21.Mar..2010
KRGF1-1000 |
The height - changed
from 20mm → to 15mm
|
29.Dec..2009
|
Bore Size is changed from H7 to H8.
Products with Bore Size : Less than φ4, or φ5, or φ6, and if the bore length is 3 times larger than the bore diameter.
|
21.Dec.2009
All Worm Wheel products. |
The overall lenght tolerance - changed
Incorrect
Correct
 |
21.Oct.2009
All 10 items of KRHG products with total length 100.
All 4 items of SRH products with total length 100
|
The shapes - changed
The shape is changed as bellow.
Changed to as below
The figures are for SRH products with right helix.
|
21.April.2009
All NSU Spur Gears
|
Change in material
|
1.April.2009
[ SS Spur Gears ]
SS2-12J10 , SS2-13J12
SS2.5-13J14 , SS2.5-13J15
SS2.5-15J18,
SS3-12J15
SS3-12J16 , SS3-13J18
SS3-14J19
[ SSG Spur Gears ]
SSG1.5-14J10 , SSG2.5-15J18
SSG3-14J19 , SSG3-14J20
|
Keyway processing is stopped to apply. Only tapping is applied for shaft-fastening.
|
20.March.2009
SS Spur Gears
All 49 items with module 1
SSA Spur Gears
All 18 items with module 1
SSY Spur Gears
All 17 items with module 1
SSAY Spur Gears
All 17 items with module 1
SSAY/K Spur Gears
All 39 items with module 1
SUS Spur Gears
All 23 items with module 1
|
Change in tooth thinning (Backlash)
Backlash of all the products are from 0.08 to0.18 |
24.Feb.2009
All items of DS products
|
Change in specification : Bore tolerance
-0.05 to -0.1 Changed to: -0.05 to -0.30 |
24.Feb.2009
All items of DS products
|
Change in tooth thinning (Backlash)
Backlashes of DS0.5 products are uniformly
from 0.05 to 0.30
Backlashes of DS0.8 products are uniformly
from 0.08 to 0.48
Backlashes of DS1 products are uniformly
from 0.10 to 0.60 |
12.Feb.2009
All items of AG0.5 products
|
Change in tooth thinning (Backlash)
Backlash changed as below
0.04 to 0.15 Changed to 0.02 to 0.14 |
5.January.2009
30 items of MSGA/MSGB Ground Spur Gears
|
The shapes - changed
|
5.January.2009
(1) All 5 items of SSY Spur Gears with module 0.8
(2) All 8 items of BSS Spur Gears with module 0.5 and 0.8. |
Change in tooth thinning (Backlash)
|
5.January.2009
SSAY Spur Gears with Built-in Clamps
All 30 items with module 0.8
|
Change in tooth thinning (Backlash)
|
31.Oct. 2008
(1) SR Racks: 15 items
(2) SRCP Racks: 3 items |
Discontinued production.
|
Oct. 2008 Steel Thin Face Spur Gears
SSY1.25 31 items in total
Steel Hubless Thin Face Spur Gears
SSAY1.25 18 items in total
Brass Racks
BSR1.25-300 1 item
|
Discontinued production. |
1.Oct. 2008
All KHK Products |
Price revisions for all of KHK products due to steep price increases for such critical materials as Carbon steel for Machine Structural Use, Crude Oil.
|
1.Mar. 2007
2 items of SRS Products |
Change in material
SS400 → SPCC |
Jan. 2007
All racks with bolt holes - Module 2.5 and over
|
The counterbore dimensions of bolt holes - changed.
|
Changes in Catalog Offeriing
anti-chronological order
Oct. 2006
(1) Bevel Gears (CB, SB related products): 14 items
(2) Bevel Gears (MBSA (B) related products) : 32
items
Miter Gears (SMS related products): 6 items |
Discontinued production
|
Oct. 2006
SS1.5-100
SSA1.5-100 |
The dimension of Web O.D.(symbol: I) - changed.
SS1.5-100 from 133 → to 125
SSA1.5-100 from 133 → to 125
|
Jan. 12, 2006
Miter Gears: MMSA (B), MMS, SMS, SMA (B)(C), MM, SM
Bevel Gears: MBSA (B), SBS, SB, CB, SBY |
The backlashes - changed.
| Module |
JIS B 1704 grade 3 and/or 4
Material: Metal |
| 3.5 |
0.10 - 0.20 : Changed to 0.25 |
| 4 |
0.12 - 0.22 : Changed to 0.27 |
| 5 |
0.14 - 0.24 : Changed to 0.34 |
| 6 |
0.16 - 0.26 : Changed to 0.36 |
| 8 |
0.20 - 0.30 : Changed to 0.45 |
| 10 |
0.25 - 0.35 : Changed to 0.50 |
|
Jun. 1, 2005
SSA5-32, SSA5-35, SSA5-36 |
The shapes - changed
 |
|
 |
| Before the change |
|
After the change |
|
Jul. 2004
MMSG Ground Spiral Miter Gears (30 items)
MMS Spiral Miter Gears (20 items)
MM Miter Gears (10 items)
MBSG Ground Spiral Bevel Gears (8 items) |
- changed. Because of this, approx. 15% of increase in the bending strength gained.
Before the change: Tooth area High-frequency induction hardened after carburizing.
After the change: Carburizing and quenching. (Bore and hub are masked during the processes)
*Note : The masked areas can be modified, even though the hardness is somewhat higher.
- changed
Before the change: Black oxide
After the change: None |
Aug. 2003
Spiral Bevel Gears,
Spiral Miter Gears |
Stopped boring a small hole in the base of each gear. (The hole was made for the convnience of the manufacturers' work to stop turning of gear blank at the time of gear-cutting. Improvement in technology enabled us to do so.) |
Jan. 2003
Worms - Module 5 and Module 6
Worm Wheels - Module 5 and Module 6 |
Discontinued production.
|
