Screw-On Tool Heads & Modular Extensions

Modular Screw-On Head ExtensionsDapra's Carbide Core Modular Extensions Are Ideal for Standard Inch End Mill Holders

Carbide Core Modular Extensions

Carbide Core Modular Extensions
For Head Dia. Extension Part No. Shank Dia. Effective Length OAL Thread CC A
.750"/20mm CC-ME-0750-3500C 1.000" 3.7" 6.0" M10 7/16" x 4.0" .660
1.000"/25mm CC-ME-1000-4500C 1.000" 4.7" 7.0" M12 7/16" x 5.0" .935
1.250"/1.500"/1.500" CC-ME-1250-5500C 1.250" 5.7" 8.0" M16 1/2" x 6.0" 1.175
2" Add-On Extensions
For Head Dia. Extension Part No. Effective Length Thread
.750"/20mm ME-0750-2"C EXTENSION ADAPTER 2.0" M10
1.000"/25mm ME-1000-2"C EXTENSION ADAPTER 2.0" M12
1.250"/1.500" ME-1250-2"C EXTENSION ADAPTER 2.0" M16
Carbide Core Modular Extensions


Screw-on modular tool headsDapra Modular Heads Screw on to Industry Standard Systems!

Dapra produces a full selection of Ball Nose, Square Shoulder and Toroid screw-on heads. Advantages include:

Square Shoulder Modular Heads

Square Shoulder Screw-On Modular Tool Head
Square Shoulder Screw-On Heads
Dia. Holder M DOC E Flutes Inserts Open-End Wrench
.750" SSEM0750-MOD-R35-2 M10 .350" 1.50" 2 APET1003.. / XPET1003.. 9/16"
1.000" SSEM1000-MOD-R55-2 M12 .550" 1.50" 2 APET1604.. / XPET1604.. 11/16"
1.250" SSEM1250-MOD-R55-3 M16 .550" 1.75" 3 APET1604.. / XPET1604.. 15/16"
1.500" SSEM1500-MOD-R55-3 M16 .550" 1.75" 3 APET1604.. / XPET1604.. 15/16"

Ball Nose Modular Heads

Ball Nose Modular Tool Heads
Ball Nose Screw-On Heads
Dia. Holder M E Flutes Wrench
.500"/12mm GWR12-MOD M8* 1.05" 2 3/8"
.625"/16mm GWR16-MOD M8* 1.11" 2 7/16"
.750"/20mm GWR20-MOD M10 1.28" 2 9/16"
1.000"/25mm GWR25-MOD M12 1.65" 2 11/16"
1.250"/32mm GWR32-MOD M16 1.78" 2 15/16"

* M8 modular extensions not available. Use ISO standard bars.


Toroid Modular Heads

Metric Screw-On Tool Head
Toroid Screw-On Heads
"R" Value Dia. Holder M E IC Flutes Wrench Insert
R3 .750" TREM075-MOD-R3-2† M10 1.50" .375" 2 9/16" RDCH-32/HFDCH-32
R4‡ 1.000" TREM100-MOD-R4-2‡ M12 1.50" .500" 2 11/16" RDCH-43
R4 1.250" TREM125-MOD-R4-3 M16 1.75" .500" 3 15/16" RDCH-43/HFDCH-43/SXEH-432
R4 1.500" TREM150-MOD-R4-3 M16 1.75" .500" 3 15/16" RDCH-43/HFDCH-43/SXEH-432
R6 1.500" TREM150-MOD-R6-2 M16 1.75" .750" 2 15/16" RXCH-63/OXCH-634

† TREM075-MOD-R3-2 does not come with top clamp.

‡ Uses RDCH-43 Inserts only.


Modular Screw-On Head ExtensionsModular Screw-On Head Extensions

Modular Screw-On Head Extensions

Modular Tool Head Extensions
Modular Extensions
Cutting Dia. Extension Part No. Overall Length Shank Diameter
.750" ME-0750-18MM-900 9" 18mm
1.000" ME-1000-25MM-1100 11" 25mm
1.250" ME-125/150-25MM-1200 12" 25mm
1.500" ME-125/150-25MM-1200 12" 25mm

Dapra milling products are made in the USA.