{"product_id":"t-dm22-differential-adjuster-for-optic-mounts-14-80-ext-thread-05-mdiv","title":"T-DM22 - Differential Adjuster for Optic Mounts, 1\/4\"-80 Ext. Thread, 0.5 µm\/Div.","description":"\u003cp\u003eT-DM22 - Differential Adjuster for Optic Mounts, 1\/4\"-80 Ext. Thread, 0.5 µm\/Div.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFine Adjustment Range: 250 µm\u003c\/li\u003e\n\u003cli\u003eFine Adjustment per Revolution: 25 µm\u003c\/li\u003e\n\u003cli\u003eCoarse Adjustment Range: 0.72\" Long 1\/4\"-80 Threads\u003c\/li\u003e\n\u003cli\u003eCoarse Adjustment per Revolution: 0.012\" (80 TPI)\u003c\/li\u003e\n\u003cli\u003eOn-Axis Load Capacity: 11 lbs (5 kg)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe T-DM22 Differential Adjuster uses two internal leadscrews; one pushes the center spindle forward at 400 µm per revolution while the other pulls it back at 375 µm per revolution.\u003c\/p\u003e\n\u003cp\u003eThe resultant total forward motion of the center spindle is just 25 µm for one complete revolution of the graduated knob. Each small graduation of the fine control knob is 0.5 µm; the smallest incremental move for the T-DM22 is approximately 50 nm. When performing fine adjustment the coarse adjustment mechanism can be locked by means of a small locking collar.\u003c\/p\u003e\n\u003cp\u003ePrior to installation, the adjuster should be greased slightly. To install the adjuster, screw the threads into the bushing by hand. Ensure that cross threading does not occur in order to avoid damage to the adjuster and bushing.\u003c\/p\u003e\n\u003cp\u003eIf the fine adjustment knob on the T-DM22 is ever removed from the actuator body, it can be reattached. \u003c\/p\u003e\n\u003ch3\u003eFine Adjustment Knob Reattachment for Differential Adjusters\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep 1:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eFully remove the detached knob.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep 2:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eApply pressure to the tip of the actuator.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep 3:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eWhile maintaining pressure, screw in the knob 2 to 3 threads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep 4:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eOnce threaded, remove pressure from Step 2 and continue to slowly screw in the knob. Please note that this should be done slowly and with little force. If too much force is applied, cross-threading may occur and may damage the threads.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA differential adjuster consists of four basic parts: outer body, coarse adjustment lock, inner spindle, and fine adjustment knob. Using the T-DM22 as an example, the video to the left demonstrates how these four parts come together to create a device that allows for coarse and fine adjustments. Also detailed are two different methods of mounting these actuators into an assembly.\u003c\/p\u003e\n\u003cdiv class=\"tableFloatRight\"\u003e\n\u003ch2\u003eDifferential Adjuster Mechanisms\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eOuter Body:\n\u003cul\u003e\n\u003cli\u003eProvides Coarse Adjustment\u003c\/li\u003e\n\u003cli\u003eContains Internal Threads with a Pitch Smaller than the External Threads of the Inner Spindle\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003eCoarse Adjustment Lock:\n\u003cul\u003e\n\u003cli\u003ePrevents the Outer Body from Rotating; Locks Coarse Translation\u003c\/li\u003e\n\u003cli\u003eEnables Fine Adjustment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003eInner Spindle: \n\u003cul\u003e\n\u003cli\u003eMounted within Outer Body\u003c\/li\u003e\n\u003cli\u003eContacts the Moving Platform and will Translate with the Coarse Adjuster\u003c\/li\u003e\n\u003cli\u003eContains External Threads with Greater Pitch than the Internal Threads of the Outer Body\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003c\/strong\u003eFine Adjustment Knob:\u003cbr\u003e\n\u003cul\u003e\n\u003cli\u003eInternal and External Threads that Match the Inner Spindle and the Outer Body Threads\u003c\/li\u003e\n\u003cli\u003eRotating the Knob Provides Inner Spindle Translation that is Equal to the Difference Between the Two Thread Pitches\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Fosco Connect","offers":[{"title":"Default Title","offer_id":49083703034112,"sku":"T-DM22","price":506.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0388\/5331\/2557\/files\/1578-xl.jpg?v=1785203815","url":"https:\/\/alotechparts.com\/products\/t-dm22-differential-adjuster-for-optic-mounts-14-80-ext-thread-05-mdiv","provider":"Alo Tech Solutions","version":"1.0","type":"link"}