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About this product

The Bolt Threading Machine by National Cutting Tools is an industrial machine tool engineered for precision external thread cutting on solid steel bolts, anchor studs, threaded rods, and fastener blanks. Producing bolts on general-purpose lathe machines requires multiple tool passes and skilled turners; this dedicated bolt threader cuts finished, full-depth threads in a single pass at production rates up to 100 to 200 bolts per hour. Featuring an all-geared headstock driven by an electric motor, the machine uses an adjustable die head fitted with four tangential HSS chasers. The workpiece is clamped in a rigid, self-centering vise and fed toward the rotating die head via a positive lead screw or rack mechanism. When the preset thread length is reached, the automatic trip mechanism opens the die head cleanly, allowing instant carriage retraction without marking the finished thread. Key Features Single-Pass Full Thread Cutting: Multi-tooth tangential chasers cut completed metric, BSW, UNC, or UNF thread profiles in one continuous forward stroke. High-Rigidity Headstock: Heat-treated alloy gears provide high torque at regulated RPM to prevent tool chatter and preserve close pitch tolerances. Self-Opening Tangential Die Head: Instantaneous radial opening of cutters at the length stop eliminates thread scuffing and tool damage on reverse. Heavy Self-Centering Bar Vise: Hardened V-jaws grip hex, square, and round bars firmly on the spindle centerline to prevent eccentric threads. High Tool Life per Regrind: Tangential chaser design allows sharpening simply by grinding the front cutting face, maintaining original tooth pitch for months. Automatic Flood Coolant: Continuous coolant stream flushes hot steel swarf and lubricates cutting interfaces, ensuring mirror-smooth thread flanks. Applications High-output foundation bolt (L-type, J-type, and straight) threading Automotive and structural hexagonal bolt and stud manufacturing Transmission tower and railway track fastener threading Scaffolding tie rod and threaded anchor pin production Manufactured at the National Cutting Tools plant in Ludhiana, Punjab. Every machine is calibrated for pitch accuracy, lead linearity, and runout before release for domestic delivery or overseas export.

Specifications

Models: 1/4" to 1" (bed type) / 3/8" to 1.1/2" (bed type) / 1/2" to 2.1/2" (bed type) / 1" to 4" (pillar type)
Saddle Movement: 10" / 10"-12" / 12"-16" / 10"-12"
Spindle Speed Range: 60-90 / 60-90 / 60-90-120 / 40-75-115 RPM
Number Of Spindle Speeds: 2 / 2 / 3 / 3
Production Per Hour: 60-80 / 60-80 / 70-90 / 35-40 pieces
Motor Required: 3 HP / 3 HP / 7.5 HP / 12.5 HP, 960 RPM
Lead Screw: Optional / Optional / Optional / Provided
Approx. Weight: 500 / 550 / 990 / 1600 kg
Threading Method: Chasing with HSS tangential chasers; component held stationary, die head rotates
Thread Forms: Metric, BSP, BSPT, NPT, UNF, UNC, BSW, BSF, Acme (depends on chasers fitted)
Main Assemblies: Base, geared head stock, saddle, bed or pillar type clamping vice, die head
Gears: Case-hardened steel, hobbed for quiet running
Country Of Origin: India
Brand / Model: National Cutting Tools
Warranty: 1 Year Industrial Manufacturer Warranty

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