Overview
Set screws with cone points, commonly referred to as concave point set screws, are specialized fasteners used to secure rotating components like gears, pulleys, and collars onto shafts. Their cone-shaped tip bites into the shaft surface, creating a strong mechanical bond that resists loosening under vibration or torque. These screws are widely used in machinery, automotive systems, and industrial equipment where precise positioning and reliability are critical. They are available in various materials, including alloy steel for high-strength applications and stainless steel for corrosion resistance. Standard sizes range from M2 to M12, with metric and imperial thread options. The cone point design distinguishes them from other set screws, such as flat or cup point variants, by offering superior holding power.
Structure and Working Principle
A set screw with a cone point consists of a threaded body and a conical tip. The threaded portion engages with a tapped hole in the rotating component, while the cone tip presses directly against the shaft. When tightened, the cone tip creates a small indentation in the shaft, increasing friction and preventing axial or rotational movement. This design is particularly effective for permanent or semi-permanent assemblies, as the indentation ensures repeatable positioning. However, it may cause minor damage to the shaft surface, making it less suitable for applications requiring frequent adjustments. The screw’s effectiveness depends on factors like thread pitch, material hardness, and installation torque.
Key Features
The primary advantage of cone point set screws is their exceptional grip strength, which outperforms flat or cup point designs in high-vibration environments. The cone tip concentrates force onto a small contact area, maximizing friction and minimizing slippage. Additionally, these screws are often heat-treated or coated (e.g., black oxide or zinc plating) to enhance durability and corrosion resistance. Another notable feature is their versatility. They can be used with shafts of varying diameters, provided the screw size matches the application’s load requirements. However, users should avoid over-tightening, as excessive torque can strip threads or deform the shaft. For critical applications, thread-locking adhesives are recommended to prevent loosening.
Application Areas
Cone point set screws are widely employed in industries requiring precise mechanical assemblies. In automotive systems, they secure timing pulleys and transmission components. Industrial machinery uses them for couplings, bearings, and motor mounts. They are also common in robotics, aerospace, and medical equipment, where vibration resistance and positional accuracy are paramount. These screws are unsuitable for dynamic or frequently disassembled joints due to the permanent indentation they create. For such cases, alternative fasteners like clamping collars or knurled screws may be preferable. Always verify compatibility with shaft material (e.g., avoid soft metals like aluminum unless specified).
Maintenance and Precautions
Proper installation is crucial for optimal performance. Use a torque wrench to apply the manufacturer’s recommended tightening force, ensuring the cone tip embeds securely without damaging the shaft. Inspect screws periodically for signs of wear, corrosion, or loosening, especially in high-stress environments. Avoid reusing screws in critical applications, as their grip strength may diminish after removal. For corrosive environments, stainless steel or coated screws are advisable. Lubrication is generally unnecessary and may reduce friction, compromising the screw’s holding power. If disassembly is required, consider replacing the screw and inspecting the shaft for damage.
B2B Procurement Guide
When sourcing cone point set screws, prioritize suppliers with ISO or DIN certifications to ensure quality and dimensional accuracy. Key specifications to confirm include thread size, material grade, hardness (e.g., Rockwell C scale), and coating type. Bulk purchases typically offer cost savings, with prices ranging from $0.10 to $2.00 per unit depending on size and material. For custom applications, some manufacturers provide screws with tailored thread lengths or tip angles. Lead times vary but are generally shorter for standard sizes. Request samples to test compatibility with your shafts before large-scale orders. Always check for compliance with industry standards like ASTM F837 for stainless steel screws.
Related Manufacturers
- 主营：不锈钢螺栓、热镀锌螺栓、光伏配件、顶丝、高强度螺栓
- 主营：内六角顶丝、六角螺栓、螺母、紧固件
- 主营：建筑螺栓、地脚螺栓、不锈钢螺栓、建筑配件
- 主营：螺母、螺栓、螺钉、垫圈、铆钉、组合螺丝、自攻螺丝、钻尾螺丝、紧定螺丝、销轴、膨胀螺丝、螺柱、牙条、挡圈、机械零件、索具、螺丝钉、弹簧、车床加工
- 主营：内六角螺丝、弹簧垫圈、不锈钢螺丝、顶丝、外六角螺栓、电子螺丝、平垫、高强度螺丝、铜螺柱、铜螺丝、钛螺丝、压铆螺丝、抽芯铆钉、压铆螺母、点焊螺丝、弹性螺母、圆头十字螺丝、空心铆钉、组合螺丝、卡式螺母
- 主营：紧固件、达克罗、自攻钉、自攻丝、圆柱头、五金零件、十字沉头、圆杯螺丝、沉头螺丝、黑色螺丝、防锈达克、黑色盐雾螺丝、黑色圆头螺丝、沉头自攻螺丝、盐雾平杯螺丝、盐雾杯头螺丝、黑色自攻螺丝、圆头自攻螺丝、黑色十字螺丝、圆头内六角螺丝
- 主营：导向带、液压接头、dichtomatik90
- 主营：不锈钢螺栓、不锈钢螺母、膨胀螺栓、光伏支架、钻尾丝、高强度螺栓、热镀锌螺栓、全螺纹丝杆
- 主营：不锈钢螺栓、不锈钢索具、不锈钢螺母、不锈钢钻尾钉、不锈钢膨胀螺栓、平键销、轴销钉、收紧器、骑马卡、合螺丝、接地线、避雷针、支撑架、固定销、螺丝帽、护栏母、斜拉杆、套筒母、预埋件、圆螺母、扁螺母、靠背销、山形卡、定位销、球面垫
- 主营：304不锈钢螺丝、304不锈钢螺栓、2205不锈钢螺丝、9级内六角凹端紧定、2205不锈钢螺栓、310S不锈钢螺丝、310S不锈钢螺栓、316不锈钢螺丝、316不锈钢螺栓、304不锈钢螺母、热镀锌螺栓、热镀锌螺丝、达克罗螺丝
- 主营：地脚螺栓、止水螺栓、螺纹螺柱、凹端止付顶丝、双头螺栓、钢筋套筒、高强度螺栓、定位销、预埋件、预埋板、异型件、合页、光伏配件、抗震配件、特氟龙螺栓、热镀锌螺栓、六角扳手
- 主营：cnc数控、车床件、内六角、五金车、led配件、自攻螺丝、螺丝平头、羊角螺帽、轴芯零件、电脑螺丝、盖帽螺母、烤漆螺丝、法兰螺丝、不锈钢带、螺丝黄铜、六角螺母、铝车削件、注塑螺母、对锁螺丝、四方螺母、数控车床、固定插销、沉头螺丝、膨胀螺丝、螺丝订做
- 主营：内六角螺栓、外六角螺栓、沉头内六角螺栓、圆头内六角螺栓、高强度螺栓、法兰螺栓、自攻螺丝、钻尾自攻螺丝、十字自攻螺丝、碳钢螺丝、304不锈钢、黄铜螺丝、尼龙隔离柱、六角螺柱、法兰螺母、膨胀锚栓、T型螺母
- 主营：大扁头、弹垫片、螺丝帽、五金件、装潢钉、平垫圈、钢丝箍、六角柱、螺丝钉、螺母柱、迫壁虎、平垫片、十字槽、平弹垫、膨胀钉、卡管夹、紧固件、非标螺丝、六角螺母、焊接螺母、吊顶通丝、波形垫圈、尼龙螺丝、拉铆螺母、塑料螺丝
- 主营：爬锥、螺栓、光伏配件、无头止付顶丝、螺母、销轴、地脚螺栓、套筒、抗震支架、焊钉、钢结构螺栓、内六角扳手、止水螺杆、E型定位销、钢结构拉条、焊接预埋件、束口套筒