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Central bore 3D Models
Find the best Central bore 3D Models, free download in STL, FBX, GLB, OBJ, 3MF, USDZ for 3D modeling and creation in Blender, 3D printing, game developing, animation, eCommerce, AR/VR and etc. Generated by Tripo AI 3D Generator.
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// Based on the provided engineering drawing.
// NOTE: Standard gear parameters (Module, Pressure Angle) are estimated
// as they are not explicitly defined in the drawing in a standard format.
// =========================================================
// 1. Defining Standard Gear Parameters (Estimated for Functionality)
// =========================================================
// Module (m): Determines the size of the teeth. (2mm is common for 3D printing)
m = 2;
// Number of Teeth (N): Estimated visually from the top view.
N = 20;
// Pressure Angle (p): Standard angle for involute gears.
p = 20;
// Helical Angle (alpha_h): The angle of the 'V' slope (estimated visually at 30 degrees)
alpha_h = 30;
// =========================================================
// 2. Dimensions from the Drawing
// =========================================================
// Bore Diameter (D_bore): 0.9 (units, assuming mm)
D_bore = 0.9;
// Keyway Depth (d_keyway): 0.19 (from the center line to the flat)
d_keyway = 0.19;
// Face Width (L_total): The overall axial length of the teeth (using 2.4 as the face width of each segment and adding a small gap)
L_segment = 2.4;
L_gap = 0.2;
L_total = (L_segment * 2) + L_gap;
// =========================================================
// 3. Calculated Parameters
// =========================================================
// Pitch Diameter (Dp = m * N)
Dp = m * N;
// Outside Diameter (Do = Dp + 2*m)
Do = Dp + 2*m;
// Twist Angle (Calculated based on helical angle and face width)
// This is the total twist applied over the segment length.
twist_angle = (L_segment / Dp) * 360 * tan(alpha_h);
// =========================================================
// 4. Main Module to Create the Gear
// =========================================================
module herringbone_gear() {
// 1. Create the first helical half (Half A)
// Twist applied is positive
translate([0, 0, L_total / 2 - L_segment / 2])
linear_extrude(
height = L_segment,
twist = twist_angle,
slices = 100
) {
// Placeholder for Gear Profile - must be replaced with a proper involute profile.
// For a correct gear, ensure you are using a proper involute_gear() module.
// Example: involute_gear(m=m, N=N, p=p);
// --- Using a simple polygon approximation for the spur gear profile to show the twist effect ---
$fn = N * 5; // Higher detail
circle(d=Do);
// ------------------------------------------------------------------------------------------------
}
// 2. Create the second helical half (Half B)
// Twist applied is negative (or mirrored)
translate([0, 0, L_total / 2 + L_segment / 2])
mirror([0, 0, 1]) {
translate([0, 0, L_total / 2 - L_segment / 2]) // Re-aligning the translation for the mirror
linear_extrude(
height = L_segment,
twist = twist_angle, // Same angle, but mirrored on the Z-axis
slices = 100
) {
// Placeholder for Gear Profile - must be the same as above
$fn = N * 5;
circle(d=Do);
}
}
// 3. Central Bore Cutout
difference() {
// The combined helical gear shape
translate([0, 0, -L_total/2]) // Center the gear model around Z=0
children(); // This holds the two halves created above
// Cylinder for the Bore
cylinder(d=D_bore, h=L_total * 2, center=true);
// Keyway Cutout
// Flat width at depth d_keyway
keyway_width = 2 * sqrt((D_bore/2)^2 - (D_bore/2 - d_keyway)^2);
// Making the keyway cut deeper than the gear length
translate([0, -(keyway_width / 2), 0])
cube([D_bore * 2, keyway_width, L_total * 2], center = true);
}
}
// =========================================================
// 5. Final Rendering](https://tripo-data.rg1.data.tripo3d.com/tripo-studio/20250928/0c20856f-30f7-49de-8d37-413eb29ffabc/studio_mesh.webp?Key-Pair-Id=K1676C64NMVM2J&Policy=eyJTdGF0ZW1lbnQiOlt7IlJlc291cmNlIjoiaHR0cHM6Ly90cmlwby1kYXRhLnJnMS5kYXRhLnRyaXBvM2QuY29tL3RyaXBvLXN0dWRpby8yMDI1MDkyOC8wYzIwODU2Zi0zMGY3LTQ5ZGUtOGQzNy00MTNlYjI5ZmZhYmMvc3R1ZGlvX21lc2gud2VicCIsIkNvbmRpdGlvbiI6eyJEYXRlTGVzc1RoYW4iOnsiQVdTOkVwb2NoVGltZSI6MTc3NzI0ODAwMH19fV19&Signature=I~erGCId8Z0wbHW1V9WgfLR-eRA~ftsY8Z~TAXJykIwG3vXbHQd-cQUKeKWGRDxu1Q0Y8kN~95CRHX0F~JGU2OAAmEBZNp1MexNEFeR5OEbSKfvn~pBDJWQEYSeWNNueeq-1q24~hJXcPZWOlgDgdAng-IOdtRSgqYM-WU9Pfc9loBJjOhRzaA9IV9QIsPz7wfdeULSWW-01MiIpWUeVohDj-9jryKyZ91Fazgq41Wh7hSWL1o5zzuKko4tdB2mNK5ghfvEBGFaRbSLEUADvjqWffd436ROynzeX137sgTl4GrL9fnKQcKySA25DSENg7ajTAWTIbJsxb1FQTurZWw__)
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