KALIBER 102.2

CALIBRE 102.2

CALIBRE 102.2

THE PATENTED RECIPE.

机芯

机芯

持续的创新与完善是格罗斯曼传统的组成部分。因此,年轻的格罗斯曼表厂持续进行众多自主开发。贝努动力储存腕表机芯采用贝努系列著名的经典100.2型导柱机芯,带有2/3夹板、阶梯式摆轮凸轮,以及格罗斯曼典型的微调螺丝。

它具有MORITZ GROSSMANN GLASHÜTTE I/SA品牌机芯的所有标志性特征与手工艺细节。此外,更增添了全新的格罗斯曼摆轮、经过进一步改进的格拉苏蒂棘轮、按钮式手动上链装置,以及动力储存显示。

THE STRAP WINDER WITH SETTING CROWN

THE STRAP WINDER WITH SETTING CROWN

The power needed to tension the mainspring is built up with a winding stem that enters the case at 6 o‘clock. To assure that the strap comfortably hugs the wrist, both the winding stem and the strap bar on the opposite side are inclined inward by 22°. A special bevel gear pair establishes the connection between the inclined winding stem and the horizontally orientated movement. When the watch is being wound, the strap can deliver much more torque than a crown because it is easy to grasp. The energy is swiftly transmitted via a bevel gear to two wheel sets with a high-efficiency ratio. A backstop ratchet allows bidirectional winding. Only very few back-and-forth motions of the strap are needed to fully wind the watch. Inside the case, the movement was
turned by 30°, so the timesetting crown is positioned at 4 o‘clock. As before, the handsetting mechanism is activated by pulling the setting crown.

THE STOPWORK

THE STOPWORK

Since the winding stem could turn with the strap while the watch is being worn, the backstop tolerates a certain amount of deflection without causing the stop click to instantly block the stem. The backstop and the main stopwork are dimensioned such that the engagement of a pawl requires a rotation of at least 20°.

The ratchet wheel has only eight teeth, so the stopwork cannot be overloaded when very fast winding movements are performed. In the calibre 102.2, a mainspring with a bridle – commonplace in selfwinding watches – prevents damage that could be caused by excessive force. The bridle is pressed against the inside of the mainspring barrel and generates frictional torque that as a rule is 10% higher than the maximum torque of the spring. So when the mainspring is fully wound, turning the crown is met with resistance but it does not lurch.

THE OSCILLATOR WITH STOP SECONDS

THE OSCILLATOR WITH STOP SECONDS

The Grossmann balance, modified for the TEFNUT calibres, is clearly smaller than in the larger ATUM and BENU movements. It is designed for a high moment of inertia with minimal mass and beyond the mass and poising screws offers sufficient precision adjustment options.

The stop-seconds mechanism is activated when the setting crown is pulled. A spring firmly attached to the main plate presses against the safety roller and thus prevents inadvertent contact with the polished outer surface of the balance-wheel rim or maladjustment of the delicate poising screws. The spring is controlled by a linkage-type slide that for the strap winder is connected directly with the arresting spring and is thus uncoupled from the winding motion.

黄金套筒

黄金套筒

轴承宝石——白色蓝宝石水晶——安装于凸出的黄金套筒中。与所安装的、分别由手工退火的钢质螺丝一起,它们突显于夹板表面上方。这一凸起式布局以传统格罗斯曼腕表为蓝本,由此可以拆卸并清洁单独轴承宝石,而不会在组装时对夹板造成伤害。

手工雕刻

手工雕刻

2/3夹板上的所有镌刻,以及擒纵轮板和摆轮凸轮上的镌刻都由手工完成。

技术规格

  • 机芯 102.2型自制机芯,手动上链,五方位调校
  • 零件 200个
  • 宝石 19颗宝石,其中3颗安装在以螺丝固定的黄金套筒中
  • 擒纵系统 锚式擒纵
  • Oscillator Shock-resistant Grossmann balance with 4 inertia and 2 poising screws, Nivarox 1 balance spring
  • 摆轮 直径:10.0毫米,振频:21.600次/小时
  • 动力储存 上满链48小时
  • 功能 小时与分钟显示
  • Special features Shock-resistant balance with inertia and poising screws, impulse pin integrated in rim / flat balance spring / balance staff with integrated safety roller / index adjuster with Grossmann micrometer screw / plate movement with 3/5 plate, frame pillars, and separately removable clutch winding mechanism / frame parts in untreated German silver / raised gold chatons with pan-head screws / remodified Glashütte stopwork with backlash / mainspring barrel with bilateral jewel bearings for optimised power management / ARCAP train wheels / proprietary escapement with 18-tooth escape wheel
  • 机芯尺寸 直径:26.0毫米,厚度:4.2 毫米