Percussion drilling is employed when auger or wash boring is not possible in very stiff soil or rock. It also can be used in most soil types.
Here the advancement of a hole is achieved by alternatively lifting and dropping a heavy cutting or hammering bit that is attached to a rope or cable that is lowered into an open hole or inside a temporary casing (casings are hollow cylindrical pipes used for borehole stability and to prevent the loss of drilling fluid through the boreholes).
Usually a tripod is used to support the cable. The stroke of bit varies according to the ground condition. The major disadvantage of this method is that it is not possible to get good-quality undisturbed samples. In very hard rock (and especially fractured hard rock), down-the-hole (DTH) drilling can be employed. In this case the hammer, applying repeated percussive pressure, is located just behind the drill bit inside the hole, unlike the open percussion drilling, where the hammer is on top of the drilling string.
The drilling string provides the necessary force and rotation to the hammer and bit, as well as compressed air or fluids to the hammer and for the flushing of cuttings.
This arrangement also allows for much deeper percussion drilling. However, the DTH drills are typically more expensive.
Percussion Drilling Rig,Cable Percussion Drilling,Percussion Drilling Equipment,Deep Foundation Engineering Percussion Rig Henan YK Prospecting Machinery Co., Ltd , https://www.yyboreholedrilling.com
2.high precision
3.competitive price
4.high quality
5.good service
Packaging & Delivery
Packaging Details:Neutral Packing: White Plastic bag / Outer Carton / Pallet, LYAZ Brand packing: LYAZ Plastic bag/LYAZ outer carton / Pallet, Outer Carton Size:39.5cm*26cm*21.5cm or 39.5cm*26cm*17cm, Pallet Size:80cm*120cm*80cmor 120cm*80cm*100cm.
Delivery Detail:
3Â days after received deposit
Parameters of thrust roller bearing
Brand
LYAZ or OEM
Name
Thrust roller bearing
All model
292*** 293*** 294***
Material
GCr15SiMn, GCr15, G20Cr2Ni4A,9Cr18
Certificate
ISO9001:2008
Precision
P0, P6, P5, P4, P2
ID Size
60mm-900mm
Clearance
C0,C1,C2,C3,C4,C5 etc.
Seals type
RS, 2RS, R2, Z, 2Z, 2RZ etc
Basic Rated Load (KN)
A. Dynamic:
328-13855
B. Static:
897-67595
Limit Speed(r/min)
A. Grease
Â
B. Oil
2400-170
Features
Low price,high speed,long life
Application
widely used in automobile, electrical equipment, instrument, building machinery, rolling stock agricultural machinery and various specialized machineries,machine spindle application and are used for cool and hot mills.
Delivery Time
2-5 days
Package
card board package, pallet, wooden case or according to the requirement of the customers
Price
FOB,CIF
Â
designation
Dimensions
Mass
Â
d (mm)
D (mm)
H (mm)
kg
29422
110
230
73
33.4
29424
120
250
78
18.5
29326
130
225
58
9.8
29426
130
270
85
23.9
29330
150
250
60
12.5
29430
150
300
90
29.3
29334
170
280
67
16.5
29434
170
340
103
42.4
29338EJ
190
320
78
25.6
29438EJ
190
380
115
60.3
29340
200
340
85
29
29440
200
400
122
69.8
29344
220
360
85
33.9
29444
220
420
122
73.9
29348
240
380
85
41.9
29448EM
240
440
122
78
29352
260
420
95
51.2
29452
260
480
132
103
29360
300
480
109
76.6
29460
300
540
145
136
29364
320
500
109
79.8
29468
340
620
170
220
29372
360
560
122
113
29476
380
670
175
261
29576
380
820
265
824
29380
400
620
132
165
29284EM
420
580
95
70
29388
440
680
145
180
29488
440
780
206
411
29392
460
710
150
220
29496EM
480
850
224
550
294/500
500
870
224
560
293/530
530
800
160
288
293/600
600
900
180
635
294/630
630
1090
280
1170
Product Details Â
The bearing Type
Specifications
Cage Material
New model
Old model
d*D*B(mm)
51100
8100
10*24*9
Steel
51101
8101
12*26*9
Steel
51102
8102
15*28*9
Steel
517/15.2ZHV
98102
15.2*30.4*10
Steel
51103
8103
17*30*9
Steel
51104
8104
20*35*10
Steel
51105
8105
25*42*11
Steel
51106
8106
30*47*11
Steel
51107
8107
35*52*12
Steel
KOW51107
108107
35*55
Steel
51108
8108
40*60*13
Steel
51109
8109
45*65*14
Steel
KOW51109
108109
Â
Steel
LIW51109
208109
45*65*10.57
Steel
51110
8110
50*70*14
Steel
51111
8111
55*78*16
Steel
51112
8112
60*85*17
Steel
51113
8113
65*90*17
Steel
51114
8114
70*95*18
Steel
51115
8115
75*110*19
Steel
51116
8116
80*105*19
Steel
51117
8117
85*110*19
Steel
51118
8118
90*120*22
Steel
51119
8119
Â
Steel
51120
8120
100*130*25
Steel
51122
8122
110*145*25
Steel
51124
8124
120*155*25
Steel
51126
8126
130*170*30
Steel
51128
8128
140*180*31
Steel
51128M
8128H
140*180*31
Brass
SPECIFICATION
Model
Old No.
Dimension (mm)
Cr
Cor
Limiting Speed(r/min)
Weight
d
D
H
kN
kN
Grease
Oil
kg
51200
8200
10
26
11
12.7
17.1
5700
8800
0.03
51201
8201
12
28
11
13.2
19
5400
8300
0.034
51202
8202
15
32
12
16.6
24.8
4900
7500
0.046
51203
8203
17
35
12
17.2
27.3
4900
7500
0.053
51204
8204
20
40
14
22.3
37.7
3900
6000
0.082
51205
8205
25
47
15
27.8
50.4
3600
5500
0.12
51206
8206
30
52
16
29.3
58.2
3400
5200
0.15
51207
8207
35
62
18
39.2
78.2
2900
4500
0.22
51208
8208
40
68
19
46.9
98.3
2700
4200
0.27
51209
8209
45
73
20
47.7
105
2600
4000
0.32
51210
8210
50
78
22
48.5
111
2300
3600
0.39
51211
8211
55
90
25
69.4
159
2100
3200
0.61
51212
8212
60
95
26
73.6
179
1900
3000
0.69
51213
8213
65
100
27
74.8
189
1900
2900
0.77
51214
8214
70
105
27
73.6
189
1800
2800
0.81
51215
8215
75
110
27
77.4
209
1800
2700
0.86
51216
8216
80
115
28
78.5
218
1700
2600
0.95
51217
8217
85
125
31
92.3
251
1500
2300
1.29
51218
8218
90
135
35
117
326
1400
2100
1.77
51220
8220
100
150
38
147
410
1200
1900
2.36
51222
8222
110
160
38
148
431
1200
1800
2.57
51224
8224
120
170
39
154
172
1100
1700
2.86
51226
8226
130
190
45
203
622
970
1500
4.09
51228
8228
140
200
46
215
669
940
1450
4.46
51230
8230
150
215
50
244
768
840
1300
5.64
51232
8232
160
225
51
247
803
810
1250
6.53
51234
8234
170
240
55
268
874
750
1150
8.12
51236
806
180
250
56
294
986
710
1100
8.68
51238
8238
190
270
62
298
1010
650
1000
11.7
Â
Don,t strike the bearing when installing the bearing to shaft or bearing house.
Discuss for chemical compatibility when used on strong acid chemical environment.
Â
LYAZ Advantage
 SOLUTION
- At the beginning, we will have a communication with our customers on their demand, then our  engineers will work out an optimum solution based on the customers' demand and condition.
PRODUCTION
- Running in accordance with ISO 9001 quality system, the advanced production equipments, Â sophisticated processing technology, strict quality management system, skilled workers and innovative technical team, make our bearings in continuous quality improvement & technology development.
QUALITY CONTROLÂ (Q/C)
- In accordance with ISO standards, we have professional Q/C staff, precision testing instruments and internal inspection system, the quality control is implemented in every process from material receiving to products packaging to ensure our bearings quality.
PACKAGE
- Standardized export packing and environment-protected packing material are used for our bearings, the custom boxes, labels, barcodes etc. can also be provided according to our customer's request.
LOGISTIC
 - Normally, our bearings will be sent to the customers by ocean transportation due to its heavy weight, airfreight, express is also available if our customers need.
WARRANTY
- We warrant our bearings to be free from defects in material and workmanship for a 12 months period from the shipping date, this warranty is voided by non-recommended use, improper installation or physical damage.Â
A
LYAZ Leading Products:
1) Taper roller bearings (Inch;Single Row;Double rows).
2) Deep groove ball bearings(Gcr15 Carbon Z 2Z RS 2RS) .
3) Pillow Block Bearings and seats(UCP UCF UCFL UCT).
4) Wheel hub bearing.
Wafang Dian Bearing Advantage
1) Material Advantage
All the material for Wafang Dian bearing are from the best suppliers in China.
2) Processing Advantage
we can guarantee the time spent and quality of every processing. We can do three times tempering to stabilize the dimensions of the bearings, which is quite different from other bearings manufacturers.Â
3) Quality control advantage
All the bearing parts are 100% strictly inspected before and during production including Metallurgical testing, crack detection, roundness, hardness, roughness and g++eometric dimensions. Â Â Â Â Â
4) All of bearings meet the ISO international standard.
5) Appearance Technology Advantage
we can provide light chamfer, black chamfer, black chamfer of the rollers. The bearings are produced all according to customer's requirements.
6) Service Advantage
Your satisfaction is our biggest goal. From quotation to the final packing and transport, we provide the quickest and most satisfactory services to every customer.
Â
Company information
Our factory has been founded for around 30 years, We are a professional manufacturer of ball bearings and roller bearings, including deep groove ball bearing, self-aligning bearing, cylindrical roller bearing, tapered roller bearings, with our good team work and hard working of skillful staffs and our professional engineers, we got very good reputation in the world market, especially in Mid-eastern countries. Thanks for every customer's support and trust, our company hope to establish mutual benefit and development business relations with you!
Â
If you are interested in our products  deep groove ball bearing, welcome to contact us for more detailed information,
Your inquiry related to our product & price will be replied within 24hours
Well-trained & experienced staff are to answer all your inquiries.
OEM & ODM projects are highly welcomed. We have strong R&M team here to help.
Free samples available
The professional Logistic Center service
Technical support after sale
Any other reasonable requirements.
We participate Canton Fair,Shanghai Auto Mechanika Fair,Professional Auto Parts Fair annually.
Â
Welcome Inquiry and order !
Thank you!
1.free sample
2.high precision
3.competitive price
4.high quality
5.good service
Packaging & Delivery
Packaging Details:Neutral Packing: White Plastic bag / Outer Carton / Pallet, LYAZ Brand packing: LYAZ Plastic bag/LYAZ outer carton / Pallet, Outer Carton Size:39.5cm*26cm*21.5cm or 39.5cm*26cm*17cm, Pallet Size:80cm*120cm*80cmor 120cm*80cm*100cm.
Delivery Detail:
3Â days after received deposit
Parameters of thrust roller bearing
Brand
LYAZ or OEM
Name
Thrust roller bearing
All model
292*** 293*** 294***
Material
GCr15SiMn, GCr15, G20Cr2Ni4A,9Cr18
Certificate
ISO9001:2008
Precision
P0, P6, P5, P4, P2
ID Size
60mm-900mm
Clearance
C0,C1,C2,C3,C4,C5 etc.
Seals type
RS, 2RS, R2, Z, 2Z, 2RZ etc
Basic Rated Load (KN)
A. Dynamic:
328-13855
B. Static:
897-67595
Limit Speed(r/min)
A. Grease
Â
B. Oil
2400-170
Features
Low price,high speed,long life
Application
widely used in automobile, electrical equipment, instrument, building machinery, rolling stock agricultural machinery and various specialized machineries,machine spindle application and are used for cool and hot mills.
Delivery Time
2-5 days
Package
card board package, pallet, wooden case or according to the requirement of the customers
Price
FOB,CIF
Â
designation
Dimensions
Mass
Â
d (mm)
D (mm)
H (mm)
kg
29422
110
230
73
33.4
29424
120
250
78
18.5
29326
130
225
58
9.8
29426
130
270
85
23.9
29330
150
250
60
12.5
29430
150
300
90
29.3
29334
170
280
67
16.5
29434
170
340
103
42.4
29338EJ
190
320
78
25.6
29438EJ
190
380
115
60.3
29340
200
340
85
29
29440
200
400
122
69.8
29344
220
360
85
33.9
29444
220
420
122
73.9
29348
240
380
85
41.9
29448EM
240
440
122
78
29352
260
420
95
51.2
29452
260
480
132
103
29360
300
480
109
76.6
29460
300
540
145
136
29364
320
500
109
79.8
29468
340
620
170
220
29372
360
560
122
113
29476
380
670
175
261
29576
380
820
265
824
29380
400
620
132
165
29284EM
420
580
95
70
29388
440
680
145
180
29488
440
780
206
411
29392
460
710
150
220
29496EM
480
850
224
550
294/500
500
870
224
560
293/530
530
800
160
288
293/600
600
900
180
635
294/630
630
1090
280
1170
Product Details Â
The bearing Type
Specifications
Cage Material
New model
Old model
d*D*B(mm)
51100
8100
10*24*9
Steel
51101
8101
12*26*9
Steel
51102
8102
15*28*9
Steel
517/15.2ZHV
98102
15.2*30.4*10
Steel
51103
8103
17*30*9
Steel
51104
8104
20*35*10
Steel
51105
8105
25*42*11
Steel
51106
8106
30*47*11
Steel
51107
8107
35*52*12
Steel
KOW51107
108107
35*55
Steel
51108
8108
40*60*13
Steel
51109
8109
45*65*14
Steel
KOW51109
108109
Â
Steel
LIW51109
208109
45*65*10.57
Steel
51110
8110
50*70*14
Steel
51111
8111
55*78*16
Steel
51112
8112
60*85*17
Steel
51113
8113
65*90*17
Steel
51114
8114
70*95*18
Steel
51115
8115
75*110*19
Steel
51116
8116
80*105*19
Steel
51117
8117
85*110*19
Steel
51118
8118
90*120*22
Steel
51119
8119
Â
Steel
51120
8120
100*130*25
Steel
51122
8122
110*145*25
Steel
51124
8124
120*155*25
Steel
51126
8126
130*170*30
Steel
51128
8128
140*180*31
Steel
51128M
8128H
140*180*31
Brass
SPECIFICATION
Model
Old No.
Dimension (mm)
Cr
Cor
Limiting Speed(r/min)
Weight
d
D
H
kN
kN
Grease
Oil
kg
51200
8200
10
26
11
12.7
17.1
5700
8800
0.03
51201
8201
12
28
11
13.2
19
5400
8300
0.034
51202
8202
15
32
12
16.6
24.8
4900
7500
0.046
51203
8203
17
35
12
17.2
27.3
4900
7500
0.053
51204
8204
20
40
14
22.3
37.7
3900
6000
0.082
51205
8205
25
47
15
27.8
50.4
3600
5500
0.12
51206
8206
30
52
16
29.3
58.2
3400
5200
0.15
51207
8207
35
62
18
39.2
78.2
2900
4500
0.22
51208
8208
40
68
19
46.9
98.3
2700
4200
0.27
51209
8209
45
73
20
47.7
105
2600
4000
0.32
51210
8210
50
78
22
48.5
111
2300
3600
0.39
51211
8211
55
90
25
69.4
159
2100
3200
0.61
51212
8212
60
95
26
73.6
179
1900
3000
0.69
51213
8213
65
100
27
74.8
189
1900
2900
0.77
51214
8214
70
105
27
73.6
189
1800
2800
0.81
51215
8215
75
110
27
77.4
209
1800
2700
0.86
51216
8216
80
115
28
78.5
218
1700
2600
0.95
51217
8217
85
125
31
92.3
251
1500
2300
1.29
51218
8218
90
135
35
117
326
1400
2100
1.77
51220
8220
100
150
38
147
410
1200
1900
2.36
51222
8222
110
160
38
148
431
1200
1800
2.57
51224
8224
120
170
39
154
172
1100
1700
2.86
51226
8226
130
190
45
203
622
970
1500
4.09
51228
8228
140
200
46
215
669
940
1450
4.46
51230
8230
150
215
50
244
768
840
1300
5.64
51232
8232
160
225
51
247
803
810
1250
6.53
51234
8234
170
240
55
268
874
750
1150
8.12
51236
806
180
250
56
294
986
710
1100
8.68
51238
8238
190
270
62
298
1010
650
1000
11.7
Â
Don,t strike the bearing when installing the bearing to shaft or bearing house.
Discuss for chemical compatibility when used on strong acid chemical environment.
Â
LYAZ Advantage
 SOLUTION
- At the beginning, we will have a communication with our customers on their demand, then our  engineers will work out an optimum solution based on the customers' demand and condition.
PRODUCTION
- Running in accordance with ISO 9001 quality system, the advanced production equipments, Â sophisticated processing technology, strict quality management system, skilled workers and innovative technical team, make our bearings in continuous quality improvement & technology development.
QUALITY CONTROLÂ (Q/C)
- In accordance with ISO standards, we have professional Q/C staff, precision testing instruments and internal inspection system, the quality control is implemented in every process from material receiving to products packaging to ensure our bearings quality.
PACKAGE
- Standardized export packing and environment-protected packing material are used for our bearings, the custom boxes, labels, barcodes etc. can also be provided according to our customer's request.
LOGISTIC
 - Normally, our bearings will be sent to the customers by ocean transportation due to its heavy weight, airfreight, express is also available if our customers need.
WARRANTY
- We warrant our bearings to be free from defects in material and workmanship for a 12 months period from the shipping date, this warranty is voided by non-recommended use, improper installation or physical damage.Â
A
LYAZ Leading Products:
1) Taper roller bearings (Inch;Single Row;Double rows).
2) Deep groove ball bearings(Gcr15 Carbon Z 2Z RS 2RS) .
3) Pillow Block Bearings and seats(UCP UCF UCFL UCT).
4) Wheel hub bearing.
Wafang Dian Bearing Advantage
1) Material Advantage
All the material for Wafang Dian bearing are from the best suppliers in China.
2) Processing Advantage
we can guarantee the time spent and quality of every processing. We can do three times tempering to stabilize the dimensions of the bearings, which is quite different from other bearings manufacturers.Â
3) Quality control advantage
All the bearing parts are 100% strictly inspected before and during production including Metallurgical testing, crack detection, roundness, hardness, roughness and g++eometric dimensions. Â Â Â Â Â
4) All of bearings meet the ISO international standard.
5) Appearance Technology Advantage
we can provide light chamfer, black chamfer, black chamfer of the rollers. The bearings are produced all according to customer's requirements.
6) Service Advantage
Your satisfaction is our biggest goal. From quotation to the final packing and transport, we provide the quickest and most satisfactory services to every customer.
Â
Company information
Our factory has been founded for around 30 years, We are a professional manufacturer of ball bearings and roller bearings, including deep groove ball bearing, self-aligning bearing, cylindrical roller bearing, tapered roller bearings, with our good team work and hard working of skillful staffs and our professional engineers, we got very good reputation in the world market, especially in Mid-eastern countries. Thanks for every customer's support and trust, our company hope to establish mutual benefit and development business relations with you!
Â
If you are interested in our products  deep groove ball bearing, welcome to contact us for more detailed information,
Your inquiry related to our product & price will be replied within 24hours
Well-trained & experienced staff are to answer all your inquiries.
OEM & ODM projects are highly welcomed. We have strong R&M team here to help.
Free samples available
The professional Logistic Center service
Technical support after sale
Any other reasonable requirements.
We participate Canton Fair,Shanghai Auto Mechanika Fair,Professional Auto Parts Fair annually.
Â
Welcome Inquiry and order !
Thank you!
China Maufacturer Mini Tractor NTN Thrust Roller Bearing 29430
Model NO.: 29430
Separated: Unseparated
Brand Name: Lyaz or OEM
Packaging Details: Neutral Packing or Our Own Brand Packing
MOQ: 1PC
Guarantee: One Year
Clearance: C2,C3,C4,C5
Hardness: HRC60-65
Number of Row: Single/Double/Multi Row
Circle&Roller Material: Gcr15
Cage Material: Brass,Steel
OEM: Available
Trademark: LYAZ or OEM
Transport Package: Lyaz Standard Export Carton
Specification: p5, z1, z2, z3, z4, z5
Origin: Dalian Wafangdian
HS Code: 8482200000
Model NO.: 29430
Separated: Unseparated
Brand Name: Lyaz or OEM
Packaging Details: Neutral Packing or Our Own Brand Packing
MOQ: 1PC
Guarantee: One Year
Clearance: C2,C3,C4,C5
Hardness: HRC60-65
Number of Row: Single/Double/Multi Row
Circle&Roller Material: Gcr15
Cage Material: Brass,Steel
OEM: Available
Trademark: LYAZ or OEM
Transport Package: Lyaz Standard Export Carton
Specification: p5, z1, z2, z3, z4, z5
Origin: Dalian Wafangdian
HS Code: 8482200000
1.free sample