Revolving / Stationary Die Heads SD

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Revolving / Stationary Die Heads SD

External Threading Revolving / Stationary Die Heads SD

Revolving/Stationary Die Heads – Model SD.

📌 Purpose:

Compact, Adjustable, and Precision-Driven for Versatile Threading Applications.

The Model SD Die Head is a compact, solid, and fully adjustable tool designed to operate efficiently in tight machining spaces - ideal for machines with limited tooling clearance. Its positive size adjustment mechanism ensures accurate decimal sizing and precise thread fits.

🏗️ Machine Compatibility:

Model SD Die Heads can be seamlessly mounted on:

v  Centre lathes

v  Capstans and turret lathes

v  Semi-automatic machines

v  Drilling machines and Milling machines

v  Radial drilling machines

v  CNC, VMC and HMC machines

🛠️ SD Die Head Technical Data

Model

Model Size / Chaser Set

Capacity (mm)

Capacity (inch)  [BSW, UNF, UNC]

ØD

L/A

L2/B

Ød2

Short Cutting (Dia x Length)

Pipe Capacity (inch)  [BSP, NPT]

Shank Options –  O.D. /d

Shank  –  I.D. /d1

SD - Approx Weight (Kg.)

SD-1

5/16"

2–8 mm

3/32" – 5/16"

46

49

24

12.5

11 mm × 12 mm

—

5/8” or 20 mm

3/8”

0.700 Kg. / 0.800 Kg.

SD-2

1/2"

4–14 mm

3/16" – 9/16"

64

67

32.5

22

16 mm × 24 mm

1/8" – 1/4"

1” or 30 mm

5/8”

1.800 Kg. / 1.900 Kg.

SD-3

3/4"

6–18 mm

1/4" – 3/4"

88

86

21

24

22 mm × 35 mm

1/8" – 1/2"

1-1/2” or 40 mm

24 mm

3.800 Kg. / 3.900 Kg.

SD-4

1"

10–24 mm

3/8" – 1"

102

88

42

37

30 mm × 40 mm

1/8" – 3/4"

1-1/2” or 40 mm

11/16”

5.800 Kg. / 5.900 Kg.

SD-5

1-1/4"

12–30 mm

1/2" – 1-1/4"

117

90

49.5

42

35 mm × 45 mm

1/4" – 1"

2-1/8” or 60 mm

1-3/8”

9.500 Kg. / 9.600 Kg.

📝 Important Ordering Note: When placing an order for SD models, please specify the required shank size [ e.g., SD-1: 5/8" or 20mm] to ensure compatibility with your machine spindle. Additionally, kindly purchase the appropriate chaser set based on the material you intend to process. [ Special MT Shanks: Supplied on request at an additional cost, depending on the availability of the required MT shank size. ]

Engineered for reliability, speed, and precision in high-performance threading operations.

🤖 Smart Function:

🧭 Function	📖 Description	🎯 Benefit
🔄 Direct Single-Finish Threading	Achieves final thread in one pass—no need for separate reference and finish cuts	Saves time and reduces operational costs
🧩 Interchangeable Chasers	Easily swap chasers for different thread sizes and types	Expands tool versatility across multiple threading applications
🧱 Durable Alloy Construction	Made from hardened alloy steel for strength and precision	Ensures long-lasting performance and consistent thread quality
🔗 Dual Configuration Options	Available in both stationary and revolving models	Adapts to various machine setups and threading requirements
📏 Broad Threading Capacity	Supports threading from 2 mm to 30 mm (3/32″ to 1-1/4″)	Covers a wide range of threading tasks with one tool family
🛠️ Multiple Shank Compatibility	Offered in various shank sizes (5/8″, 1″, 1-1/2″, 2-1/8″)	Fits different machine spindles for flexible integration
⚙️ Precision-Ground Chasers	Chasers manufactured to tight tolerances	Produces clean, accurate threads with minimal finishing needed
📦 Compact & Lightweight Design	Engineered for easy handling and installation	Enhances operator comfort and boosts productivity

🔑 Key Advantages:

v  Universal Machine Fit: Universal Machine Compatibility Designed for maximum adaptability; SD die-heads are compatible with horizontal lathes for unlimited threading lengths, as well as vertical drilling, milling machines and radial drilling machines with rotating, reversing spindles - when equipped with a special MT shank for short-length threading. They are also suitable for CNC, VMC and HMC machines in short-threading applications, This versatility makes them a dependable choice for both traditional and automated machining setups.

v  Threading Flexibility: Supports both right-hand and left-hand threads with dedicated chasers for each.

v  Chaser Compatibility: Accepts all standard Coventry HSS chase sets, only the proper chaser size is required.

v  Material Suitability: Optimized for ductile metals like MS, CI Casting, Low Carbon Steel, Aluminium and Copper, and also suitable for Steel.

v  Cost-Efficient Threading: Achieve precise, high-speed threading across multiple sizes using a single die-head - minimizing tooling costs and maximizing productivity. Ideal for high-volume production environments where accuracy and efficiency are critical.

v  User Requirement: For best performance, operation by a skilled machinist is recommended.

v  Affordable Solution: More economical than conventional SDH models, particularly in larger sizes.

v  High-Speed Output: Enables threading faster than DH Model and suited for rapid multi-size threading at low cost.

⚡️Quick & Easy Installation – Model SD:

Fast Setup for Accurate and Efficient Thread Cutting

Model SD High-Precision Die Heads are designed to cut threads quickly and accurately, making them ideal for both small batch production and heavy-duty operations. These die-heads can be mounted on center lathes, capstans, turret lathes, semi-automatic machines, drilling machines, as well as VMC and HMC machines.

Mounting Instructions:

v  The die-head shank is inserted into the tailstock of a lathe or directly into a machine spindle.

v  The workpiece is secured in a chuck or dedicated fixture.

v  Threading is performed using a set of four chasers (No. 1 to 4) arranged in a clockwise sequence and housed in dedicated recesses. These are held firmly by a front plate.

Chaser Replacement:

1. Loosen the four screws securing the front plate.
2. Rotate the plate counterclockwise to remove it and access the chasers for insertion or replacement.

Thread Size Adjustment:

v  To adjust the thread diameter:

Ø  Loosen one adjusting screw and tighten the opposite.

Ø  Initially, set the head to a slightly larger diameter than needed.

Ø  Gradually adjust in the smaller direction until the desired thread size is achieved - eliminating backlash and ensuring accurate results.

🎯 High-Precision Features:

v  Consistent Thread Accuracy: Delivers uniform, high-quality threading across large production volumes, ensuring minimal deviation and superior fit.

v  Fine Thread Diameter Adjustment: Equipped with knurled adjusting screws and engraved calibration lines for micrometric regulation of thread size.

v  Precision-Ground Components: All critical parts are manufactured to close tolerances, enabling seamless assembly, smooth performance, and reliable interchangeability.

v  Stable Cutting Performance: Rigid construction and optimized cutting dynamics reduce vibration, enhance surface finish, and extend tool life.

v  Speed-Optimized Operation: Performs efficiently within a wide RPM range (100–600), with excellent results even on materials with hardness up to 20 HRC.

v  Single-Cut Functionality: Roughing and finishing thread cuts achieved without tool change - just a simple handle adjustment.

v  Precision Engineering: Designed for high-speed, accurate thread cutting, suitable for low-volume production and heavy-duty jobs alike.

📐 Technical Operating Range:

v  Threading Speed: Recommended threading speed: 100–600 RPM, depending on material hardness, thread size/pitch, and chaser condition. (Always use coolant for finish-grade threads and longer tap life.)

v  Material Hardness: 0–20 HRC

v  Maximum Threading Length: Offers unlimited threading lengths on horizontal lathes, while supporting short-length threading applications on vertical drilling machines, milling machines, CNC, and VMC setups.

v  Mounting Shank Dimensions (MT Shank GP Dia):

Taper	Dia (inch)	Dia (mm)
MT1	0.475”	12.0650
MT2	0.700”	17.7800
MT3	0.938”	23.8252
MT4	1.231”	31.2674
MT5	1.748”	44.3992

🛠️ Maintenance Note:

To extend the life of this tapping attachment or any die head, die holder, or tap chuck avoid constant use at upper or lower limit capacities. Consider rotating between two or three units for heavy-duty applications.

🔩 Chaser Thread Standards

Thread	Full Form	Description
NPT	National Pipe Taper	Tapered thread used in U.S. pipe fittings. Creates a seal via thread interference.
BSP	British Standard Pipe	Common in Europe and Asia. Includes BSPT (tapered) and BSPP (parallel) threads.
BSW	British Standard Whitworth	Coarse thread with rounded crests and roots. Used in older British machinery.
UNF	Unified National Fine	Fine-pitch thread used in precision applications. Part of the Unified Thread Standard.
UNC	Unified National Coarse	Coarse-pitch thread for general fastening. Also part of the Unified Thread Standard.
Metric	ISO Metric Thread	International standard. Uses millimeter-based pitch and diameter.

🧰 Where They're Commonly Used

v  NPT: Plumbing, gas lines, hydraulic systems (mostly in North America)

v  BSP: Water and fluid systems (Europe, Asia, Australia)

v  BSW: Restoration, vintage British equipment

v  UNF/UNC: Automotive, aerospace, general engineering (U.S. and Canada)

v  Metric: Global standard for bolts, screws, and fasteners

🏭 Chaser Material -  Performance Comparison

Feature	M2	M2 + Coating	M35	M35 + Coating
Base Material	HSS (no cobalt)	Same + surface coating	HSS + 5% cobalt	Same + surface coating
Heat Resistance	Moderate	Improved	High	Excellent
Wear Resistance	Good	Better	Very Good	Superior
Tool Life	Standard	Longer	Long	Longest
Thread Finish	Acceptable	Smoother	Clean	Best-in-class
Cost	Low	Slightly higher	Higher	Highest
Ideal Use	Mild steel, alloys	Medium-duty runs	Stainless, tool steel	High-speed, tough jobs

⚙️ Estimated Production Ratios (Relative Tool Life)

Chaser Type	Relative Tool Life	Typical Usage Ratio*
M2	1× (baseline)	40–50%
M2 + Coating	~1.5×	20–25%
M35	~2×	15–20%
M35 + Coating	~2.5–3×	10–15%

*These ratios reflect how often each type might be used in a mixed production setup, assuming cost and performance are balanced.

🔍 Production Insights

v  M2 is suitable for short-run jobs or general-purpose threading where cost is a priority.

v  M2 with coating offers better performance in medium-duty production, especially with coolant-assisted threading.

v  M35 is built for demanding materials like stainless steel and excels in automated setups.

v  M35 with coating is the top-tier choice for continuous, high-speed production with minimal downtime.

💡 Decision Tip

If your production involves frequent threading of hard materials or long cycle times, investing in M35 with coating can reduce tool changes and improve consistency. But for cost-sensitive, low-to-medium complexity jobs, M2 or M2 with coating may be more economical.

🎯 "Intelligent Quick-Analysis Tool Designed For Discerning Business Customers." 🎯

 

🛠️ SD Model Revolving/Stationary Die Heads – Dimensional Range Smart Overview

Model	Size	Capacity (mm)	Capacity (inch)  [BSW, UNF, UNC]	Chaser Set	Short Cutting (Dia x Length)	Pipe Capacity (inch)  [BSP, NPT]	Shank Options	SD - Approx Weight (Kg.)
SD-1	5/16"	2–8 mm	3/32" – 5/16"	5/16”	11 mm × 12 mm	—	5/8” or 20 mm	0.700 Kg. / 0.800 Kg.
SD-2	1/2"	4–14 mm	3/16" – 9/16"	1/2”	16 mm × 24 mm	1/8" – 1/4"	1” or 30 mm	1.800 Kg. / 1.900 Kg.
SD-3	3/4"	6–18 mm	1/4" – 3/4"	3/4”	22 mm × 35 mm	1/8" – 1/2"	1-1/2” or 40 mm	3.800 Kg. / 3.900 Kg.
SD-4	1"	10–24 mm	3/8" – 1"	1”	30 mm × 40 mm	1/8" – 3/4"	1-1/2” or 40 mm	5.800 Kg. / 5.900 Kg.
SD-5	1-1/4"	12–30 mm	1/2" – 1-1/4"	1-1/4”	35 mm × 45 mm	1/4" – 1"	2-1/8” or 60 mm	9.500 Kg. / 9.600 Kg.

 🔩 SD Model Stationary Die Head – Quick Smart Summary

Compact, precision-driven, and universally compatible, the SD model is engineered for high-speed external threading in tight machining spaces—ideal for both small batch and heavy-duty production.

🔑 Key Features

v  🔧 Compact Design: Slim profile fits machines with limited tooling clearance—perfect for capstans, turret lathes, and semi-automatics.

v  🎯 Micrometric Thread Control: Knurled adjusting screws with engraved calibration lines allow fine thread diameter tuning.

v  🔄 Single-Cut Threading Mode: Switch between roughing and finishing cuts via handle—no tool change required.

v  🧰 Universal Machine Fit: Mounts on center lathes, radial drills, CNC, VMC, HMC, and vertical machines with MT shank.

v  🔁 Thread Direction Flexibility: Supports both right-hand and left-hand threads using dedicated chasers.

v  🧪 Material Versatility: Optimized for MS, CI, low carbon steel, aluminum, copper, and steel.

v  💸 Cost-Efficient: More economical than SDH models, especially in larger sizes—ideal for high-volume threading.

⚙️ Operating Highlights

v  🚀 Threading Speed Range: Efficient between 100–600 RPM, depending on material hardness and chaser condition.

v  📏 Unlimited Thread Length: On horizontal lathes; short-length threading supported on vertical, CNC, and VMC setups.

v  🔧 Quick Chaser Replacement: Four-screw front plate system enables fast chaser swaps.

v  📐 Thread Size Adjustment: Loosen one screw, tighten the opposite—start large, adjust smaller for precision.

v  🛠️ Mounting Options: Supplied with straight shank; Morse taper (MT1–MT5) shanks available on request.

📌 Safety & Performance Tips

v  💧 Use Coolant: Apply cutting fluid to improve finish and extend tool life.

v  ⚠️ Avoid Overload: Rotate between units for heavy-duty use; avoid constant operation at capacity limits.

v  ✅ Correct Setup: Confirm chaser seating and handle position before threading.

v  🧪 Trial Cut First: Always verify thread size with a test cut before full production.

 

🔩 SD Model Stationary Die Head – Quick Smart Analysis

Compact, precision-engineered, and cost-effective, the SD model offers reliable external threading for tight machining setups and high-volume production.

Aspect	Details
🔧 Type	Stationary Die Head – manually operated, non-self-opening threading tool
⚙️ Function	Enables external threading with manual control over thread length and release
🔄 Mechanism	Solid-body design with knurled screws for micrometric thread diameter adjustment
📐 Thread Range	Supports metric and imperial thread sizes via standard Coventry HSS chasers
🛠️ Applications	Suitable for threading on lathes, radial drills, CNC, VMC, HMC, and vertical machines
✅ Advantages	Economical for large sizes – High-speed threading – Precise thread control – Compact for tight spaces
🏭 Use Case	Center lathes, capstans, turret lathes, semi-automatics, drilling, milling, CNC, VMC, HMC machines

v  Overview: Stationary Die Heads (SD) are designed for external threading with manual release and micrometric control. They feature:

Ø  Compact Body for tight tooling spaces

Ø  Right- and Left-Hand Thread Compatibility with dedicated chasers

Ø  Thread Diameter Adjustment via knurled screw with calibration lines

Ø  Single-Cut Threading Mode (roughing or finishing) without tool change

Ø  Precision-Ground Components for smooth, vibration-free threading

v   Threading Control & Adjustment: SD die heads allow:

Ø   Micrometric Thread Sizing by loosening one screw and tightening the opposite

Ø  Quick Chaser Replacement using four screws and a front cover plate

Ø  Unlimited Thread Length on horizontal lathes; short-length threading on vertical and CNC machines

v  Benefits

Ø  Cost-Efficient for larger sizes compared to SDH models

Ø  High-Speed Threading up to 600 RPM depending on material and chaser condition

Ø   Universal Machine Fit: center lathes, turret lathes, radial drills, CNC, VMC, HMC, vertical machines

Ø  Thread Direction Flexibility with interchangeable chasers

v  Ideal For: Batch production, semi-automatic setups, and environments requiring compact threading tools with precision control and economical operation.

TOOLS AND APPLIANCES CORPORATION

BLOCK NO.: 135/2, BILESHWARPURA, P.O. CHHATRAL - 382729,

TA. KALOL ( N.G.), DIST. GANDHINAGAR.

MO. 6355213404, 6355251586,

Email :- taco@imitoolsindia.com, salestaco@imitoolsindia.com.