OIL–FREE SLIDE BLOCKS FOR BLOCK LOOSE CORE
OIL–FREE BUSHINGS FOR LOOSE CORE –SINTERED ALLOY / THIN TYPE / COPPER ALLOY STANDARD TYPE–
Part Number
Hole size (Recommended)
Thickness (N)
KPBZ (Sintered alloy/thin type)
SCK
d Tolerance Dr 6
R
L
Hole size (H7)
Type d
1 / 3 1 / 3 1 / 3
2 － C0 . 5
+ 0.049 + 0.038
+ 0.034 + 0.023
+ 0.018 0
12 20
12
16
2
16
G
1 . 6
25
1.0
+ 0.053 + 0.042
16
16
21
2.5
21
A ＋ 0 . 2 B ± 0 . 1 0
35
+ 0.041 + 0.028
+ 0.021 0
2 － R
KPBZ
G
1 . 6
30
+ 0.060 + 0.047
20
20
26
3
26
－ 0 . 03 － 0 . 05
※ d12 － L20
35
Introduction
1.5
3
L
+ 0.065 + 0.052
+ 0.050 + 0.034
+ 0.025 0
25 35
25
31
3
31
E Inclined pin tolerance: g6 M Material Sintered alloy
1 . 6
Hole size (Recommended) Screw plug Part Number
Thickness (N)
6 . 3
1 . 6
d F7
Dm 6
L
MPBZ (Copper alloy/standard type)
Type d
Hole size (H7)
(reference)
1 . 6
20 25
+ 0.018 + 0.007
+ 0.018 0
L
± 0 . 1
5
5
S
12
12
18
3
18
C0 . 3 － 0 . 5
1 － 2 . 5
Anti-rotation screw
+ 0.034 + 0.016
15 °
W ± 0 . 1
(Reference)
M4 × 8
20 25 30 35
A
16
3
22
16
22
+ 0.021 + 0.008
+ 0.021 0
30 35 40 35 40 50 40 50
MPBZ
20
28
4
28
20
1 . 6
M Material High strength brass casting Class 4 (CAC304) (Old JIS: HBsC4) Special solid lubricant embedded
a Accessories Dowel pin 1 pc.
M5 × 8
1 . 6
+ 0.041 + 0.020
－ 0 . 1 － 0 . 3
A part details (both side)
L
25
4
33
25
33
+ 0.025 + 0.009
+ 0.025 0
Part Number
10 °
A 1mm increments
B
S
L
a Accessories
M6 × 16
30
30
38
4
38
Type
W 29 34 49
E Inclined pin tolerance: g6 M Material High tensile brass alloy Solid lubricant embedded
0 － 4
3–10 3–15 3–25
20 25 40
5 5
30 40 40
MS8 – 20 MS8 – 25 MS8 – 40
SCK
Part Number – L KPBZ20 – 30 MPBZ16 – 20
Inclined pin guide bush
10
Example
Order
Inclined pin
D P.613
Part Num ber – A SCK34 – 10
Order
Quotation
Delivery
Slide unit
Quotation
Delivery
(1) Insert the slide block between the top and bottom ejector plates. (2) Fix the block loose core with the supplied φ 8 dowel pin.
Example
Square loose core
• Mold closed
• Mold opened
• Burning alloy structure
• Testing conditions Testing machine : reciprocation testing machine Bushing : d20–D28 Side pressure: 120N/mm 2 (12kgf/mm 2 ) Speed: 30m/min (300spm) Stroke amount: 50mm Lubrication: spreading initial simple grease
■ Features and scope of use ＊ Can also be used in an oil–free condition, but even better performance can be obtained by using running–in grease or oil. KPBZ (Sintered alloy/thin type) MPBZ (Copper alloy/standard type)
0 . 1 － 0 . 3
Special alloy
Knock pin
Graphite
• Solid lubricant consisting mainly of graphite is finely dispersed through the sintered alloy, and the pores are impregnated with lubricating oil. • Has excellent coefficient of friction and wear resistance. The amount of oil impregnation is a high value of about 16%, ensuring stable performance over a long period. • There is no limit on the sliding direction. Because the solid lubricant is dispersed, the bushing can be adapted for short strokes, and can also be used for reciprocating motion, rocking and rotary motion as well.
• Solid lubricant is embedded in a base body of high strength brass.
Ejector plate Top side
Vacancy (Impregnated oil)
• Exhibits high performance under high load and low–speed operation conditions.
100
Characteristics
（ W ＋ 1 ） Counterbore width
Made by other companies
Comparative abrasion quantity
mm/ （ N/mm 2 ・ m/s ・ hr ）
Product name Copper alloy graphite embedded oil-free bush Sintered alloy oil-free bush
φ 20
Made by other companies
• Can be used for reciprocating motion, rocking motion, frequent starting and stopping, etc.
23 . 19 × 10 3 . 95 × 10
Ejector plate bottom side
－ 4
Copper alloy graphite embedded
80
－ 4
KPBZ
60
Regular lubrication
Lubrication condition Possible temperature of use Allowable max. speed V Allowable max. load P
Lubrication–free
Lubrication–free
40
–40–120°C
–40–200°C
–40–150°C
KPBZ20
Copper alloy graphite embedded oil-free bush
60 m/min
30 m/min
60 m/min
20
2900 N/cm 2 (296 kgf/cm 2 ) 9800 N/cm 2 ・ m/min (1000 kgf/cm 2 ・ m/min)
2900 N/cm 2 (296 kgf/cm 2 )
9900 N/cm 2 ・ m/min (1010 kgf/cm 2 ・ m/min)
19515 N/cm 2 m ・ min (1990 kgf/cm 2 ・ m/min)
Allowable max. PV value
619
620
0
5
10
15
20
25
30
Hardness
90HRM(JIS Z2245)
HB210(JIS Z2243,2245)
Endurance time (hr) Transition of bearing temperature against different materials
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