retainers that attach the blade to the push arms.

WEIGHT: 6800 lbs
Cat D8 LGP or Wide Track Machine DX-BL-SU-13.50x15ft-TD-30LGP
Blade-Semi U-13.50 cubic yard capacity x 15 feet wide-Track Dozer-Track Dozer

STANDARD FEATURES:
– Replaceable CAT pattern bolt on cutting edges (180″)
– 25 degree wing angles
– Attaches to factory outside mounted push arms
– 5ft 6in center moldboard height
– Vertical slat rock guard
– HD weld in side cutters

NOT SUPPLIED: Connector blocks, pins and retainers that attach the blade to the push arms.

WEIGHT: 6900 lbs
Cat D9, Komatsu D275 DX-BL-SU-17.7x14ft-TD-40
Blade-Semi U-17.70 cubic yard capacity x 14 feet wide-Track Dozer-Track Dozer

STANDARD FEATURES:
– Replaceable bolt on cutting edges
– 25 degree wing angles
– Attaches to factory outside mounted push arms

NOT SUPPLIED: Connector blocks, pins and retainers that attach the blade to the push arms.

WEIGHT: 8800 lbs
Cat D9, Komatsu D275 DX-BL-SUHD-17.7x14ft2-TD-40
Blade-Semi U Heavy Duty Abrasion-17.7 cubic yard capacity x 14 feet 2 inches wide-Track Dozer-Class 40

STANDARD FEATURES:
– Replaceable CAT bolt on cutting edges
– 25 degree wing angles
– Attaches to factory outside mounted push arms
– AR400 liner package
– Vertical slat rock guard
– Solid steel side cutters

NOT SUPPLIED: Connector blocks, pins and retainers that attach the blade to the push arms.

WEIGHT: 9700 lbs
Cat D9, Komatsu D275 DX-BL-SU-17.9x14ft6-TD-40
Blade-Semi U-17.90 cubic yard capacity x 14 feet 6 inches wide-Track Dozer-Track Dozer

STANDARD FEATURES:
– 25 degree wing angles
– Komatsu bolt on cutting edges with end bits
– Fits K brace push arm assembly
– AR400 moldboard face for Phosphate mining applications
– Outside sole plate edges

NOT SUPPLIED: Connector blocks, pins and retainers that attach the blade to the push arms.

WEIGHT: 8870 lbs
Cat D10, Komatsu D375 DX-BL-SU-24.20x16ft-TD-50
Blade-Semi U-24.20 cubic yard capacity x 16 feet wide-Track Dozer-Track Dozer

STANDARD FEATURES:
– Replaceable bolt on cutting edges
– 25 degree wing angles
– Attaches to factory outside mounted push arms

NOT SUPPLIED: Connector blocks, pins and retainers that attach the blade to the push arms.

WEIGHT: 12,000 lbs
Cat D10, Komatsu D375 DX-BL-SUHD-24.20x16ft-TD-50
Blade-Semi U Heavy Duty Abrasion-24.20 cubic yard capacity x 16 feet wide-Track Dozer-Class 50

STANDARD FEATURES:
– Replaceable CAT bolt on cutting edges
– 25 degree wing angles
– Attaches to factory outside mounted push arms
– Heavy duty AR400 wear liner package
– External white iron wear blocks

NOT SUPPLIED: Connector blocks, pins and retainers that attach the blade to the push arms.

WEIGHT: 15,700 lbs
Cat D11, Komatsu D475 DX-BL-SUHD-35.5x18ft8-TD-60
Blade-Semi U Heavy Duty Abrasion-35.5 cubic yard capacity x 18ft 8 inches wide-Track Dozer-Class 60

(Similar to CAT OEM-492-8214/8216 GP SU)

STANDARD FEATURES:
– 25 degree wing angle
– AR400 multisection liner package
– Replaceable CAT bolt on cutting edges (Uses End Bits 8E4545/8E4546; 9w-4494/9w4495 for edge arrangement)
– Fits outside mount push arms on Cat D11R or T Dozers
– Includes vertical slat rock guard
– Exterior AR400 wear plates and weld on replaceable side cutters
– Base Moldboard height (less rack) 93 inches

NOT SUPPLIED: Connector blocks, pins and retainers that attach the blade to the push arms.

WEIGHT: 25,000 lbs
Design and specifications are subject to change without notice. For custom designs, contact Dymax Sales 1-785-456-2081.
Machine Size Model
Description
Weight
Cat 824 DX-BL-SU-9.0x15ft9-WD-20
Blade-Semi U-9.00 cubic yard capacity x 15 feet 9 inches wide-Wheel Dozer-Class 20

STANDARD FEATURES:
– 25 degree wing angles
– Replaceable CAT bolt on cutting edges with end bits
– Underside sole plate edge group
– Height: 64 inches

NOT SUPPLIED: Connector blocks, pins and retainers that attach the blade to the push arms.

WEIGHT: 6670
Cat 834 DX-BL-SUHD-13.2x15ft4-WD-30
Blade-Semi U Heavy Duty Abrasion-13.2 cubic yard capacity x 15 feet 4 inches wide-Wheel Dozer-Class 30

STANDARD FEATURES:
– Replaceable bolt on cutting edges and end bits
– 25 degree wing angles
– Rear sole plate replaceable cutting edges
– Center spill plate with slot design
– Fits outside mounted push arms
– 3/8″ AR400 wear liner pack age installed on moldboard face

NOT SUPPLIED: Connector blocks, pins and retainers for attaching to push arms.

WEIGHT: 9800
Cat 834 DX-BL-SU-17.6x15ft5-WD-30
Blade-Semi U-17.60 cubic yard capacity x 15 feet 5 inches wide-Wheel Dozer-Wheel Dozer

FOR CATERPILLAR 834G/H/K WHEEL TRACTOR FITTING STANDARD OUTSIDE PUSH ARMS

STANDARD FEATURES
– 185.4 inch overall width
– 0.38 A514 T1 steel moldboard group (non-lined)
– Cat style replaceable cutting edges and end bits
– Cat replaceable sole plate cutting edges installed
– Vertical slots in moldboard group
– With tubes, guards and clamps

NOT SUPPLIED: Connector blocks, pins and retainers that attach the blade to the push arms.

WEIGHT: 8800 lbs
Tiger 590 DX-BL-SU-20.9x17ft9-WD-40
Blade-Semi U-20.90 cubic yard capacity x 17 feet 9 inches wide-Wheel Dozer-Wheel Dozer

STANDARD FEATURES:
– Replaceable Cat bolt on cutting edges (Uses 2x 9W6092, 2x 7T-9125, 1x 8E4196, 1X 8E4197)
– 25 degree wing angle
– Equipped with slotted top screen assembly
– Standard Moldboard (0.50″ T1 steel)
– Underside replaceable sole plate edges (Uses 3x 135-9668)
– Fits factory outside mount push arms

NOT SUPPLIED: Connector blocks, pins and retainers that attach the blade to the push arms.

WEIGHT: 11,100 lbs
Cat 844 DX-BL-SU-24.9x19ft5-WD-50
Blade-Semi U-24.90 cubic yard capacity x 19 feet 5 inches wide-Wheel Dozer-Wheel Dozer

STANDARD FEATURES:
– Replaceable Cat bolt on cutting edges
– 25 degree wing angles
– Standard T1 moldboard group
– Underside replceable sole plate edges
– Fits factory outside mount push arms

NOT SUPPLIED: Connector blocks, pins and retainers that attach the blade to the push arms.

WEIGHT: 12,900 lbs
Cat 844 DX-BL-SU-24.9x20ft5-WD-40
Blade-Semi U-24.90 cubic yard capacity x 20 feet 5 inches wide-Wheel Dozer-Wheel Dozer

FOR CATERPILLAR 844K WHEEL TRACTOR FITTING STANDARD OUTSIDE PUSH ARMS

STANDARD FEATURES
– 245.09 in overall width x 81.60 in height
– 5/8″ T1 steel moldboard group (non-lined)
– Cat style replaceable cutting edges and end bits
– Cat replaceable sole plate cutting edges installed
– Vertical slots in moldboard group
– With tubes, guards and clamps

NOT SUPPLIED: Connector blocks, pins and retainers that attach the blade to the push arms.

WEIGHT: 13,000 lbs
Cat 854 / Tiger 790 DX-BL-SU-30.0x20ft9-WD-60
Blade-Semi U-30.00 cubic yard capacity x 20 feet 9 inches wide-Wheel Dozer-Wheel Dozer

STANDARD FEATURES:
– 25 degree wing angles
– HD moldboard group T1 face (non lined moldboard)
– Replaceable bolt on cutting edges and end bits
– Replaceable sole plate edge group
– Fits outside push arm group

NOT SUPPLIED: Connector blocks, pins and retainers that attach the blade to the push arms.

WEIGHT: 18,500 lbs
Cat 854 DX-BL-SU-33.1x20ft7-WD-60
Blade-Semi U-33.1 cubic yard capacity x 20 feet 7 inches wide-Wheel Dozer-Wheel Dozer

FOR CATERPILLAR 854G/K WHEEL TRACTOR FITTING STANDARD OUTSIDE PUSH ARMS

STANDARD FEATURES
– 248.86 in overall width x 90.52 in height
– 5/8 in T1 steel moldboard group (non-lined)
– Cat style replaceable cutting edges and end bits
– Cat replaceable sole plate cutting edges installed
– Vertical slots in moldboard group
– With tubes, guards and clamps

NOT SUPPLIED: Connector blocks, pins and retainers that attach the blade to the push arms.

WEIGHT: 21,600 lbs
Cat 854 DX-BL-SUHD-33.1x20ft7-WD-60
Blade-Semi U Heavy Duty Abrasion-33.1 cubic yard capacity x 20 feet 7 inches wide-Wheel Dozer-Class 60

FOR CATERPILLAR 854G/K WHEEL TRACTOR FITTING STANDARD OUTSIDE PUSH ARMS

STANDARD FEATURES
– 248.86 in overall width x 90.52 in height
– 3/8in AR400 4 pieces Moldboard Liner package installed
– 5/8in T1 steel moldboard group (non-lined)
– Cat style replaceable cutting edges and end bits
– Cat replaceable sole plate cutting edges installed
– Vertical slots in moldboard group
– With tubes, guards and clamps

NOT SUPPLIED: Connector blocks, pins and retainers that attach the blade to the push arms.

WEIGHT: 24,500 lbs
Letourneau D950 DX-BL-SU-35.0x20ft9-WD-60
Blade-Semi U-35.00 cubic yard capacity x 20 feet 9 inches wide-Wheel Dozer-Wheel Dozer

STANDARD FEATURES:
– 25 degree wing angles
– HD moldboard group T1 face (non lined moldboard)
– Replaceable bolt on cutting edges and end bits
– Replaceable sole plate edge group
– Fits outside push arm group

NOT SUPPLIED: Connector blocks, pins and retainers that attach the blade to the push arms.

WEIGHT: 17,000 lbs

Design and specifications are subject to change without notice. For custom designs, contact Dymax Sales 1-785-456-2081.

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