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4B 的 Easifit 斗提机畚斗螺栓设计很特别，螺柱头部是六角形的，拧紧螺母时用专门工具固定
六角形的螺柱头部防止螺栓转动。其他类型螺栓的凸点、尖牙设计是为了能咬进皮带防止拧紧螺母时螺栓的转动，而 Easifit 不需要咬进皮带，对皮带没有任何损伤。这种螺栓特别适合维修场合，尤其是当只更换畚斗，不换皮带的时候非常有用，因为这个时候皮带上的螺栓孔往往已经被拉长扩大，不再适合用有凸点或尖牙的螺栓。
Specifications
| Easifit | Size | Head Diameter | Max. Torque | Package Quantity | Package Weight |
| (in.) | (mm) | (Nm) | (kgs) | ||
| 1/4 x 3/4 | 25 | 12 | 100 | 1.82 | |
| 1/4 x 1 | 25 | 12 | 100 | 1.88 | |
| 1/4 x 1-1/4 | 25 | 12 | 100 | 2.04 | |
| 5/16 x 3/4 | 30 | 25 | 100 | 2.84 | |
| 5/16 x 1 | 30 | 25 | 100 | 3.02 | |
| 5/16 x 1-1/4 | 30 | 25 | 100 | 3.24 | |
| 5/16 x 1-1/2 | 30 | 25 | 100 | 3.48 | |
| 5/16 x 1-3/4 | 30 | 25 | 100 | 3.68 | |
| 3/8 x 1 | 32 | 46 | 100 | 4.56 | |
| 3/8 x 1-1/4 | 32 | 46 | 100 | 4.70 | |
| 3/8 x 1-1/2 | 32 | 46 | 100 | 5.10 | |
| 3/8 x 1-3/4 | 32 | 46 | 100 | 5.50 | |
| 3/8 x 2 | 32 | 46 | 100 | 5.90 |
Standard zinc plated; self colour and stainless options on request.
Accessories
Easifit 螺栓专用工具
Easifit 斗提机畚斗螺栓安装时需要一个专用棘轮扳手，拧紧螺母时，用这个棘轮扳手握住螺栓的六角形端头防止螺栓的转动。棘轮扳手可以是标准的手板型也可以是气动型。
Elevator Bolt Hardware
Along with the various types and sizes of elevator bolts, 4B offers all of the hardware required for each fastener.
For more information on all elevator bolt hardware specifications, see our full bolt catalogue by clicking the link below.
FAQ's
FAQ - Elevator Bolts
How long of an elevator bolt do I need?
When installing buckets on an elevator belt, use this simple formula:
(belt thickness + bucket back thickness + washer thickness + nut thickness + 1/4 inch)
What grade are 4B elevator bolts?
4B elevator bolts meet or exceed ISO Grade 5.8 / SAE Grade 2 standards. The bolt grade guide below is for bolt diameters of 6mm (1/4") to 12mm (1/2"):
BOLT GRADE GUIDE:
| ISO Grade | SAE Grade | Min. Tensile Strenghth (psi) |
|---|---|---|
| 5.8 | 2 | 74000 |
| 8.8 | 5 | 120000 |
| 10.9 | 8 | 150000 |
What torque setting should I use?
An ideal installation will result in the elevator bolt head fitting snuggly just below the surface of the belt after tightening (Image B). However, never exceed the maximum recommended torque as shown in the tables below:
MAXIMUM RECOMMENDED TORQUE FOR 4B ELEVATOR BOLTS METRIC ISO GRADE 5.8
| Bolt Dia. | in. lbs. | ft. lbs. | nm |
|---|---|---|---|
| M6 | 72 | 6 | 8 |
| M7 | 115 | 10 | 13 |
| M8 | 168 | 14 | 19 |
| M10 | 336 | 28 | 38 |
| M12 | 588 | 49 | 66 |
MAXIMUM RECOMMENDED TORQUE FOR 4B ELEVATOR BOLTS SAE GRADE 2 OR 302 STAINLESS STEEL
| bolt dia. | in. lbs. | ft. lbs | nm |
|---|---|---|---|
| 1/4" | 72 | 6 | 8 |
| 5/16" | 156 | 13 | 18 |
| 3/8" | 276 | 23 | 31 |
| 1/2" | 684 | 57 | 77 |
How do you install an elevator bolt?
The head of the elevator bolt should lie against the inside surface of the elevator belt with the nuts and washers on the inside of the elevator bucket. An ideal installation will result in the elevator bolt head fitting snuggly just below the surface of the elevator belt.
Do you have any maintenance recommendations?
After initial installation, it is recommended that the bucket elevator be run for approximately four hours. After which the bolts should be re-tightened to ensure that there are no loose parts. Periodic inspections are always recommended to check for any issues that may occur during the life of the elevator, including checks for loose or damaged elevator bolts.
Images
Videos
Design Services
斗提机设计服务
斗提机设计服务
4B 迄今为止已为各行各业设计了数百种斗提机，包括动物饲料、粮食储运加工、面粉加工、麦芽酿酒行业到水泥、煤炭和其他重工业。
得益于 4B 的深厚技术储备和全球范围的广泛应用经验，我们的工程师精于计算设计各种斗提机。只要您能提供关键指标，我们的工程师就能为您提供详细的设计细节，达到最理想的生产能力和卸料特性。我们既可以为您设计全新的斗提机系统也可以改造提升现有的斗提机系统，达到节能降耗，提高效率的目的。
获得免费的斗提机计算数据
为了我们能更有效地处理您的需求，请尽可能准确地输入这个表格里的各项参数。
4B 迄今为止已为各行各业设计了数百种斗提机，包括动物饲料、粮食储运加工、面粉加工、麦芽酿酒行业到水泥、煤炭和其他重工业。
得益于 4B 的深厚技术储备和全球范围的广泛应用经验，我们的工程师精于计算设计各种斗提机。只要您能提供关键指标，我们的工程师就能为您提供详细的设计细节，达到最理想的生产能力和卸料特性。我们既可以为您设计全新的斗提机系统也可以改造提升现有的斗提机系统，达到节能降耗，提高效率的目的。
获得免费的斗提机计算数据
为了我们能更有效地处理您的需求，请尽可能准确地输入这个表格里的各项参数。
