ALTERATION GUIDE FOR STRAIGHT CORE PINS
Applicable Products
Applicable Products
Items
Code
Specifications
Items
Code
Specifications
Alterations
Alterations
Reduces the head diameter. Range of designation D or P ≦ HC ＜ H and D or P ≧ 0.3 Unit of designation 0.1mm increments Designation method HC6.5 E In relation to the head diameter tolerance, alteration may create a straight piece with little diameter difference between the head and shaft.
Head diameter change
Flat cutting
Single flat cutting Range of designation (D or P)/2 ≦ KC ＜ H/2 D or P ≧ 0.6
HC
KC
When the key flat size is (shaft diameter/2)
－ 0.01 KC 0
Head diameter change (precision)
Reduces the head diameter. (Precision) Range of designation(D or P) + 0.5 ≦ HCC ＜ H － 0.3 and D or P ≧ 0.6 Unit of designation 0.1mm increments Designation method HCC6.1 E D or P ≧ 0.6
Flat cutting
Two parallel flats cutting Range of designation (D or P)/2 ≦ WKC ＜ H/2 D or P ≧ 0.6
HCC
WKC
KC
－ 0.01 0
Unit of designation Shaft diameter selection type (D/2) ……………………………………… 0.05 mm increments possible Shaft diameter designation (0.01 mm increments) type (P/2) …………………………………… 0.005 mm increments possible Shaft diameter designation (0.005 mm increments) type (P/2) …………………………………… 0.0025 mm increments possible Shaft diameter designation (0.001 mm increments) type (P/2) …………………………………… 0.0005 mm increments possible
WKC
Head diameter change
Reduces the head thickness. Range of designation Right table Unit of designation 0.1mm increments Designation method TC3.5
D or P
TC
0.8 or less 2.0 ≦ TC ＜ 4.0 0.8 or more 1.5 ≦ TC ＜ 4.0(Head thickness JIS T/2 ≦ TC ＜ T) E Dimensions L and F remain unchanged.
TC
Varied width two parallel flats cutting Range of designation
Flat cutting
0
－ 0.02
TC
KAC KBC
(D or P)/2 ≦ KAC KAC ＜ KBC ＜ H/2 D or P ≧ 0.6
T
Head relief processing
－ 0.01 0
KBC － 0.01 0
KAC
Adds a relief under the head, making the plate chamfering unnecessary. D or P ≧ 0.6 Designation method TRN E D or P ≧ 0.6 Numbering on the head Electrolytic marking of ID code on the head. (in 1.8 point, Round Gothic type) Available characters 10 types of numerals: 0–9; 26 types of alphabets: A–Z Range of designation 1 character when 2 ≦ H ≦ 4.9
TRN
Flat cutting
Designation method • KC2.61
(When P5.22) (When P6.175) (When P5.483)
Right angled two flats cutting Range of designation (D or P)/2 ≦ RKC ＜ H/2 D or P ≧ 0.6
• WKC3.0875 • RKC2.7415
RKC
• DKC3
(When D6)
－ 0.01 0
• SKC2.5 (When D5) • KGC1.5–AG125 (When D3) • KTC3.085 (When P6.17)
RKC
Flat cutting
Numbering at the back part of the head
1 or 2 characters when 5 ≦ H ≦ 6.9 (Only the first character may be an alphabet.) Up to 3 characters when 7 ≦ H (Only the first character may be an alphabet.) E Number–marking may not be possible depending on the specified characters when the space indicated in the table below does not exist on the head.
Three flats cutting Range of designation (D or P)/2 ≦ DKC ＜ H/2 D or P ≧ 0.6
DKC
NHC
A15
To designate an arbitrary flat size
Unit: mm Character Height Character Width
0
DKC － 0.01
DKC
8
1 characters 2 characters 3 characters
2.3 2.3 2.3
2.7 5.0 7.3
Flat cutting
Four flats cutting Range of designation (D or P)/2 ≦ SKC ＜ H/2 D or P ≧ 0.6
Designation method NHC–6, NHC–23, NHC–A90 E Available when head diameter H ≧ 2 X Combination with SKC not available X NHC is not available when numbering space in head exceeds the maximum of 1.8 long x 1.8 wide x characters. Automatic sequential numbering on the head Adds a sequential number on the head of each core pin when two or more pieces of identical size are ordered. Available characters Same as NHC (see above) Range of designation Same as NHC (see above) Designation method When 3 pieces are ordered with NHN–1, a sequential number starting from 1 is added on the head of each piece. When 10 pieces are ordered with NHN–A15: A sequential number starting from A15 (through A24) is added on the head of each piece. E Only available when two or more pieces of an identical size are ordered. E Available when head diameter H ≧ 2 X Combination with SKC not available X NHC is not available when numbering space in head exceeds the maximum of 1.8 long x 1.8 wide x characters.
SKC
KC
SKC － 0.01 0
Unit of designation
0.1mm increments
Numbering at the back part of the head
Adds a flat at the reference plane (0°), and another at the designated angle from there.
Flat cutting (angled)
Designation method • KC1.4 • WKC2.3
AG °
± 0.5
Range of designation (D or P)/2 ≦ KGC ＜ H/2 D or P ≧ 0.6 AG = 1° increments 0 ＜ AG ＜ 360
KGC
• KAC1.4–KBC1.6 • RKC1.4 • DKC1.75 • SKC5.8 • KGC1.4–AG85 • KTC2.3
0 °
1
2
3
NHN
KGC
The tolerance of the flat cutting width is . 0 –0.01
A1
A2
A3
Flat cutting (angled)
120 ° 120 °
Three flats cutting at 120°. Range of designation (D or P)/2 ≦ KTC ＜ H/2, D or P ≧ 0.6
120 °
KTC
C C chamfer tolerance alteration
0
Core pins with tip process Shape C Core pins with tip process Shape R Core pins with tip process Shape B
－ 0.01 KTC
The tip C chamfering tolerance ± 0.05 can be changed to ± 0.02. Range of designation 0.1 ＜ CKC ≦ {(D or P) － 0.2}/2 ， L–CKC ≧ 9.5 Unit of designation 0.05mm increments Designation method CKC0.95 E Available for Standard type The tip R chamfering tolerance ± 0.1 can be changed to ± 0.05. Range of designation 0.2 ＜ RTC ≦ {(D or P)–0.2}/2, L–RTC ≧ 10 Unit of designation 0.1mm increments Designation method RTC0.6 E Available for Standard type
CKC
Flat cutting (angled)
90 °
Changes the flat position (standard: 0°) clockwise in 1° increments. Range of designation 0 ＜ AKC ＜ 360 Unit of designation 1° increments Designation method θ= 45° c AKC45 E No need to designate AKC0
180 °
θ 0 °
0 °
AKC
Straight Core Pins with engraving
Tip R tolerance alteration
R
（ D or P ） /2
270 °
RTC
Flat cutting (angled)
Adds two flats at the standard (0°) position, or at the designated angle (clockwise in 1° increments from the standard position).
90 °
Refer to P.355
180 °
90 °
Allows designation of the radius of spherical shape processing (SR) at a value larger than a half of the shaft diameter. Range of designation (D or P)/2 ＜ 4 …… (D or P)/2 ≦ RC ≦ 1.5 × (D or P) (D or P)/2 ≧ 4 …… (D or P)/2 ≦ RC ≦ 3 × (D or P)and RC ≦ 32 Unit of designation 0.1mm increments Designation method RC0.6 E Available for Standard type
0 ° θ 0 °
0 °
Expansion of SR
AWC
Range of designation 0 ≦ AWC ＜ 360 Unit of designation 1° increments Designation method θ= 0° c AWC0, θ＝ 60° c AWC60
θ
0 °
180 °
RC
DorP/2
（ D or P ） /2
270 °
270
Full length tolerance alteration
2 － R ≦ 0.2 Gas vent machining
L dimension tolerance + 0.005 0 Unit of designation L designation in 0.005mm increments possible E Available when 1.5 ≦ (D or P) ≦ 5 Designation method LKC Straight core pins with Tip Process … E Available when Shape C/T/R + 0.01 0 can be changed to
Gas vent machining
D or P
t
Extra precision with engraving
E Available when D or P ≧ 2 Range of designation 2 + ℓ ≦ GS ≦ 10, GS + 2 ≦ GB ≦ 30
LKC
2.00– 4.99 5.00– 9.99
0.1 0.2 0.3
GVC
Unit of designation 1mm increments Designation method GVC–GS3–GB20 E L–GB ≧ 10 ℓ varies depending on the shape. Refer to the catalog page of each product. 10.00–20.00
Full length alteration
GS
L
Change shaft
L GB
E Note that designating (H/2–0.15) or more for key flat cutting alteration will create hardly any flat on the head.
323
324
on D P.358
E When you change the engraving depth of straight core pins with engraving, refer to EC code
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