• UDT 521-4246 Heller Bit 4-Flute SDS MAX Bit
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UDT 521-4246 Heller Bit 4-Flute SDS MAX Bit

UDT 521-4246 Heller Bit 4-Flute SDS MAX Bit

The UDT 521-4246 Heller Bit 4-Flute SDS MAX Bit is a heavy-duty rotary hammer drill bit engineered for fast, efficient penetration into concrete, masonry, and stone, sourced direct from Korea.

Key features

  • Four-flute carbide-tipped designs like this are commonly used in demolition and construction applications where rapid debris evacuation and reduced heat buildup are critical for sustained high-volume drilling
521-4246 12-340 | Spec: 12 | Overall Length: 340
521-4255 12-540 | Spec: 12 | Overall Length: 540
521-4264 14-340 | Spec: 14 | Overall Length: 340
521-4273 14-540 | Spec: 14 | Overall Length: 540
521-4282 16-340 | Spec: 16 | Overall Length: 340
521-4291 16-540 | Spec: 16 | Overall Length: 540
521-4307 18-340 | Spec: 18 | Overall Length: 340
521-4316 18-540 | Spec: 18 | Overall Length: 540
521-4325 20-320 | Spec: 20 | Overall Length: 320
521-4334 20-520 | Spec: 20 | Overall Length: 520
521-4343 22-320 | Spec: 22 | Overall Length: 320
521-4352 22-520 | Spec: 22 | Overall Length: 520
521-4361 24-320 | Spec: 24 | Overall Length: 320
521-4370 24-520 | Spec: 24 | Overall Length: 520
521-4389 25-320 | Spec: 25 | Overall Length: 320
521-4398 25-520 | Spec: 25 | Overall Length: 520
521-4404 28-370 | Spec: 28 | Overall Length: 370
521-4413 28-570 | Spec: 28 | Overall Length: 570
521-4422 30-370 | Spec: 30 | Overall Length: 370
521-4431 32-370 | Spec: 32 | Overall Length: 370
521-4440 32-570 | Spec: 32 | Overall Length: 570
521-4459 35-570 | Spec: 35 | Overall Length: 570
521-4468 40-570 | Spec: 40 | Overall Length: 570
Hammer Drill Bits & Concrete DrillsUDT
23 product codes available in this family
Sourced direct from KoreaExport-ready supplyCompetitive pricing
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UDT 521-4246 Heller Bit 4-Flute SDS MAX Bit

Brand UDT·Hammer Drill Bits & Concrete Drills

Available part numbers (23)

521-4246, 521-4255, 521-4264, 521-4273, 521-4282, 521-4291, 521-4307, 521-4316, 521-4325, 521-4334 + 13 more — see full table ↓

How to order

Send the UDT part numbers and quantities through our RFQ form or to info@prosourcemro.com. We confirm price, availability and lead time within 1 business day — no account needed.

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Product codes & specifications
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RFQ List (0)
Product codeSpec
521-424612-340 | Spec: 12 | Overall Length: 340
521-425512-540 | Spec: 12 | Overall Length: 540
521-426414-340 | Spec: 14 | Overall Length: 340
521-427314-540 | Spec: 14 | Overall Length: 540
521-428216-340 | Spec: 16 | Overall Length: 340
521-429116-540 | Spec: 16 | Overall Length: 540
521-430718-340 | Spec: 18 | Overall Length: 340
521-431618-540 | Spec: 18 | Overall Length: 540
521-432520-320 | Spec: 20 | Overall Length: 320
521-433420-520 | Spec: 20 | Overall Length: 520
521-434322-320 | Spec: 22 | Overall Length: 320
521-435222-520 | Spec: 22 | Overall Length: 520
521-436124-320 | Spec: 24 | Overall Length: 320
521-437024-520 | Spec: 24 | Overall Length: 520
521-438925-320 | Spec: 25 | Overall Length: 320
521-439825-520 | Spec: 25 | Overall Length: 520
521-440428-370 | Spec: 28 | Overall Length: 370
521-441328-570 | Spec: 28 | Overall Length: 570
521-442230-370 | Spec: 30 | Overall Length: 370
521-443132-370 | Spec: 32 | Overall Length: 370
521-444032-570 | Spec: 32 | Overall Length: 570
521-445935-570 | Spec: 35 | Overall Length: 570
521-446840-570 | Spec: 40 | Overall Length: 570

Need a different model, or a part not listed here? Send us your parts list →

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