ISO 5294 Synchronous Belt Drive & DIN 6885 Keyway Standard 1:1 DXF · SVG · PDF Default Spec: 64 × 16 × 32 mm (T=3mm)

Synchronous Timing Belt Pulley & Keyed Shaft Sprocket Generator (GT2 / HTD DXF)

1:1 CAD ENGINE READY

Synchronous Timing Belt Pulley & Keyed Shaft Sprocket Generator (GT2 / HTD DXF)

1CAD Style & Material SetupMechanical

Select CAD Style / Model (36)Search & Filter

Material Stock Preset (Auto-Sets Caliper T & Kerf K)

Display Units

Scale Lock

1:1 True Scale

2Dimensions (1:1)Millimeters (mm)

Pitch Diameter (D_p mm)64 mm

Center Shaft Bore (Ø mm)16 mm

Number of Teeth (Z / N)32 mm

Thickness (T mm)

Laser Kerf (K mm)

3Brand Logo & 1:1 ExportZero Login

2D & 3D Brand Logo Mockup:

📤 Upload Logo

Print Artwork Bleed Guide:

Embed Spec Sheet & 50mm / 1" Scale Bars (Added on separate DIMENSIONS layer)

Pre-Flight Geometry Audit8/8 PASSED

PASS
Closed Outer Contours: 6 closed LWPOLYLINE cut loop(s) verified
PASS
Zero Duplicate Cut Paths: 240 unique segments (0 laser double-burns)
PASS
Flute & Kerf Tolerance Guard: T=3.00mm, K=0.100mm within structural limits
PASS
ISO Layer Color Separation: CUT (Red), CREASE (Blue), SCORE (Emerald), DIMENSIONS isolated
PASS
1:1 Physical Unit Header: Explicit mm/in SVG viewBox + DXF $INSUNITS=4 + 50mm PDF bar
PASS
Exact 2D Cut Bounding Parity: Cut Bounds 64×64mm === Blank Size
PASS
2D ↔ 3D Kinematic Model Sync: Archetype 'timing_pulley_gt2' synced (1 3D component(s))
PASS
True Vector Sheet Nesting Sync: 1:1 vector paths mapped to multi-up sheet grid

100%

CUT (0.43m) CREASE/SCORE (0.22m)● 6 Loops · Est. Cut: ~21s

1:1 Synced · Blank: 64 × 64 mm

2D 1:1 Unfolded Vector BlueprintBlank: 64 × 64 mm (2.52" × 2.52")

3D Interactive Fold & Orbit (Kraft Board)

80%

0%100%

Camera:

Yaw: -28°Pitch: 24°

⟳ Drag Anywhere to Rotate 3DL=64 × W=16 × H=32mm

Outside Diameter (OD)

64 mm

Tooth Count (Z)

32 Teeth

Circular Belt Pitch

6.28 mm

Center Shaft Bore

Ø 16.0 mm

Structural & Manufacturing Specification Summary

Quick Default Download: ↓ .DXF ↓ .SVG ↓ .PDF

Synchronous timing belt pulleys (such as GT2, HTD 3M/5M, and XL profiles used in CNC machines, 3D printers, and robotics) require rounded root gullets and smooth crest transitions so the toothed elastomer belt engages with zero backlash. Our parametric timing pulley generator computes the exact circular tooth pitch (P = pi × D_p / N), traces a continuous closed sinusoidal-arc outer tooth profile, cuts a concentric shaft bore with an integrated DIN 6885 anti-rotation keyway slot, and adds 4 radial lightening holes on larger pulleys.

CUT LAYER #EF4444 (ACI 1)

CREASE / BEND #2563EB (ACI 5)

SCALE HEADER $INSUNITS=4 (1:1 mm)

SIMULATION 2D + 3D + Nesting

Pre-Calibrated Industry Sizes (2)

Standard Product Presets Built on This Timing Belt Pulley & Sprocket Engine

72 × 16 × 36 mm (T=3mm)

36-Tooth Timing Belt Pulley (Ø72mm)

36-Tooth Synchronous Pulley | Pitch Circle Ø72.0 mm | Circular Pitch 6.28 mm | 3.0–6.0 mm Face Width

Load Preset Spec →

80 × 16 × 40 mm (T=3mm)

40-Tooth Timing Belt Pulley (DXF)

40-Tooth Synchronous Belt Driven Sprocket (Ø80.0 mm Pitch Circle, 6.28 mm Circular Pitch)

Load Preset Spec →

Structural Geometry & Allowances

Mathematical Blank & Tolerance Formulas

Circular Belt Pitch from Pitch Diameter & Tooth Count (P_belt)

P_belt = (pi * D_pitch) / N_teeth

Relates Pitch Diameter (L) and Tooth Count (H) to the linear belt pitch (e.g., set L = 38.2mm and H = 60 teeth for a 2mm GT2 pitch, or L = 64mm and H = 32 teeth for a 6.28mm pitch).

Pulley Outside Crest Diameter (D_outside)

D_outside = D_pitch - 2 * PLD (or D_pitch + 0.15 * P_belt)

Computes the outer crest diameter and rounded tooth root gullet depth (0.34 × P_belt) for smooth belt meshing.

DIN 6885 Shaft Keyway Slot Width (W_key)

W_key = max(2.5 mm, 0.28 * D_bore)

Dimensions the integrated anti-rotation keyway slot at the top of the central shaft bore.

Pre-Press & Production SOP

Step-by-Step Export & Assembly Guide

1 Enter Pitch Diameter D_p (in Length L), Shaft Bore Diameter (in Width W), and Number of Pulley Teeth N (in Height H).
2 Set Material Thickness (T) and Laser/CNC Kerf Compensation (K).
3 Inspect the continuous closed tooth profile, DIN 6885 keyway bore, and radial lightening holes in the 2D and 3D views.
4 Export as 1:1 .DXF or .SVG for laser cutting, waterjetting, or CNC milling; optional side cheek flanges can be cut using the Pitch Circle diameter + 4mm.

Board Caliper, Laser & Die-Cutting Reference

Material Thickness, Creasing Matrix & Laser Kerf Settings

Material / Sheet Stock	Caliper Thickness (T)	Recommended Tooling / Laser Setup	Allowance / Kerf Spec	Primary Use Case
6.0mm Delrin / Acetal (POM) Homopolymer	6.00 mm (1/4 in)	CO2 Laser or 1/16" Carbide Endmill CNC	Kerf K: 0.10mm / Low-friction self-lubricating teeth	Robotics belt drives, camera sliders, custom 3D printer reduction pulleys
5.0mm–6.35mm 6061-T6 Aluminum Plate	5.00 – 6.35 mm	Abrasive Waterjet, Wire EDM, or CNC Mill	DIN 6885 Keyed Shaft Bore	CNC router axis drives, electric Go-Kart / e-bike sprockets, automation conveyors
6.0mm Cast Acrylic / Polycarbonate	6.00 mm	CO2 Laser (K = 0.14mm)	Visual educational & light-duty motion drives	Prototyping ratio verification, kinetic sculptures, educational gearboxes

Packaging & CNC Engineering FAQ

Frequently Asked Questions — Timing Belt Pulley & Sprocket

How do I calculate the exact Pitch Diameter (L) for a 2mm GT2 or 5mm HTD belt?

Multiply your desired Tooth Count (H) by the belt pitch and divide by pi (3.14159). For example, a 40-tooth GT2 pulley (2mm pitch) has D_p = (40 × 2) / 3.14159 = 25.46mm; a 32-tooth HTD-5M pulley (5mm pitch) has D_p = (32 × 5) / 3.14159 = 50.93mm.

Why does the central shaft bore include a rectangular notch at the top?

That is a standard DIN 6885 shaft keyway slot. It allows you to slide a square machine key or D-shaft flat adapter into the bore so the pulley transmits high torque without spinning on the motor shaft.

When are the 4 circular lightening holes automatically added?

Whenever the radial web between the central keyway bore and the tooth root circle is wide enough to fit at least Ø6.0mm holes with safe wall margins, the generator automatically places 4 concentric lightening/bolting holes.