Product Description
The role of lead screw is not allowed to start a private, the goods play a protective role. Once the seal is properly locked, it can not be opened unless the violence is broken, and the damaged seal can not be reused.
Applicable scope:
1>railway, aviation, oil, customs, port, postal and other logistics industry.
2>mining, highway, finance, chemical, petroleum, container, pharmaceutical and other industries.
3>gas meter, instrument, table box and so on.
Product Description:
Product Name | Anti-theft screw / Safety screw |
Standard | ANSI / BS / DIN / GB / ISO / JIS / BSW |
Material (Available) | Iron, Carbon steel, Stainless steel, Brass, Bronze, Aluminum, Alloy steel or Customer Specified etc. |
Screw head shapes | pan, dome(button), round/truss(mushroom), flat(countersunk), oval(raised head), Hex, round with washer head, pan with washer head, etc, |
Screw drives type | Slot, Cross, Phillips ( PH ), Frearson, French recess, JIS B 1012, Mortorq, Pozidriv ( PZ ), SupaDriv ( PZ ), Square, Robertson, Hex, 12-point flange, Hex socket ( Allen ), Security hex socket ( pin-in-hex-socket ) Torx ( T& TX ), Security Torx ( TR ), Torx Plus (TR), TA, Tri-point, Tri-groove, Tri-wing, Torq-set, Spanner head (pig nose, TH), Clutch A, Clutch G, One-way, Double-square, Triple-squaare (XZN), Polydrive, 12-spline flange, Double hex, Bristol, Phillips/Slotted, Quadrex, Pentalobe, External Torx, Line female, Line female tamper etc. |
Thread type | Metric/Inch/American system |
Metric thread (outside):4h,6h,6g |
|
Metric thread (inside):5H,6H,7H |
|
Inch thread (outside):1A,2A,3A |
|
Inch thread (inside):1B,2B,3B |
|
Common thread | AB/A/B/BP/C/D/F/G/T/BF/BT/U/Triangular thread |
Surface Finished | Zinc(Yellow,White,Blue,Black),Hop Dip Galvanized(HDG) phosphorization,tin-plated, chrome plated, sandblast and anodize, Black Oxide,Geomet,Dacroment,anodization,chromate, Nickel plated,Zinc-Nickel plated,dacromat, plain, sandblast and anodize, mechanical coated and RoHS |
Hot-working, make hardness up to 8.8, 10.9, 12.9, A2-70, A480 |
|
Heat Treatment | Normalizing / Spheroidizing / Tempering / Hardening / Stress Relieving |
Certifications | SGS/ROSH (By provided by third-party testing agencies) |
Applied Area | Building, Machinery, Electronic, Furniture etc. |
Payment Terms | T/T 30% in Advance, 70% Before Shipment |
MOQ | Based on the material required by the customer |
Packing |
25kgs/carton or 1000 pcs/per box or as customers’ request. |
lead time | 7-40days, according to customer’s order qty and detailed requirements |
Shipping Port | HangZhou, China |
Product photo
Our company has a strong production capacity,we sale professional fastener and fittings.Our products meets the international quality system,such as ANSI and BS. We provide the high quality and professional fastener for construction steel, car, machinery and equipment, energy,furniture, ship, railway and so on. In the whole production process, We have professional engineers to monitor the quality,we can guarantee the quality of our product.We are committed to continuously improvement and innovation, to meet customer requirements, And work closely with our partners to provide qualified parts, competitive prices and best service to every customer. We would like to thank you for your interest in our company and hope that our website will help you. If you need more information, please contact our sales department.
Screw,bolt,nut,manufacturer/supplier in china,offering carbon steel hexagonal head combined assembly screws for fan parts,Non-standard slotted fillster screw for building,non-standard slotted fillster screw and so on.
If you are interested in any of our products, please free feel to contact us. More information of our products will be forwarded to you upon receipt of your specific inquiry.
Screw international standard | ||||
ITEM | DIN-STHangZhouRD | ISO-STHangZhouRD | GB-STHangZhouRD | DESCRIPTION IN ENGLISH |
1 | DIN1 | ISO2339 | GB117 | taper pins |
2 | DIN7 | ISO2338 | GB119-86 | parallel pins |
3 | DIN84 | ISO1207 | GB65-85 | slotted cheese head screws |
4 | DIN85 | ISO1580 | GB67-85 | slotted pan head screws |
5 | DIN93 | GB854 | tab washers | |
6 | DIN94 | ISO1234 | GB91 | split cotter pins |
7 | DIN95 | GB101 | slotted raised csk head wood screws | |
8 | DIN96 | GB99 | slotted round head wood screws | |
9 | DIN97 | GB100 | slotted countersunk head wood screws | |
10 | DIN125-A | ISO708 | GB97.1-85 | plain washers |
11 | DIN125-B | ISO7090 | GB97.2-85 | mediun washers |
12 | DIN126 | ISO7091 | plain washers | |
13 | DIN127-A | GB7244 | spring lock washers,tang ends | |
14 | DIN127-B | GB93-87 | spring lock washers,square ends | |
15 | DIN128-A | GB7245-87 | single coil spring lock washers | |
16 | DIN137-A | curved spring washers | ||
17 | DIN137-B | GB955 | wave spring washers | |
18 | DIN186 | GB37-88 | t-head bolts with square neck | |
19 | DIN188 | t-head bols with double nip | ||
20 | DIN258 | ISO8737 | taper pins with threaded end | |
21 | DIN261 | t-head bolts | ||
22 | DIN315AF | wing nuts amercia form | ||
23 | DIN315DF | GB62-88 | wing nuts germany form | |
24 | DIN316AF | wing screws amercia form | ||
25 | DIN317DF | wing screws germany form | ||
26 | DIN3179 | ball knobs | ||
27 | DIN404 | GB832-88 | slotted capstan screws | |
28 | DIN417 | ISO7435 | GB75-85 | soltted set screws with full dog point |
29 | DIN427 | ISO2342 | GB73-85 | slotted set screws with chamfered end |
30 | DIN431 | GB808-88 | pipe nuts with thread | |
31 | DIN432 | GB856-88 | external tap | |
32 | DIN433 | ISO7092 | GB848-95 | washers for cheese head screws |
33 | DIN434 | GB852-88 | square taper washers for u-sections | |
34 | DIN435 | GB852-88 | square taper washers for i-sections | |
35 | DIN436 | square washers | ||
36 | DIN438 | ISO7436 | GB74-85 | soltted set with cup point |
37 | DIN439 | ISO4035 | GB6172-86 | hexagon thin nuts |
38 | DIN439 | ISO8675 | GB6173-86 | hexagon thin nuts |
39 | DIN440 | ISO7094 | rounds washers for wood constructions | |
40 | DIN443 | sealing cap, push-in type | ||
41 | DIN444 | GB798-88 | eye bolts form | |
42 | DIN462 | internal tab washers | ||
43 | DIN463 | GB855-88 | washers with two taps | |
44 | DIN464 | GB834-88 | knurled thumb screws with collar | |
45 | DIN465 | slotted knurled thumb screws with collar | ||
46 | DIN466 | GB806-88 | knurled thumb nuts with collar | |
47 | DIN467 | GB807-88 | knurled thumb thin nuts | |
48 | DIN470 | sealing washers | ||
49 | DIN471 | GB894.1-86 | retaining rings for shafts(external),circlips | |
50 | DIN472 | GB893.1-86 | retaining rings for bores(internal),circlips | |
51 | DIN478 | square head bolts with collar | ||
52 | DIN479 | square hea bolts with half dog point | ||
53 | DIN480 | square head bolts with collar,half dog point and rounded end | ||
54 | DIN508 | t-slot nutsiso299 | ||
55 | DIN525 | single end studs | ||
56 | DIN529 | GB799-88 | masonry bolts | |
57 | DIN546 | GB817-76 | slotted round nuts | |
58 | DIN547 | GB815-88 | round nuts with drilled holes in one face | |
59 | DIN551 | ISO4776 | GB73-85 | slotted sit screws with flat point |
60 | DIN553 | ISO7434 | GB71-85 | slotted set screws with cone point |
61 | DIN555 | ISO4034 | hexagon nuts | |
62 | DIN557 | GB39-88 | -csquare nuts | |
63 | DIN558 | ISO4018 | hexagon screws | |
64 | DIN561 | hexagon set screws with full dog point | ||
65 | DIN52 | bsquare nuts without bevel(pressed nuts) | ||
66 | DIN571 | GB102-86 | hexagon head wood screws (coach screws) | |
67 | DIN580 | ISO3266 | GB825-76 | lifting eye bolts |
68 | DIN582 | lifting eye nuts | ||
69 | DIN601 | ISO4016 | hexagon bolts | |
70 | DIN603 | ISO8677 | GB14-88 | mushroom head square neck bolts (carriage bolts) |
71 | DIN604 | flat countersunk nib bolts | ||
72 | DIN605 | flat countersunk long square neck bolts | ||
73 | DIN607 | cup head nib bolts | ||
74 | DIN607 | flat countersunk shout square neck bolts | ||
75 | DIN609 | hexagon fitted bolts,long thread | ||
76 | DIN610 | hexagon fitted bolts,short thread | ||
77 | DIN653 | GB835-88 | knurled thumb screws thin type | |
78 | DIN660 | ISO1051 | GB867-86 | round head rivets |
79 | DIN661 | ISO1051 | GB869-86 | contersunk head rivets |
80 | DIN662 | ISO1051 | raised contersunk head rivets | |
81 | DIN674 | ISO1051 | mushroom head rivets | |
82 | DIN703 | adjusting rings,heavy range (shafting collars) | ||
83 | DIN705 | GB816-88 | adjusting rings,light range(shafting collars) | |
84 | DIN741 | wire rope clips | ||
85 | DIN787T | ISO299 | t-slot screws | |
86 | DIN835 | GB900-88 | studs-metal(end=2d) | |
87 | DIN906 | hexagon socket pipe plugs,conical thread | ||
88 | DIN908 | hexagon socket screw plugs,cyl.thread | ||
89 | DIN909 | hexagon head pipe plugs,conical thread | ||
90 | DIN910 | hexagon head screw plugs,cyl.thread | ||
91 | DIN911 | ISO2936 | socket wrenches | |
92 | DIN912 | ISO4762 | GB70-85 | hexagon socket cap screws |
93 | DIN913 | ISO4026 | GB77-85 | hexagon socket set screws with flat piont |
94 | DIN914 | ISO4571 | GB78-85 | hexagon socket set screws with cone point |
95 | DIN915 | ISO4571 | GB79-85 | hexagon socket set screws with dog point |
96 | DIN916 | ISO4571 | GB80-85 | hexagon socket set screws with cup point |
97 | DIN917 | hexagon cap nuts | ||
98 | DIN920 | slotted short cheese head screws | ||
99 | DIN921 | GB838-88 | slotted large cheese head screws | |
100 | DIN923 | GB830-88 | slotted pan head screws with shoulder | |
101 | DIN927 | slotted shoulder screws | ||
102 | DIN928 | GB/T13680-92 | square weld nuts | |
103 | DIN929 | GB/T13681-92 | hexagon weld nuts | |
104 | DIN931 | ISO4014 | GB5782-86 | hexagon head screws |
105 | DIN933 | ISO4017 | GB5783-86 | hexagon head screws |
106 | DIN934 | ISO4032 | GB6170-86 | hexagon full nuts |
107 | DIN934 | ISO8673 | GB6171-86 | hexagon full nuts |
108 | DIN935 | ISO7035 | GB6178-86 | hexagon slotted and castle nuts |
109 | DIN936 | ISO4035 | GB6172.1-86 | hexagon thin nuts |
110 | DIN937 | ISO7038 | GB6181-86 | hexagon thin slotted and castle nuts |
111 | DIN938 | GB897-88 | studs metal(edn=1d) | |
112 | DIN939 | GB898-88 | studs metal (end=1.25d) | |
113 | DIN940 | studs metal (end=1.5d) | ||
114 | DIN960 | ISO8765 | GB5785-86 | hexagon head bolts,metric fine pitch thread |
115 | DIN961 | ISO8676 | GB5786-86 | hexagon head bolts ,metric fine pitch thread |
116 | DIN962 | additional shapes and versions for bolts | ||
117 | DIN963 | ISO2009 | GB68-85 | slotted countersunk head screws |
118 | DIN964 | ISO2571 | GB69-85 | slotted raised countersunk oval head screws |
119 | DIN965 | ISO7046 | GB819-85 | cross recessed countersunk head screws |
120 | DIN966 | ISO7047 | GB820-85 | cross recessed raised countersunk head screws |
121 | DIN970 | hexagon nuts type-1 | ||
122 | DIN971 | hexagon nuts type-2 | ||
123 | DIN972 | ISO8674 | GB6176-86 | hexagon nuts with fine thread |
124 | DIN975 | GB15389-94 | threaded rods(studdings_ | |
125 | DIN976 | threaded pins(stud bolts) | ||
126 | DIN979 | hexagono thin slotted and castle nuts | ||
127 | DIN980 | ISO7199 | GB6184-86 | prevailling torque type hexagon nuts,all metall nuts |
128 | DIN981 | ISO2982 | GB812-88 | locknuts |
129 | DIN982 | ISO7040 | GB889.1-86 | prevailling torque type hexagon nuts,heavy type,with nylon insert |
130 | DIN985 | ISO1571 | GB6172.2-86 | prevailling torque type hexagon nuts,heavy type,with nyllon insert |
131 | DIN986 | prevailling torque typedomed capnuts with nylong insert | ||
132 | DIN988 | shim rings | ||
133 | DIN1052 | washers for timber connectors | ||
134 | DIN1151 | round plain head nails | ||
135 | DIN1440 | ISO8738 | plain washers for clevis pins(a) | |
136 | DIN1441 | plain washers for clevis pins | ||
137 | DIN1444 | ISO2341 | clevis pins with head | |
138 | DIN1471 | ISO8744 | GB/T13829.2 | grooved pins,taper grooved |
139 | DIN1472 | ISO8745 | GB/T13829.2 | grooved pins,taper grooved half length |
140 | DIN1473 | ISO8740 | grooved pins,parallel grooved full length | |
141 | DIN1474 | ISO8741 | grooved pins,reserve grooved half length | |
142 | DIN1475 | ISO8742 | grooved pins,centre grooved | |
143 | DIN1476 | ISO8746 | GB/T13829.3 | grooved pins with round head |
144 | DIN1477 | ISO8747 | grooved pins with countersunk head | |
145 | DIN1479 | turnuckles(centre parts),made out of hexagon bar | ||
146 | DIN1480 | turnuckles with eye bolt and hook bolt | ||
147 | DIN1481 | ISO8752 | GB879-86 | spring pins,heavy type |
148 | DIN1587 | GB802-88 | hexagon domed cap nuts | |
149 | DIN1804 | slotted round nuts for hook spanner | ||
150 | DIN1816 | round nuts with set holes | ||
151 | DIN2093 | disc springs | ||
152 | DIN3017 | hose clamps | ||
153 | DIN3404 | lubricating nipples,button head | ||
154 | DIN3567 | shackles for conduilts | ||
155 | DIN3570 | stirrup bolts(u-bolts) | ||
156 | DIN6319 | GB849-88 | spherical washers,conical seats | |
157 | DIN6325 | ISO8734 | parallel pins | |
158 | DIN6330 | GB56-88 | hexagon nuts,1.5d | |
159 | DIN6331 | GB6177-86 | hexagon nuts ,1.5d with collor | |
160 | DIN6334 | hexagon nuts,3d | ||
161 | DIN6797-a | GB862.1-87 | external teeth lock washers | |
162 | DIN6797-I | GB861.1-87 | internal teeth lock washers | |
163 | DIN6798-A | GB862.2-87 | external teeth serrated lock washers | |
164 | DIN6798-I | GB861.2-87 | internal teeth serrated lock washers | |
165 | DIN6799 | GB896-76 | retaining rings for shafts(e-rings),circlips | |
166 | DIN6885 | ISO773/2491 | parallel keys(forma) | |
167 | DIN6888 | ISO3912 | woodruff deys | |
168 | DIN6899 | thimbles | ||
169 | DIN6900 | GB9074.1-.17 | screws and washers assemblies | |
170 | DIN6901 | GB9074.18-.23 | tapping screws and washers assemblies | |
171 | DIN6912 | hexagon socket head cap screws with hole,low head | ||
172 | DIN6914 | hexagon head bolts with large head(friction grip bolts) | ||
173 | DIN6915 | hexagon nuts with large wideth across flat(friction grip nuts) | ||
174 | DIN6916 | round washers for friction grip bolts | ||
175 | DIN6917 | spuare taper washers for friction grip bolts on t-sections | ||
176 | DIN6923 | ISO4161 | GB6177-86 | hexagon flange nuts |
177 | DIN6925 | ISO7042 | GB6185.1-2000 | prevailing touque type hexagon nuts,all metallic nuts |
178 | DIN7337 | GB12617/12618 | blind rivets | |
179 | DIN7338 | GB875/975-86 | rivets for brake and clutch lining | |
180 | DIN7343 | ISO8750 | spiral pins | |
181 | DIN7346 | ISO13337 | spring pins,light type | |
182 | DIN7349 | washers for bolts with heavy type spring pins | ||
183 | DIN7500 | thread forming screws for iso-metric thread | ||
184 | DIN7504 | self-drilling tapping screws | ||
185 | DIN7513 | thread cutting screws | ||
186 | DIN7516 | thread cutting screws cross recess | ||
187 | DIN7965 | tee nuts with pronge | ||
188 | DIN7968 | GB1228/1229/1230 | hexagon head fitted bolts for steel structures | |
189 | DIN7971 | ISO1481 | GB5282-85 | pan head tapping screws with slot |
190 | DIN7972 | ISO1482 | GB5283-85 | countersunk flat head tapping screws with slot |
191 | DIN7973 | ISO1483 | GB5284-85 | raised countersunk oval head tapping screws with slot |
192 | DIN7976 | ISO1479 | GB5285-85 | hexagon tapping screws |
193 | DIN7980 | ISO8738 | spring lock washers for screws with cylindrical heads | |
194 | DIN7981 | ISO7049 | GB845-85 | pan head tapping screws with cross recessed |
195 | DIN7982 | ISO7050 | GB846-85 | countersunk flat head tapping screws with cross recessed |
196 | DIN7983 | ISO7051 | GB847-86 | raised countersunk oval head tapping screws with cross recessed |
197 | DIN7984 | hexagon scocket head cap screws with,reduced head | ||
198 | DIN7985 | ISO7045 | GB818-85 | pan head screws with cross recessed |
199 | DIN7989 | GB1230-84 | washers for steel structures | |
200 | DIN7990 | GB1229-84 | hexagon head bolts for steel structures | |
201 | DIN7991 | ISO10642 | hexagon socket countersunk head screws | |
202 | DIN7993 | GB895.2-86 | roundwire snap rings for shafts | |
203 | DIN7995 | BG952-86 | cross recessed raised countersunk head wood screws | |
204 | DIN7996 | BG950-86 | cross recessed round head wood screws | |
205 | DIN7997 | GB951-86 | cross recessed countersunk head wood screws | |
206 | DIN8140 | ciol inserts,coarse,fine thread,silf locking | ||
207 | DIN9571 | ISO7093 | GB96-85 | washers,outside diameter appro.3d |
208 | DIN11571 | spring cotter for a bolt | ||
209 | DIN13257 | belting bolts (elevator bolts) | ||
210 | DIN18182 | dry wall screws | ||
211 | DIN28129 | GB63-88 | lifting nuts(eye nuts) | |
212 | DIN7 0571 | GB858-88 | tab washers for slotted round nuts |
FAQ:
1) Q:What’s your product range?
A: Our product range includes screws, nuts, knobs, bolts, washers, rivet, anchor and CNC parts. We strictly implement various quality standards like GB, ISO, DIN, JIS, AISI NFE and BSW.Non-standard products also accepted.
2)Q:Are you a Trading company or a Manufacturer?
A: We are an Industry&Trade Company .
3) Q:Why should I choose you? What’s your advantages? Industries you are serving?
A: We are a professional manufacturer and have 9 years production and management experience in the field of fasteners .
We can provide our customers with a good solution in the area of production design, production process,packaging and after-sale service.Customer satisfaction is our sole pursuit.
4) Q:Which industry field are your product is suitable used in ?
A:Our products are widely use in machine assembling, electronics, constructional engineering furniture cabinets, etc.
Customer Service
· 1. Well trained and experienced staffs at your service.
· 2. Short lead time.
· 3. International standard matched
· 4. Non-standard / standard / OEM / ODM / customized service provided.
· 5. Small Quantity available.
· 6. Designed in accordance with customers’ request.
· 7. Packed and delivered by customers’ requirement.
Any more questions or demands, pls feel free to contact me!
Screw Shaft Types and Uses
Various uses for the screw shaft are numerous. Its major diameter is the most significant characteristic, while other aspects include material and function are important. Let us explore these topics in more detail. There are many different types of screw shafts, which include bronze, brass, titanium, and stainless steel. Read on to learn about the most common types. Listed below are some of the most common uses for a screw shaft. These include: C-clamps, screw jacks, vises, and more.
Major diameter of a screw shaft
A screw’s major diameter is measured in fractions of an inch. This measurement is commonly found on the screw label. A screw with a major diameter less than 1/4″ is labeled #0 to #14; those with a larger diameter are labeled fractions of an inch in a corresponding decimal scale. The length of a screw, also known as the shaft, is another measure used for the screw.
The major diameter of a screw shaft is the greater of its 2 outer diameters. When determining the major diameter of a screw, use a caliper, micrometer, or steel rule to make an accurate measurement. Generally, the first number in the thread designation refers to the major diameter. Therefore, if a screw has a thread of 1/2-10 Acme, the major diameter of the thread is.500 inches. The major diameter of the screw shaft will be smaller or larger than the original diameter, so it’s a good idea to measure the section of the screw that’s least used.
Another important measurement is the pitch. This measures the distance between 1 thread’s tip and the next thread’s corresponding point. Pitch is an important measurement because it refers to the distance a screw will advance in 1 turn. While lead and pitch are 2 separate concepts, they are often used interchangeably. As such, it’s important to know how to use them properly. This will make it easier to understand how to select the correct screw.
There are 3 different types of threads. The UTS and ISO metric threads are similar, but their common values for Dmaj and Pmaj are different. A screw’s major diameter is the largest diameter, while the minor diameter is the lowest. A nut’s major diameter, or the minor diameter, is also called the nut’s inside diameter. A bolt’s major diameter and minor diameter are measured with go/no-go gauges or by using an optical comparator.
The British Association and American Society of Mechanical Engineers standardized screw threads in the 1840s. A standard named “British Standard Whitworth” became a common standard for screw threads in the United States through the 1860s. In 1864, William Sellers proposed a new standard that simplified the Whitworth thread and had a 55 degree angle at the tip. Both standards were widely accepted. The major diameter of a screw shaft can vary from 1 manufacturer to another, so it’s important to know what size screw you’re looking for.
In addition to the thread angle, a screw’s major diameter determines the features it has and how it should be used. A screw’s point, or “thread”, is usually spiky and used to drill into an object. A flat tipped screw, on the other hand, is flat and requires a pre-drilled hole for installation. Finally, the diameter of a screw bolt is determined by the major and minor diameters.
Material of a screw shaft
A screw shaft is a piece of machine equipment used to move raw materials. The screw shaft typically comprises a raw material w. For a particular screw to function correctly, the raw material must be sized properly. In general, screw shafts should have an axial-direction length L equal to the moving amount k per 1/2 rotation of the screw. The screw shaft must also have a proper contact angle ph1 in order to prevent raw material from penetrating the screw shaft.
The material used for the shaft depends on its application. A screw with a ball bearing will work better with a steel shaft than 1 made of aluminum. Aluminum screw shafts are the most commonly used for this application. Other materials include titanium. Some manufacturers also prefer stainless steel. However, if you want a screw with a more modern appearance, a titanium shaft is the way to go. In addition to that, screws with a chromium finish have better wear resistance.
The material of a screw shaft is important for a variety of applications. It needs to have high precision threads and ridges to perform its function. Manufacturers often use high-precision CNC machines and lathes to create screw shafts. Different screw shafts can have varying sizes and shapes, and each 1 will have different applications. Listed below are the different materials used for screw shafts. If you’re looking for a high-quality screw shaft, you should shop around.
A lead screw has an inverse relationship between contact surface pressure and sliding velocity. For heavier axial loads, a reduced rotation speed is needed. This curve will vary depending on the material used for the screw shaft and its lubrication conditions. Another important factor is end fixity. The material of a screw shaft can be either fixed or free, so make sure to consider this factor when choosing the material of your screw. The latter can also influence the critical speed and rigidity of the screw.
A screw shaft’s major diameter is the distance between the outer edge of the thread and the inner smooth part. Screw shafts are typically between 2 and 16 millimeters in diameter. They feature a cylindrical shape, a pointy tip, and a wider head and drive than the former. There are 2 basic types of screw heads: threaded and non-threaded. These have different properties and purposes.
Lead screws are a cost-effective alternative to ball screws, and are used for low power and light to medium-duty applications. They offer some advantages, but are not recommended for continuous power transmission. But lead screws are often quieter and smaller, which make them useful for many applications. Besides, they are often used in a kinematic pair with a nut object. They are also used to position objects.
Function of a screw shaft
When choosing a screw for a linear motion system, there are many factors that should be considered, such as the position of the actuator and the screw and nut selection. Other considerations include the overall length of travel, the fastest move profile, the duty cycle, and the repeatability of the system. As a result, screw technology plays a critical role in the overall performance of a system. Here are the key factors to consider when choosing a screw.
Screws are designed with an external threading that digs out material from a surface or object. Not all screw shafts have complete threading, however. These are known as partially threaded screws. Fully threaded screws feature complete external threading on the shaft and a pointed tip. In addition to their use as fasteners, they can be used to secure and tighten many different types of objects and appliances.
Another factor to consider is axial force. The higher the force, the bigger the screw needs to be. Moreover, screws are similar to columns that are subject to both tension and compression loads. During the compression load, bowing or deflection is not desirable, so the integrity of the screw is important. So, consider the design considerations of your screw shaft and choose accordingly. You can also increase the torque by using different shaft sizes.
Shaft collars are also an important consideration. These are used to secure and position components on the shaft. They also act as stroke limiters and to retain sprocket hubs, bearings, and shaft protectors. They are available in several different styles. In addition to single and double split shaft collars, they can be threaded or set screw. To ensure that a screw collar will fit tightly to the shaft, the cap must not be overtightened.
Screws can be cylindrical or conical and vary in length and diameter. They feature a thread that mates with a complementary helix in the material being screwed into. A self-tapping screw will create a complementary helix during driving, creating a complementary helix that allows the screw to work with the material. A screw head is also an essential part of a screw, providing gripping power and compression to the screw.
A screw’s pitch and lead are also important parameters to consider. The pitch of the screw is the distance between the crests of the threads, which increases mechanical advantage. If the pitch is too small, vibrations will occur. If the pitch is too small, the screw may cause excessive wear and tear on the machine and void its intended purpose. The screw will be useless if it can’t be adjusted. And if it can’t fit a shaft with the required diameter, then it isn’t a good choice.
Despite being the most common type, there are various types of screws that differ in their functions. For example, a machine screw has a round head, while a truss head has a lower-profile dome. An oval-its point screw is a good choice for situations where the screw needs to be adjusted frequently. Another type is a soft nylon tip, which looks like a Half-dog point. It is used to grip textured or curved surfaces.