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公司名稱(chēng) 蘇州斯托茨機(jī)電設(shè)備有限公司
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所在地 蘇州市
廠商性質(zhì) 其他
更新時(shí)間 2024/12/8 8:56:17
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促銷(xiāo)時(shí)間：

特價(jià)說(shuō)明：

促銷(xiāo)詳細(xì)：

2020年01月08日至 2020年02月08日

特價(jià)促銷(xiāo)

模內(nèi)澆口分離自動(dòng)化，降低對(duì)人的依賴(lài)度；傳統(tǒng)的塑膠模具開(kāi)模后產(chǎn)品與澆口相連，需二道工序進(jìn)行人工剪切分離，模內(nèi)熱切模具將澆口分離提前至開(kāi)模前，消除后續(xù)工序，有利于生產(chǎn)自動(dòng)化，降低對(duì)人的依賴(lài)。

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詳細(xì)信息在線詢(xún)價(jià)

United States, Canada, and United Kingdom use the Unified of Unified Inch profile, in accordance with the Unified and American Screw Threads – ASA B1.1-1989.

UNC – Unified National Coarse
UNF – Unified National Fine
UNEF – Unified National Extra Fine
UNS – Unified National Special
UNR – Unified National Round (round root)
ISO – International Standards Organization (metric)

Two major Unified thread series are in use: UN and UNR. For the UN series, you specify C
(coarse), F (fine), or EF (extra fine), as required. For the UNR series, the root radius must also be specified.
The UNR series screws are better for fatigue because the root radius reduces stress concentrations. The
basic thread geometry for ISO and Unified threads is n below.
Thread Standards and Definitions
Pitch (p) – The distance between adjacent thread forms measured parallel to the thread axis.
Lead (L) – The distance the nut moves parallel to the screw axis when the nut is given one turn.
TPI (n) – The number of Threads Per Inch, related to the pitch by p = 1/n.
Root (minor) Diameter – Smallest diameter of screw - dr.
Major Diameter – Largest diameter of screw - dc (sometimes designated as d).
Mean (pitch) Diameter – Average diameter of screw - dm (sometimes designated as dp).
Lead Angle (λ) – The angle defining the inclination of the thread (see figure below).
Helix Angle (ψ) – The angle between the thread axis and the lead angle (ψ + λ = 90o).

Thread Classifications: There are three classes of thread fit;
Loose (where the joint is frequently disassembled) – Class 1
Standard (general assembly) – Class 2
Close (high accuracy, fine fits) – Class 3
Designations for each class and the type of thread (inside or outside) for Unified and Metric are given above.

Nomenclature: Examples of the nomenclature for specifying a threaded fastener are given below for Unified National and Metric specifications.

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