Grafton, Wisconsin Since 1929
Cold Formed Products
& Band Saws
Bar stock that is stronger, more precise and more economical than machined parts, and the band saws built to cut it. Designed, rolled and sold by Grob.
2,100+
Stock Profiles
95+
Years of Manufacturing
100,000
Square Foot Plant
60+
Technicians & Engineers
What Is Grob Rolling
Precision Profiles.
Formed, Not Cut.
Grob Rolling cold forms steel and aluminum bar into gear, spline and pulley profiles. Material is displaced instead of removed, so every tooth comes out stronger, smoother and more consistent than a machined one.
You buy the profile as long bar stock and cut it to length in your own shop: no custom tooling per part and no minimum order on our 2,100+ standard profiles.
Spur Gears
14.5° and 20° gear stock from 6 to 48 DP, in steel and aluminum, ready to cut to length.
Spline Shafts
Grob standard, SAE, ANSI B92.1, ISO 14, DIN 5480 and ball splines, stocked in 1117 steel.
Timing Pulleys
XL, MXL, L, H, HTD, GT and metric T and AT profiles, formed to belt pitch and sold by the foot.
Why Choose Cold Formed
The Grob Rolling
Advantage
Cold forming displaces material instead of cutting it, creating stronger parts with a superior surface finish and zero material waste. Grob has refined this process for more than 70 years.
Stronger
Tooth Profile
Rolling rearranges the grain structure across the whole profile. The greatest strength gain is at the root, exactly where stress is highest.
Superior
Surface Finish
Displacement forming leaves smoother flanks than hobbing or cutting, reducing noise, friction and lubrication over the life of the part.
Zero
Material Waste
No chips, no cutting fluid, no scrap. Material is displaced, not removed, making cold forming cleaner and faster than conventional methods.
Cost-Effective
& Scalable
High-speed bar production means large quantities at consistent quality. Standard profiles ship fast; custom tooling is developed quickly.
Product Capabilities
Stock & Custom
Cold Formed Products
Stock Products
- Spur gears6–48 DP, 14.5° or 20°
- Spline shaftsGrob, SAE, ANSI, ISO, DIN, Ball
- Timing pulleysXL, MXL, L, H, HTD, GT, T, AT
- Broached sleevesMatched to Grob splines
- Bar diameter0.25″ to 6″
Custom & Machining
- Custom splines & profilesTooling developed quickly for your exact geometry.
- Forging blanksCold forged blanks ready for your finishing operations.
- CNC machiningMilling and turning of cold formed bar to finished parts.
- Precision grindingCenterless bar and surface grinding to tight tolerances.
Industries & Applications
Where Grob Parts
Are Used
From precision instrumentation to heavy industrial machinery, cold formed gears, splines and pulleys carry critical loads across every major industry.
Defense
High-reliability precision parts for defense and military platforms.
Healthcare
Precision motion control for medical devices and diagnostic equipment.
Scientific
Positioning systems, lab automation and precision instrumentation.
Grob Band Saws
Band Saws Built to
Run for Decades
American-made vertical band saws, blade welders, guides and holders. Every Grob saw is designed to match its metal-cutting application and deliver dependable operation year after year.
Don’t Have a Drawing?
Have a Sample Part but
No Specifications?
Grob can reverse engineer your gear or spline. If you have a worn or legacy part with no number or drawing, follow our four-step identification guide, or send us the sample and we’ll measure it with CMM and gear-checking software.
Ready to Start
Your Project?
Whether you need stock bar today, a custom profile or a new band saw, our team responds within one business day. Three ways to reach us: