Overview

This document provides detailed specifications, materials, dimensions, and usage recommendations for various types of clamping knobs, hand knobs, pull knobs, and related accessories used in mechanical and industrial applications.

1. Stainless Steel Wing Knobs

• Material: Stainless steel (SCS13A), electropolished finish.
• Dimensions: Various sizes with thread types M5×0.8 to M10×1.5.
• Weight ranges from approximately 11.5g upwards depending on size.
• Accessories: Locating receivers (CP735), protective covers (CP735-P), adjustable-torque wrenches (CP-TCW), and multiple types of one-touch clamping locators.
• CAD models available at https://www.imao.com/en/.

2. Aluminum Hand Knobs

• Material: Aluminum alloy (AC4B) with buffed finish; dimensions may vary slightly due to finishing.
• Types: Tapped and reamed versions available.
• Sizes: Diameters from 25mm to 40mm, with thread sizes M8×1.25 to M16×2.
• Weights range from 8g to 90g depending on size and type.

3. Cast Iron Hand Knobs

• Material: Gray cast iron (FC200) or ductile cast iron (FCD450) with black powder baked finish.
• Types: Bored, reamed, and tapped versions.
• Sizes: Diameters from 40mm to 100mm with thread sizes M8×1.25 to M20×2.5.
• Weights vary widely, from approximately 70g to over 1,300g depending on size and type.

4. Stainless Steel Hand Knobs

• Material: Stainless steel (SCS13A or SUS303), electropolished or buffed finish.
• Types: Stud, reamed, tapped blind, and tapped through-hole versions.
• Sizes: Diameters from 32mm to 63mm with thread sizes M6×1 to M12×1.75.
• Weights range from 37g to 435g depending on size and type.
• Recommended for use in food processing and washing machines due to corrosion resistance.

5. Bar Knobs

• Material: Ductile cast iron (FCD450) with black powder baked finish.
• Thread sizes: M12×1.75 to M24×3.
• Dimensions and weights vary; example weights range from 315g to 600g.

6. Plastic Lobe Knobs

• Material: Black polyamide (6 nylon) plastic pad with polypropylene knob and black oxide steel screw (SUM22L).
• Features: Plastic pad can be fitted over the screw's ball end to protect soft workpieces during clamping.
• Knob is glued to the screw for secure assembly.

7. EK Series Knobs (Steel and Stainless Steel Inserts)

• Types: Blank, reamed, tapped, stud versions available.
• Materials: Steel (SUM22) with black oxide finish and stainless steel (SUS303).
• Sizes: Diameters from 40mm to 80mm with thread sizes M8×1.25 to M16×2.
• Features: Prepared hole on the side of the hub for fixing-pin machining in reamed types.
• Limitations: Plastic parts may degrade in hot or highly humid environments.

8. Stainless Steel Pull Knobs

• Material: Stainless steel (SUS303), electropolished.
• Dimensions: Various sizes with thread sizes M4×0.7 to M8×1.25.
• Accessories: Same locating receivers and protective covers as wing knobs.

9. LKN and LKS Stainless Steel Grip Knobs

• Material: Stainless steel (SUS304 and SUS303).
• Types: Stud, tapped blind, tapped through-hole versions.
• Features: Increased knob height for excellent grip; suitable for food processing and washing machines.
• Sizes: Diameters from 3mm to 10mm with thread sizes M3×0.5 to M10×1.5.

10. Knurled Thumb Knobs (TKN, TKS Series)

• Materials: Steel (SS400, S45C), stainless steel (SUS303), chrome plated or black oxide finish.
• Types: Stud (partly and fully threaded), tapped versions.
• Sizes: Diameters from 3mm to 10mm with various thread sizes.
• Features: Partly-threaded studs prevent knob loss from panel boards.

General Notes and Recommendations

• Dimensions may have slight variations due to finishing processes such as buffing or electropolishing.
• For maximum leverage and holding force, it is recommended to insert a bar between the prongs of wing knobs.
• Plastic components should be used cautiously in hot or humid environments to avoid deterioration.
• Many products are suitable for hygienic applications such as food processing due to stainless steel construction and corrosion resistance.
• CAD models and additional product information are available online at https://www.imao.com/en/.