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Product · Rotary motion

Timing Belt Pulleys

Custom-bore timing belt pulleys in all standard tooth profiles — HTD, GT, MXL through XH.

We machine timing (synchronous) pulleys from raw bar — your bore, your keyway, your tooth profile, your finish. Standard profiles (HTD 3M / 5M / 8M / 14M, MXL, XL, L, H, XH) ship to drawing; custom curvilinear or trapezoidal profiles are quoted from your belt-supplier spec.

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Wolfer timing belt pulley · HTD 3M / 5M / 8M / 14M, GT, MXL–XH profiles · precision-machined in China

What we make

Timing Belt Pulleys we cut from drawings.

Six categories by tooth profile and bore type. Click any to see its profile diagram and real dimension tables, or download the full PDF datasheet.

Wolfer Plain-Bore HTD Timing Belt Pulleys
Straight-bore HTD timing pulleys Catalog PDF →

HTD curvilinear teeth · 3M / 5M / 8M / 14M · plain bore
Wolfer Plain-Bore Trapezoidal Pulleys (MXL/XL/L/H)
Straight-bore trapezoidal timing pulleys Catalog PDF →

Trapezoidal (imperial) · MXL / XL / L / H · plain bore
Wolfer T-Series Metric Timing Belt Pulleys
T-Series metric timing pulleys Catalog PDF →

Metric T / AT · T2.5 / T5 / T10 / AT5 / AT10
Wolfer Precision-Profile (BAR / GT) Pulleys
Precision-profile timing pulleys (BAR / GT) Catalog PDF →

Precision BAR / GT arc profile · high accuracy
Wolfer Taper-Bore Trapezoidal Pulleys (L/H/XH)
Taper-bore trapezoidal timing pulleys (L/H/XH) Catalog PDF →

Taper-bushed · L / H / XH trapezoidal
Wolfer Taper-Bore HTD Timing Belt Pulleys (5M/8M/14M)
Taper-bore HTD timing pulleys (5M/8M/14M) Catalog PDF →

Taper-bushed · HTD 5M / 8M / 14M

What we make

Timing pulleys machined to drawing

HTD curvilinear

3M / 5M / 8M / 14M · most common modern profile

GT-style

2GT / 3GT / 5GT — for higher-precision linear motion

Trapezoidal

MXL / XL / L / H / XH — legacy industrial standard

Custom profile

Cut to your belt supplier's tooth spec

Idler pulleys

Smooth-OD or flanged-only, with bearing bores

Timing pulleys live on motor shafts and idler axes in 3D printers, packaging lines, semiconductor robots, and surgical equipment. Mismatched tooth profiles cause belt walking; bore concentricity errors cause belt-tension oscillation that wears the belt prematurely.

We cut every pulley from solid bar (no castings), so concentricity between the bore and the pitch diameter is held to ≤ 0.03 mm. Pulleys come with or without flanges, with custom keyways, set-screw flats, or taper-bushing bores.

For OEMs who change shaft sizes across motor families, we hold the tooth-cut tooling and re-machine the bore — meaning you can re-order the same pulley body with a different bore in 7–10 days.

Standards

Built to international tolerance specs.

  • ISO 5294 (HTD)
  • ISO 5296 (timing-pulley dimensions)
  • DIN 7721

Inspection

Every part measured before it ships.

  • CMM — bore concentricity, pitch-diameter runout
  • Tooth-form projector
  • Surface roughness tester
  • Bore go / no-go gauges

Applications

Where these parts go to work.

01 / 04

Industrial Automation

Packaging-line synchronous motion, conveyor positioning

02 / 04

Semiconductor Equipment

Wafer-stage drives, gantry idlers

03 / 04

Robotics

End-effector and joint drives where backlash matters

04 / 04

Medical Devices

Lab-automation pipetting, surgical-instrument actuation

FAQ

Common questions from engineers buying this product.

Can you copy an obsolete OEM pulley?

Yes — send the worn part. We scan it on the CMM, identify the tooth profile, and build a CAD pack. You get a first article in ~10 working days.

What is the minimum order quantity?

One. We routinely make single-unit replacement pulleys for OEMs whose original supplier has discontinued the part.

Related products

Often quoted together.

Gears

Custom precision gears, built from your drawings — spur, helical, bevel, worm, and internal.

View product →

Sprockets

Roller-chain sprockets and custom industrial chain wheels — hardened teeth, custom hubs.

View product →

Couplings

Rigid and flexible shaft couplings — including jaw couplings, beam (helical-slit) couplings, diaphragm couplings, disc couplings, bellows couplings, and Oldham couplings — all built to drawing.

View product →

Ready to start your timing belt pulleys project?

24-hour quote · engineering review within one business day · ≤ 30 days to ship after approval.

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