Threader Mastery Lesson Plan v2 Daily Lesson Plan
NORTHEAST
METRO TECH
Name:
Class/Shop/Grade: Plumbing / 10th Grade
Date: January 29, 2026
Unit/Topic: Ridgid 535 Threader Basics
P O S T E D
Agenda
Safety Briefing & PPE Check
Machine Anatomy (Machine Map)
Demo: Cut, Ream, Thread
Clean-up & Waste Disposal
Learning Objectives
Students will:
Identify 5 major components of the Ridgid 535.
Demonstrate safety switch usage.
Sequence the "Triple Threat" operation.
Language Objectives
Students will:
Define "Front Chuck" and "Rear Centering Device."
Narrate the threading sequence using trade terms.
Learning Activities & Strategies (UDL Guidelines )
Do Now/Opener/Morning Meeting
Workplace Readiness Check: Verify safety gear. Locate and identify the emergency foot switch.
Direct Instruction/Project-based & Collaborative Learning (Resources, Tools, Tech)
Part 1: Anatomy Walk (3m)
Hands-on ID of parts. Students use "Machine Map." Focus on Carriage tools.
Part 2: Threading Demo (5m)
Demo threading 1/2" pipe. Emphasize carriage pressure and oiling.
Resources: Ridgid 535, Machine Map, Scrap Pipe, NPT Oil.
Differentiation & Accommodations (IEPs, 504s, & MLs)
Visual machine map for component identification support.
Kinesthetic demo for up-close observation of mechanical tool engagement.
Exit Ticket/Summarizer/Wrap-up/Afternoon Meeting
Check for Understanding: What are the three carriage tools in order? Why is the foot pedal called a "dead man switch"?
Assignments/Projects (Due Date)
Review safety labels for machine startup; Quiz next session.
Summative Assessments (Graded)
Competency Observation: Safe startup and tool sequencing.
Reflection (What worked? Adjustments?)
Machine Map Worksheet Digital Ridgid 535: Machine Map
Digital Labeling Worksheet
Student Name:
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Date:
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Watch the demonstration. Identify each numbered component by typing the Name and its Function in the white boxes below.
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Component Name:
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Purpose/Function:
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Component Name:
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Component Name:
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Purpose/Function:
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Component Name:
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Purpose/Function:
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Component Word Bank
Rear Centering Device Safety Foot Switch Carriage Lever Front Hammer Chuck Carriage Tools
Threader Reflection Prompt v2 (Digital) Technical Writing: Pipe Threading
Ridgid 535 Mastery Task
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Date:
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The Assignment
Reflect on today's machine demonstration and operation. Complete the following technical writing task by typing your responses in the boxes provided.
Paragraph 1: Technical Process
Describe the "Triple Threat" operation in detail. Explain the sequence of using the Cutter, Reamer, and Die Head. Mention the role of the Front Hammer Chuck and Carriage Lever.
5-7 Sentences
Paragraph 2: Safety Analysis
Explain why safety protocols are non-negotiable. Discuss the importance of the Safety Foot Switch and why specific PPE and workplace readiness are required.
5-7 Sentences
Part 1: The Process
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Part 2: Safety & Readiness
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Accuracy Correct Tool Order
Clarity Proper Trade Terms
Structure Sentence Count Met
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Threader Basics Slides Shop Tech 101
Threader Mastery
The Ridgid 535 Operation & Safety
Safety Protocol
Wear ANSI-approved safety glasses at all times.
Remove jewelry and secure loose clothing/long hair.
Use the Foot Pedal for emergency stops.
"Keep hands clear of the rotating work!"
Machine Anatomy
Rear Centering Device
Front Hammer Chuck
Safety Foot Switch
Die Head
Cutter
Reamer
01
The Perfect Cut
Secure pipe in chuck.
Align cutter wheel with mark.
Tighten screw slowly as it turns.
02
Clean the Burr
Swing reamer into position.
Apply firm pressure forward.
Remove internal sharp edges.
Threading & Oil
Steady Oil Flow
Never thread dry. The machine pumps oil automatically—ensure it hits the dies.
The Die Head
Pull carriage lever forward until dies catch. Let the machine pull itself along.
Release at the Mark!
Stop threading when the pipe end is flush with the die face.
Quick Check
1
What tool removes the internal burr?
2
What is the "Dead Man" switch?
3
Why do we use centering devices?
Ready for hands-on?
Machine Map Worksheet Ridgid 535: Machine Map
Labeling Worksheet
Name: __________________________
Date: ___________________________
Use the classroom demonstration to identify the major components of the threading machine. Fill in the names and descriptions in the legend below.
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Rear Centering Device Safety Foot Switch Carriage Lever Front Hammer Chuck Carriage Tools
Machine Map Answer Key Ridgid 535: Machine Map
Teacher Answer Key
FOR TEACHER USE ONLY
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Rear Centering Device
Supports long pipe to prevent "wobble" or "whipping" during rotation.
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Front Hammer Chuck
Main gripping mechanism. Uses a hammer action to lock jaws onto pipe.
3
Carriage Tools
The Cutter, Reamer, and Die Head assembly used for threading.
4
Carriage Lever
The manual handle used to slide the carriage along the rails.
5
Safety Foot Switch
A "Dead-Man Switch" that must be depressed for machine operation.
Machine Map Handout (Digital) Machine Anatomy: Ridgid 535
Student Operation Guide
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Operational Components
Essential parts for pipe threading preparation.
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Rear Centering Device
Locks the back of the pipe to eliminate movement and ensure concentric threads across the length of the workpiece.
2
Front Hammer Chuck
The primary gripping mechanism. Uses a centrifugal "hammering" action to bite into the pipe for a secure, non-slip hold.
3
Carriage Lever
The main manual interface. Used to slide the cutting, reaming, and threading tools into position against the pipe end.
4
Carriage Tools (Cutter/Reamer/Die)
The assembly of tools that sequentially process the pipe. Must be used in the correct order: Cut, Ream, then Thread.
Master Safety Control
The machine is controlled via a Safety Foot Switch . This is a "dead-man" style control: the machine stops instantly if your foot is removed.
Always stand to the left of the pedal
Standard Operating PPE
Safety Glasses (Z87+)
No Gloves (Entanglement Risk)
Tucked hair/clothing
Technical Note
Ensure the oil reservoir is full before operation. The cooling oil is vital for thread quality and tool longevity.
Northeast Metro Tech • Plumbing & Pipefitting Reference Sheet ID: R535-REF
Threader Mastery Digital Packet v2 <table class="w-full mb-8 border-b-4 border-slate-900 pb-4"><tbody><tr><td class="text-left align-bottom"><h1 class="text-3xl font-roboto-slab font-black uppercase text-slate-900">Digital Mastery Packet</h1><p class="text-slate-500 font-bold uppercase tracking-widest text-sm italic">Ridgid 535 Pipe Threading Operation</p></td><td class="text-right align-bottom w-64"><div class="flex flex-col gap-2 items-end"><table class="w-full border-collapse"><tbody><tr><td class="text-[10px] font-black uppercase text-slate-400 pr-2 text-right">Name:</td><td class="bg-white border border-slate-400 h-8 w-48"></td></tr><tr class="h-2"><td></td><td></td></tr><tr><td class="text-[10px] font-black uppercase text-slate-400 pr-2 text-right">Date:</td><td class="bg-white border border-slate-400 h-8 w-48"></td></tr></tbody></table></div></td></tr></tbody></table>
Study Guide: Machine Anatomy
Component Primary Function Rear Centering Device Centers the pipe at the back of the machine to prevent wobble. Front Hammer Chuck The main gripping unit; requires a "hammering" motion to lock pipe. Carriage Tools The Cut/Ream/Thread units that process the pipe end. Carriage Lever The handle used to slide tools along the pipe during operation. Safety Foot Switch The master ON/OFF switch. Machine stops when foot is lifted.
Safety Protocol Reminder
• Stand to the left of the machine for optimal visibility and control.
• Ensure all hair, jewelry, and loose clothing are secured.
• Never reach over the spinning chuck while the machine is engaged.
Task 1: Machine Mapping
Refer to the machine diagram from the demonstration. Identify each numbered component. Click inside the white boxes below to type your answers.
Number Component Name Component Purpose 1 2 3 4 5
Digital Assignment • Section A complete
Task 2: Technical Reflection
Part A: The Threading Sequence
Describe the "Triple Threat" process (Cutter, Reamer, Die Head). Explain the specific steps required to complete a thread and why the order is critical for pipe integrity. (Min 5 sentences)
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