Timing Pulley Hobs
CTI timing pulley hobs cut synchronous-belt pulleys for classical trapezoidal belts (MXL, XL, L, H, XH, XXH) to ISO 5294, metric T and AT belts to DIN 7721, and proprietary HTD, PowerGrip GT and Synchroflex forms to the belt maker's drawing, in M2, M35, ASP 2030, ASP 2052, ASP 2060, S290 and S390 high-speed steels (conventional and powder-metallurgy) with TiN, TiCN, TiAlN, AlCrN (Alcrona) and Altensa PVD coatings. Pulleys for steel, aluminum and plastics are all within range. Typical lead time is 6–8 weeks.
Belt profiles we cut
| Belt family | Typical pitches | Notes |
|---|---|---|
| HTD (curvilinear) | 3M, 5M, 8M, 14M, 20M | Round-tooth form for high torque |
| PowerGrip GT / GT2 / GT3 | 2MGT, 3MGT, 5MGT, 8MGT, 14MGT | Modified curvilinear for low backlash |
| Classical trapezoidal | MXL, XL, L, H, XH, XXH | Inch-pitch trapezoidal to ISO 5294 (Uniroyal/PowerGrip origin) |
| Metric T and AT | T2.5, T5, T10, T20, AT5, AT10, AT20 | Metric trapezoidal to DIN 7721; Synchroflex forms |
Send your pulley drawing or belt specification and we will confirm the hob form. Every hob is made to order; we do not carry stock, and lead time is confirmed on the quote.
Applications
- Automotive engines: camshaft and balance-shaft timing pulleys.
- Industrial machinery: synchronous drives in packaging, printing and machine tools.
- Conveyors and automation: linear-motion and indexing drives.
Why buy CTI tooling through CTI-USA
- Every major belt family. HTD, PowerGrip GT, Synchroflex, Uniroyal and classical trapezoidal profiles, so one supplier covers your whole pulley range.
- One manufacturer, every gear cutting tool. Hobs, shaper cutters, power skiving cutters, broaches and milling cutters from Capital Tool Industries, a single ISO 9001 source in Patiala, India, so profiles and tolerances are consistent across your process.
- Materials and coatings that fit the job. M2, M35, ASP 2030, ASP 2052, ASP 2060, S290 and S390 high-speed steels (conventional and powder-metallurgy); TiN, TiCN, TiAlN, AlCrN (Alcrona) and Altensa PVD coatings. Our engineers recommend the combination for your workpiece, hardness and volume. Properly specified coatings typically extend tool life 3–8× compared with uncoated tools.
- Inspection you can read. Each tool is measured on Klingelnberg equipment and ships with its report.
- US-based support. Prints, technical questions and quotes are handled from Hudson, Ohio (Monday–Friday, 8:00 am–5:00 pm Eastern); we reply within one business day. Typical lead time is 6–8 weeks.
- Resharpening and recoating. We arrange resharpening and recoating of hobs, shaper cutters and broaches of any make, so you get the full regrind life out of every one.
Send us a print
Email a part drawing or tool drawing to sales@cti-usa.co or use the request-a-quote form (PDF, DWG, DXF, STEP, IGES or an image, up to 8 MB through the request form; larger files by email (ask for a transfer link over 20 MB)). Tell us the belt type and pitch (or the pulley drawing), pulley material, tooth-count range, and annual volume, and we will recommend a tool steel and coating with the quote. We reply within one business day; typical lead time is 6–8 weeks.
Frequently asked questions
Which timing belt profiles can you make hobs for?
Classical trapezoidal (MXL through XXH) to ISO 5294, metric T and AT to DIN 7721, and HTD, PowerGrip GT and Synchroflex forms to the belt maker's drawing, plus custom forms.
What do you need to quote a timing pulley hob?
The belt type and pitch (or the pulley drawing), the pulley material, the number of teeth range you will cut, and your annual volume.
Can one hob cut pulleys with different tooth counts?
Usually. Like a gear hob, a timing pulley hob covers a tooth-count range for a given belt pitch; very small tooth counts may need a dedicated hob, which is why we ask for the range you will cut.
Related pages and guides
Send us a print and we will get started.
Our engineers will recommend the tool steel and coating for your job and quote it. Typical lead time 6–8 weeks.